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Degradation and utilization of polyvinyl chloride(PVC):Challenges and opportunities toward a circular economy 认领 引用
1
作者 Rui Huang Jiaolong Meng Xuefeng Jiang 《Green Energy & Environment》 SCIE EI CAS CSCD 2026年第2期283-316,共34页
Polyvinyl chloride(PVC)poses persistent environmental and recycling challenges due to its high chlorine content,complex additives,and structural resistance to degradation.Recent research has shifted focus from traditi... Polyvinyl chloride(PVC)poses persistent environmental and recycling challenges due to its high chlorine content,complex additives,and structural resistance to degradation.Recent research has shifted focus from traditional disposal methods toward chemically informed strategies that valorize PVC within the framework of a circular economy.This review systematically summarizes three emerging pathways for PVC transformation.The first involves catalytic deconstruction into small molecules such as chlorinated olefins,hydrocarbons,and oxygenates through thermal,photocatalytic,and electro-assisted processes.The second explores backbone-preserving reconstruction into functional materials,including porous carbons,membranes,ion-conducting films,and vitrimer-type polymers by leveraging selective dechlorination and structural reprogramming.The third addresses the co-processing of PVC with mixed plastic wastes through synergistic catalytic systems that tolerate chlorine-rich streams and promote selective transformation.Across all pathways,emphasis is placed on structure-property correlations,chlorine management,additive compatibility,and downstream utility.Summary tables and schematic diagrams are included to compare system efficiencies,product selectivities,and application scopes.By integrating mechanistic understanding with materials innovation,this review highlights how PVC can be reimagined as a tunable molecular platform rather than a persistent pollutant. 展开更多
关键词 Polyvinyl chloride(PVC) Chemical recycling Functional material reconstruction Sustainable polymer upcycling
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Thermomechanical and microstructural characteristics of cemented backfill incorporating low-dosage polyvinyl chloride powder 认领 引用 被引量：1
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作者 Chao Zhang Jinping Guo +3 位作者 Tingting Li Weidong Song Yuan Wang Abbas Taheri 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第7期2206-2219,共14页
With the increasing mining depth,heat hazards have become a critical challenge in deep underground operations.This study explores the incorporation of polyvinyl chloride(PVC)powder as a partial cement replacement in c... With the increasing mining depth,heat hazards have become a critical challenge in deep underground operations.This study explores the incorporation of polyvinyl chloride(PVC)powder as a partial cement replacement in cemented backfill to improve thermal insulation and promote sustainable waste utilization.Five mix designs were prepared with 0,5wt%,10wt%,15wt%,and 20wt%PVC,and their thermomechanical behaviors were systematically evaluated through uniaxial compressive strength(UCS)testing,thermal parameter measurements,energy evolution analysis,and micro structural characterization via scanning electron microscopy.The results showed that the UCS and energy absorption capacity first increased and then decreased with PVC addition,reaching an optimum at10wt%PVC,which achieved an 87.5% higher strength and improved energy dissipation compared with the control.The thermal conductivity and specific heat capacity progressively decreased with increasing PVC content,with the maximum reductions of 23.0% and 40.2%,respectively,for 20wt%PVC.Microstructural analysis confirmed that moderate PVC addition reduced the porosity and enhanced the internal compactness,whereas excessive PVC likely inhibited calcium silicate hydrate gel formation and weakened the structural integrity.A PVC dosage of 10wt% was identified as the optimal replacement level,providing a favorable balance between strength and thermal insulation.This study provides new insights into sustainable backfill design and offers a practical strategy for mitigating thermal hazards in deep mining environments. 展开更多
关键词 cemented backfill polyvinyl chloride uniaxial compressive strength thermal properties microstructure
