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Effect of Saccharin on Crystallization Behavior of Electroless Cobalt Plating 认领 引用 被引量：1
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作者 Yu-Xin Luo Jing-Jing Wang +5 位作者 Lu Wang Zi-Yi Yan Yi Ma Xin Bo Jing-Shuang Dang Zeng-Lin Wang 《电化学（中英文）》 CAS 北大核心 2025年第8期23-33,共11页
In the process of electroless cobalt plating,the saccharin additive can significantly change the surface morphology,texture orientation,and conductivity of the cobalt coating layer.When the amount of saccharin was 3 m... In the process of electroless cobalt plating,the saccharin additive can significantly change the surface morphology,texture orientation,and conductivity of the cobalt coating layer.When the amount of saccharin was 3 mg·L-1,the cobalt coating transformed from disordered large grains to a honeycomb structure,with a preferred orientation of(002)facet on hexago-nal close-packed(HCP)cobalt crystals.