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Recycling Polyvinyl Chloride(PVC)Pipe Wastes into PVC/ZnO Nanofiber-Based Triboelectric Nanogenerators 认领 引用 被引量：2
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作者 Shabnam Yavari Merey Sembay +3 位作者 Yersaiyn Bushanov Zhumabay Bakenov Mehdi Shafiee Gulnur Kalimuldina 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2025年第3期282-294,共13页
Recycling plastic waste into triboelectric nanogenerators(TENGs)presents a sustainable approach to energy harvesting,self-powered sensing,and environmental remediation.This study investigates the recycling of polyviny... Recycling plastic waste into triboelectric nanogenerators(TENGs)presents a sustainable approach to energy harvesting,self-powered sensing,and environmental remediation.This study investigates the recycling of polyvinyl chloride(PVC)pipe waste polymers into nanofibers(NFs)optimized for TENG applications.We focused on optimizing the morphology of recycled PVC polymer to NFs and enhancing their piezoelectric properties by incorporating ZnO nanoparticles(NPs).The optimized PVC/0.5 wt%ZnO NFs were tested with Nylon-6 NFs,and copper(Cu)electrodes.The Nylon-6 NFs exhibited a power density of 726.3μWcm-2—1.13 times higher than Cu and maintained 90%stability after 172800 cycles,successfully powering various colored LEDs.Additionally,a 3D-designed device was developed to harvest energy from biomechanical movements such as finger tapping,hand tapping,and foot pressing,making it suitable for wearable energy harvesting,automatic switches,and invisible sensors in surveillance systems.This study demonstrates that recycling polymers for TENG devices can effectively address energy,sensor,and environmental challenges. 展开更多
关键词 energy harvesting motion sensors piezoelectric zinc oxide polyvinyl chloride(PVC) recycling triboelectric nanogenerators
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Synthesis of New Functionalized Polymers Through the Post-Modification of Polyvinyl Chloride 认领 引用
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作者 Yuchen Li Ruochen Cao +4 位作者 Yuxiang Qin Haoran Zhang Xiaoyan Tang Meng Wang Ding Ma 《Carbon and Hydrogen》 SCIE CAS CSCD 2025年第1期52-57,共6页
Polyvinyl chloride(PVC)is one of the most widely used plastic materials worldwide,particularly in long-life applications such as construction materials.However,recycling options for PVC waste remain limited,as convent... Polyvinyl chloride(PVC)is one of the most widely used plastic materials worldwide,particularly in long-life applications such as construction materials.However,recycling options for PVC waste remain limited,as conventional methods often degrade material quality or generate environmentally hazardous byproducts.In this study,we demonstrate an efficient process to convert PVC into new polymers with variable aromatic groups,using triethylsilane as the reductant in different solvents.This approach enables the production of polymers analogous to functionalized polyethylene(PE),which are typically challenging to obtain through conventional copolymerization or direct post-modification of C-H bonds in PE.The resulting polymers exhibit tunable thermal and mechanical properties depending on the introduced aromatic groups,which not only enhance the sustainable valorization of PVC waste,but also provide an opportunity for the synthesis of new functionalized polymers. 展开更多
关键词 functionalized polymer polyvinyl chloride post‐modification upcycling
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Thermogravimetric characteristics and different kinetic models for medical waste composition containing polyvinyl chloride-transfusion tube 认领 引用 被引量：3
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作者 邓娜 王维维 +2 位作者 崔文谦 张于峰 马洪亭 《Journal of Central South University》 SCIE EI CAS 2014年第3期1034-1043,共10页
Thermogravimetric study of medical transfusion tube （MTT） waste containing polyvinyl chloride （PVC） was carried out using the thermogravimetric analyser （TGA） with N2, at different heating rates of 5, 10, 20, 30... Thermogravimetric study of medical transfusion tube （MTT） waste containing polyvinyl chloride （PVC） was carried out using the thermogravimetric analyser （TGA） with N2, at different heating rates of 5, 10, 20, 30, 50 ℃/min. The purpose is to obtain pyrolysis characteristics and kinetic parameters of medical waste. The experimental results indicate that the pyrolysis behavior of the MTT sample is in agreement with its main ingredient of PVC, appearing two stair stepping stages. The influence of the additives in MTT on pyrolysis behavior was also revealed, which could improve MTT pyrolysis at lower temperature in the first stage, and cause obvious unsmoothness and asymmetry of the second DTG peak. Four n-order kinetic models of Coats-Redfern, Ozawa, Kissinger and Freeman-carroll were used to get the kinetic parameters. Furthermore, a novel ＂two-step four-reaction model＂ was established to simulate the whole continuous process. The different methods and the kinetic parameters thus obtained were discussed and compared with each other in literatures. The reasons of deviation among kinetic values were tried to be elucidated. The new established model could more satisfactorily describe the pyrolysis process of MTT, being more mechanistic and conveniently serving for the engineering. 展开更多
关键词 medical waste polyvinyl chloride （PVC） medical transfusion tube （MTT） pyrolysis characteristics model
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EFFECT OF POLYANILINE AS A SURFACE MODIFIER OF TiO_2 NANO-PARTICLES ON THE PROPERTIES OF POLYVINYL CHLORIDE/TiO_2 NANOCOMPOSITES 认领 引用 被引量：7
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作者 Ali Olad Sepideh Behboudi Ali Akbar Entezami 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2013年第3期481-494,共14页
Surface of TiO2 nanoparticles was modified with the in situ chemical oxidative polymerization of aniline. Polyaniline modified TiO2 nanoparticles （PANI-TiO2） were characterized with the FT-IR, XRD, SEM and TEM techn... Surface of TiO2 nanoparticles was modified with the in situ chemical oxidative polymerization of aniline. Polyaniline modified TiO2 nanoparticles （PANI-TiO2） were characterized with the FT-IR, XRD, SEM and TEM techniques. Results confirmed that PANI was grafted successfully on the surface of TiO2 nanoparticles, therefore agglomeration of nanoparticles decreased dramatically. Polyvinyl chloride nanocomposites filled with 1 wt%-5 wt% of PANI-TiO2 and TiO2 nanoparticles were prepared via the solution blending method. PVC nanocomposites were analyzed with FT-IR, XRD, SEM, TG/DTA, DSC and tensile test techniques. Effect of PANI as surface modifier of nanoparticles was discussed according to the final properties of PVC nanocomposites. Results demonstrated that deposition of PANI on the surface of TiO2 nanoparticles improved the interfacial adhesion between the constituents of nanocomposites, which resulted in better dispersion of nanoparticles in the PVC matrix. Also PVC/PANI-TiO2 nanocomposites showed higher thennal resistance, tensile strength and Young＇s modulus compared to those of unfilled PVC and PVC/TiO2 nanocomposites. 展开更多
关键词 Polymer nanocomposite Polyvinyl chloride Polyaniline TiO2 nano-additive Surface modification.
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Preparation of a Crosslinked Chitosan Coated Calcium Sulfate Whisker and Its Reinforcement in Polyvinyl Chloride 认领 引用 被引量：19
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作者 Jiayang Cui Yangben Cai +2 位作者 Wenjin Yuan Zhongfei Lv Shiai Xu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2016年第8期745-752,共8页
A calcium sulfate whisker （CSW） coated with glutaraldehyde crosslinked chitosan （GACS） was prepared to reinforce polyvinyl chloride （PVC） in this study. The results show that the optimum concentration of both ch... A calcium sulfate whisker （CSW） coated with glutaraldehyde crosslinked chitosan （GACS） was prepared to reinforce polyvinyl chloride （PVC） in this study. The results show that the optimum concentration of both chitosan （CS） and glutaraldehyde （GA） is 0.05 wt%. The tensile strength, impact strength, flexural modulus and vicat softening temperature of the PVC composite with 12 wt% of modified CSW are in- creased by 1 Z5%, 40.4%, 0.8% and 3.8% compared with those of the PVC composite with 12 wt~ of unmodified CSW, and by 2.9%, 42.4%, 2Z1% and 6.8% compared with those of pure PVC, respectively. The dynamic mechanical analysis results indicate that the modified CSW/PVC composite exhibits much higher storage modulus and glass transition temperature than those of unmodified CSW/PVC composite and pure PVC. In addition, the modified CSW/PVC composite also demonstrates good thermal properties with a high rapidest decomposition temperature （Trvd） and char residue. The scanning electron microscopy images of tensile-fractured surfaces show that the modified CSW has a strong interfacial adhesion with PVC matrix. 展开更多
关键词 Polyvinyl chloride Polymer composites Surface modification Calcium sulfate Mechanical properties
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The Influence of Additives on Crystallization of Polyvinyl Chloride 认领 引用 被引量：5
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作者 刘亚群 张超灿 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第2期271-275,共5页
Acetanilide, adipic acid and potassium hydrogen phthalate were chosen as nucleating agents of polyvinyl chloride（PVC）, and their effects on PVC crystallization were studied by differential scanning calorimetry, wide... Acetanilide, adipic acid and potassium hydrogen phthalate were chosen as nucleating agents of polyvinyl chloride（PVC）, and their effects on PVC crystallization were studied by differential scanning calorimetry, wide angle X-ray diffraction and fourier transform infrared spectroscopy. The experimental results indicate that all of the three additives are compatible with PVC to some extent, but adipic acid＇s compatibility with PVC is less satisfactory. The three additives can improve PVC crystallinity, and acetanilide can decrease PVC glass transition temperature（T）and narrow PVC melting range, while adipic acid and potassium hydrogen phthalate rise T of PVC and widen its melting range. All additives do not affect PVC crystal system and all g samples are in orthorhombic system. All additives can improve （200）, （110）, （210） and （201, 111） planes growing. Moreover, acetanilide and adipic acid can shrink PVC spacings and improve the crystal perfection of PVC, but potassium hydrogen phthalate swells spacings and reduces the perfection of PVC crystal. 展开更多
关键词 polyvinyl chloride crystalline structure differential scanning calorimetry wide angle X-ray diffraction
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PVC建筑膜材热合连接强度研究 认领 引用 被引量：2
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作者 崔家春 杨梦姚 《建筑结构》 北大核心 2026年第4期149-154,共6页
通过四种型号PVC建筑膜材焊缝试件的单轴拉伸试验,获得了搭接宽度分别为20、25、30、40、50、60、70mm时焊缝试件的应力-应变曲线、破坏形式以及焊缝强度随搭接宽度变化的关系。结果表明:焊缝试件的应力-应变曲线与母材类似,均呈现较为... 通过四种型号PVC建筑膜材焊缝试件的单轴拉伸试验,获得了搭接宽度分别为20、25、30、40、50、60、70mm时焊缝试件的应力-应变曲线、破坏形式以及焊缝强度随搭接宽度变化的关系。结果表明:焊缝试件的应力-应变曲线与母材类似,均呈现较为明显的三阶段——线性阶段、应变强化阶段和应力强化阶段;焊缝强度随搭接宽度的增加而逐渐增大,并在搭接宽度达到一定值时,焊缝强度达到稳定;随着搭接宽度的增加,试件的破坏位置逐渐从热合区内向热合区外转变,直至不受搭接宽度的影响;强度为4300、5600、7000、8000N/5cm的法拉利TX30系列PVC膜材,最小热合搭接宽度建议分别取25、30、60、70mm;PVC膜材热合搭接连接强度与膜材型号、膜材类型有关,对抗拉强度较大的膜材或重要工程,建议通过试验确定搭接宽度。 展开更多
关键词 聚氯乙烯(PVC)膜材 搭接宽度 热合连接 焊缝强度 单轴拉伸试验
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Enhancement of Photocatalytic Degradation of Polyvinyl Chloride Plastic with Fe2O3 Modified AgNbO3 Photocatalyst under Visible-light Irradiation 认领 引用 被引量：2
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作者 CHANG Hai-Bo LIU Jun-Bo +4 位作者 DONG Zheng WANG Dan-Dan XIN Yu JIANG Zhuo-Lin TANG Shan-Shan 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2021年第12期1595-1603,1552,共9页
The solid-phase photocataKtic degradation of polyvinyl chloride(PVC)plastic with AgNbO3/Fe2O3 is studied under visible-light irradiation.The PVC-(AgNbO3/Fe2O3)samples are characterized by X-ray photo... The solid-phase photocataKtic degradation of polyvinyl chloride(PVC)plastic with AgNbO3/Fe2O3 is studied under visible-light irradiation.The PVC-(AgNbO3/Fe2O3)samples are characterized by X-ray photoelectron spectroscope(XPS),scanning electron microscope(SEM),gas chromatography(GC),and UV-vis diffusion reflectance spectra(UV-vis DRS).The photocatalytic properties of PVC-(AgNbO3/Fe2O3)samples are systematically investigated.More amounts of generated CO2,greater texture change and higher weight loss rate were exhibited in the system of PVC-(AgNbO3/Fe2O3)than pure PVC film.The weight loss rate is ten times higher than that of pure PVC film,which reaches to 46.53%with optimum amount of O.5wt% Fe2O3.Active radicals generate primarily on the surface of Fe2O3 particles,which cause composite plastic decomposition on the PVC-(AgNbO3/Fe2O3)interface and extend into polymer interor.The study provides a new promising way to degrade the plastic waste under visible-light. 展开更多
关键词 photocatalytic degradation polyvinyl chloride AgNbO3/Fe2O3
Surface Sulfonation of Polyvinyl Chloride by Plasma for Antithrombogenicity 认领 引用 被引量：3
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作者 刘鹏 陈亚芍 《Plasma Science and Technology》 SCIE EI CAS 2004年第3期2328-2332,共5页
To enhance the blood compatibility of Polyvinyl Chloride (PVC) film, the film was modified by SO2/O2 gas plasma treatment. The effect of surface sulfonation of PVC treated by various SO2/O2 gas plasma depended on the ... To enhance the blood compatibility of Polyvinyl Chloride (PVC) film, the film was modified by SO2/O2 gas plasma treatment. The effect of surface sulfonation of PVC treated by various SO2/O2 gas plasma depended on the volume ratio O2/(SO2 +O2). When the volume ratio was 0.5, the effect of sulfonation was the best. Sulfonic acid groups were specifically and efficiently introduced onto the PVC surface, which was proved by X-ray photoelectron spectroscopy (XPS) and Attenuated Total Reflectance Fourier Transfer Infrared (ATR-FTIR) spectroscopy. The surface microstructure of modified PVC film was studied with scanning electron microscopy (SEM). The antithrombogenicity of the samples was determined by the activated partial thromboplastin time (APTT), prothrombin time (PT), thrombin time (TT) and plasma recalcification time (PRT) tests and platelet adhesion experiment. The results indicated that the antithrombogenicity of modified PVC was improved remarkably. 展开更多
关键词 polyvinyl chloride plasma surface sulfonation antithrombogenicity
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Gasification kinetics of char formed from waste polyvinyl chloride for efficient utilization in ironmaking process 认领 引用
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作者 Guang Wang Hong-qiang Zhang +1 位作者 Jing-song Wang Qing-guo Xue 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2022年第10期1535-1544,共10页
In the prevailing incineration processes of municipal solid waste,the presence of polyvinyl chloride(PVC)may cause environmental problems.The energy-intensive ironmaking sector in the iron and steel industry operates ... In the prevailing incineration processes of municipal solid waste,the presence of polyvinyl chloride(PVC)may cause environmental problems.The energy-intensive ironmaking sector in the iron and steel industry operates at high temperature and under high reduction potential with the function of energy conversion,which can provide a potential path for the collaborative utilization of waste plastics in large quantities and low cost.The gasification of the char formed from PVC when processed in the ironmaking sector is significant for the development of the related technologies.Thus,the gasification experiment of PVC char and traditional carbonaceous materials was performed by thermogravimetric analysis.The results indicated that the gasification ability decreased in the sequence of PVC char>anthracite coal>coke>graphite.Then,kinetics were also analyzed by Coats-Redfern and Doyle approximations.The PVC char showed the best gasification ability with the smallest activation energy,ranging from 87.18 to 117.52 kJ/mol,and the smaller graphitization degree of PVC char compared with other carbonaceous materials should be the main reason for its excellent gasification reactivity. 展开更多
关键词 Polyvinyl chloride(PVC) Thermochemical conversion Ironmaking Char Gasification
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Electro-reductive carboxylation of C–Cl bonds in unactivated alkyl chlorides and polyvinyl chloride with CO2 认领 引用
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作者 Li Li Zhi-Xin Yan +7 位作者 Chuan-Kun Ran Yi Liu Shuo Zhang Tian-Yu Gao Long-Fei Dai Li-Li Liao Jian-Heng Ye Da-Gang Yu 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第12期411-415,共5页
The carboxylation of readily available organo halides with CO2represents a practical strategy to afford valuable carboxylic acids.However,efficient carboxylation of inexpensive unactivated alkyl chlorides is still ... The carboxylation of readily available organo halides with CO2represents a practical strategy to afford valuable carboxylic acids.However,efficient carboxylation of inexpensive unactivated alkyl chlorides is still underdeveloped.Herein,we report the electro-reductive carboxylation of C–Cl bonds in unactivated chlorides and polyvinyl chloride with CO2.A variety of alkyl carboxylic acids are obtained in moderate to good yields under mild conditions with high chemoselectivity.Importantly,the utility of this electroreductive carboxylation is demonstrated with great potential in polyvinyl chloride(PVC)upgrading,which could convert discarded PVC from hydrophobic to hydrophilic functional products.Mechanistic experiments support the successive single electron reduction of unactivated chlorides to generate alkyl anion species and following nucleophilic attack on CO2to give desired products. 展开更多
关键词 Carbon dioxide Carboxylation Electrochemistry Unactivated alkyl chlorides Polyvinyl chloride
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STUDY ON THE MORPHOLOGY OF POLYVINYL CHLORIDE/POLYSTYRENE BLENDS BY ELECTRON MICROPROBE ANALYSIS 认领 引用
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作者 Zheng-ping Fang Gen-lin Wang +2 位作者 Guo-ping Cai Cheng-wei Xu Jie Qian 《Chinese Journal of Polymer Science》 SCIE EI CAS 2000年第5期437-441,共5页
The morphology of polyvinyl chloride/polystyrene(PVC/PS)blend samples with different mass ratios,prepared by means of solution casting and melt mixing,have been successfully examined by electron microprobe analysis(EM... The morphology of polyvinyl chloride/polystyrene(PVC/PS)blend samples with different mass ratios,prepared by means of solution casting and melt mixing,have been successfully examined by electron microprobe analysis(EMP).This experiment was performed in a scanning electron microscope attached to an energy dispersive X-ray analyzer.Differential scanning calorimetry was also used to investigate the phase separation of the blends.The results show that PVC and PS are incompatible and the blends have sea-islands phase structures.Blends prepared via melt mixing have finer phase-dispersion than those prepared via solution casting. 展开更多
关键词 electron microprobe analysis polyvinyl chloride/polystyrene blends morphology
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Phosphorus Containing Rubber Seed oil as a Flame Retardant Plasticizer for Polyvinyl Chloride 认领 引用
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作者 Hongying Chu Huabei Li +1 位作者 Xiaoyan Sun Yaowang Zhang 《Journal of Renewable Materials》 SCIE EI CAS 2023年第4期1731-1743,共13页
The application of phthalate plasticizers has been restricted around the world due to their poor migration and potential harm to the human body.Hence,producing functional bio-based plasticizers via exploiting clean an... The application of phthalate plasticizers has been restricted around the world due to their poor migration and potential harm to the human body.Hence,producing functional bio-based plasticizers via exploiting clean and reusable resources meets the satisfaction of current demands.In this study,flame-retardant rubber seed oil-based plasticize(FRP)was prepared via epoxidation reaction and ring opening addition reactions,which was used as a flame-resistant plasticizer for polyvinyl chloride to replace petroleum-based phthalate plasticizer.When DOP was replaced with FRP,the torque of PVC blends increased from 11.4 to 18.4 N⋅m,the LOI value increased from 24.3%for PVC-FRP-0%to 33.1%for PVC-FRP-20.The THR value diminished from 39 MJ/m2(pertaining to PVC-FRC-0)to 22 MJ/m2Tg increased from 23°C to 47°C,the weight loss of plasticized PVC blends significantly reduced from 22.6%to 2.8%in leaching tests.The study provided a new way to prepare flame retardant plasticizer using rubber seed oil as raw material. 展开更多
关键词 Plasticizer rubber seed oil polyvinyl chloride vegetable oil modification
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SYNERGISTIC MODIFICATION OF EPDM AND CROSSLINKING AGENT IN IMMISCIBLE BLENDS OF POLYVINYL CHLORIDE WITH LOW DENSITY POLYETHYLENE 认领 引用
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作者 方征平 《Chinese Journal of Polymer Science》 SCIE EI CAS 2006年第2期147-154,共8页
The synergism of ethylene-propylene-diene monomer copolymer （EPDM） and dicumyl peroxide （DCP, a crosslinking agent） in low density polyethylene （LDPE）/poly（vinyl chloride） （PVC） blends was investigated. When... The synergism of ethylene-propylene-diene monomer copolymer （EPDM） and dicumyl peroxide （DCP, a crosslinking agent） in low density polyethylene （LDPE）/poly（vinyl chloride） （PVC） blends was investigated. When EDPM and DCP are added to the blends simultaneously, the tensile properties could be improved significantly, especially for the blends with LDPE matrix. For example, incorporation of 10/1 （mass ratio） EPDM/DCP improves the tensile strength of the LDPE/PVC （mass ratio 80/20） blend from 7.9 MPa to 8.5 MPa and the elongation at break from 25% to 503%. Results from selective extraction, phase-contrast microscopy and thermal analysis reveal that the improvement in the tensile properties of the blends with LDPE matrix is principally due to the formation of a fine crosslinking network of the LDPE and EPDM phase. The outstanding modification effect of EPDM is explained by its dual functions： molecular entanglement with LDPE and the enhanced efficiency of DCP in the blends. 展开更多
关键词 Polyvinyl chloride Polyethylene EPDM Blend Crosslinking
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Molecular Dynamics Simulation Studies on the Cooling Process of Polyvinyl Chloride 认领 引用
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作者 YANG Hua LI Ze-sheng YANG Yong-biao ZHANG Xiu-bin SUN Chia-chung 《Chemical Research in Chinese Universities》 SCIE EI CAS 2006年第1期80-84,共5页
By means of molecular dynamics simulation, the transition of the conformations of polyvinyl chloride during a cooling process from 600 to 300 K was studied. The results show that the amorphous polyvinyl chloride chain... By means of molecular dynamics simulation, the transition of the conformations of polyvinyl chloride during a cooling process from 600 to 300 K was studied. The results show that the amorphous polyvinyl chloride chain experiences the melting state, elastic state and glass state and the conformations can be characterized by the increases of the trans-state of C--C--C--C and the near gauche-state of C--C--C--C1 with the decrease of temperature. It is found that the transition of the conformations is driven mainly by the Coulomb interaction between chain segments. 展开更多
关键词 Molecular dynamics simulation Polyvinyl chloride Cooling Conformation
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Research on the Glass Transition Temperature and Mechanical Properties of Poly(vinyl chloride)/Dioctyl Phthalate (PVC/DOP) Blends by Molecular Dynamics Simulations 认领 引用 被引量：7
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作者 Jing Li Shao-Hua Jin +4 位作者 Guan-Chao Lan Zi-Shuai Xu Lu-Ting Wang Na Wang Li-Jie Li 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2019年第8期834-840,共7页
To effectively improve the performance and expand the applications of polymers, molecular dynamics(MD) simulations with the COMPASS force field have been applied to predict the miscibility, glass transition temperatur... To effectively improve the performance and expand the applications of polymers, molecular dynamics(MD) simulations with the COMPASS force field have been applied to predict the miscibility, glass transition temperature(Tg), and mechanical properties of poly(vinyl chloride)/dioctyl phthalate(PVC/DOP) blends. The solubility parameter values obtained are in good agreement with the reference data and the little difference(|Δδ|< 2.0 MPa0.5) between two components indicates that PVC/DOP is a miscible system. Tg is predicted by the slope of the free volume and density versus temperature simulation data based on density and free volume theory which is agree well with the experimental data. In addition, the analyses of mechanical properties results indicate that the values of Young’s modulus(E), bulk modulus(K), and shear modulus(G) decrease with the addition of DOP, demonstrating that the rigidity of material is weakened and the ductility is improved. The mechanical properties can also be effectively improved by increasing the temperature, which may provide a more flexible mixture, with lower E, K, G but an increased ductility. 展开更多
关键词 Poly(vinyl chloride)(PVC) Dioctyl phthalate (DOP) MD simulations Glass transition temperature Mechanical properties
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Compressive Performance of Fiber Reinforced Recycled Aggregate Concrete by Basalt Fiber Reinforced Polymer-Polyvinyl Chloride Composite Jackets 认领 引用 被引量：3
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作者 Zhijie Fan Huaxin Liu +2 位作者 Genjin Liu Xuezhi Wang Wenqi Cui 《Journal of Renewable Materials》 SCIE EI CAS 2023年第4期1763-1791,共29页
The development of recycled aggregate concrete(RAC)provides a new approach to limiting the waste of natural resources.In the present study,the mechanical properties and deformability of RACs were improved by adding ba... The development of recycled aggregate concrete(RAC)provides a new approach to limiting the waste of natural resources.In the present study,the mechanical properties and deformability of RACs were improved by adding basalt fibers(BFs)and using external restraints,such as a fiber-reinforced polymer(FRP)jacket or a PVC pipe.Samples were tested under axial compression.The results showed that RAC(50%replacement of aggregate)containing 0.2%BFs had the best mechanical properties.Using either BFs or PVC reinforcement had a slight effect on the loadbearing capacity and mode of failure.With different levels of BFs,the compressive strengths of the specimens reinforced with 1-layer and 3-layer basalt fiber reinforced polymer(BFRP)increased by 6.7%–10.5%and 16.5%–23.7%,respectively,and the ultimate strains increased by 48.5%–80.7%and 97.1%–141.1%,respectively.The peak stress of the 3-layer BFRP-PVC increased by 42.2%,and the ultimate strain improved by 131.3%,relative to the control.This reinforcement combined the high tensile strength of BFRP,which improved the post-peak behavior,and PVC,which enhanced the structural durability.In addition,to investigate the influence of the various constraints on compressive behavior,the stress-strain response was analyzed.Based on the analysis of experimental results,a peak stress-strain model and an amended ultimate stress-strain model were proposed.The models were verified as well;the result showed that the predictions from calculations are generally consistent with the experimental data(error within 10%).The results of this study provide a theoretical basis and reference for future applications of fiber-reinforced recycled concrete. 展开更多
关键词 Basalt fiber reinforced polymer polyvinyl chloride recycled aggregate concrete axial compression performance stress-strain relationships stress-strain model
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Recycling of PVC tarpaulin reinforced with PET through glycolysis using betaine,a bio-based catalyst 认领 引用
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作者 Jae Kyun Kim Yejin Won +4 位作者 Jeonghoon Yoon Kyung Min Lee Yeyoon Choi Dong Hyun Kim Kyoung Heon Kim 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第2期366-379,共14页
Polyvinyl chloride(PVC)tarpaulins reinforced with poly(ethylene terephthalate)(PET)fibers are widely used in various industrial applications.However,the increasing demand for recycling PVC tarpaulin waste poses challe... Polyvinyl chloride(PVC)tarpaulins reinforced with poly(ethylene terephthalate)(PET)fibers are widely used in various industrial applications.However,the increasing demand for recycling PVC tarpaulin waste poses challenges because of the difficulty in separating the two different plastics.In this study,we investigated the possibility of recycling PVC and PET through the glycolysis of PET.The milled PVC tarpaulin underwent a glycolysis process,selectively depolymerizing the PET fibers into water-soluble bis(2-hydroxyethyl)terephthalate(BHET),while the PVC was removed by filtration.The PET fibers were selectively depolymerized by 77.6%after reacting at 190℃ for 2 h in the presence of 0.5%(w/w)betaine as a catalyst,quantitatively yielding BHET.During glycolysis,the physical appearance of the PVC changed because of leaching of the plasticizer,however,no dechlorination or shortening of the PVC polymer was observed.Interestingly,additives in PVC,such as CaCO3and CZ-stabilizer,act as catalysts for glycolysis,thereby enhancing PET depolymerization.The recovered PVC,when blended into a PVC formulation,maintained its mechanical properties and appearance up to 40 parts per hundred resins in roll-mill-processed sheets.In addition,ethylene glycol,which is used as a solvent in glycolysis,can be reused up to three times without the additional removal of BHET.This study demonstrated an industrially applicable method for simultaneously recycling PVC and PET from widely used tarpaulins. 展开更多
关键词 Plastic recycling Tarpaulin Polyvinyl chloride Poly(ethylene terephthalate) Glycolysis
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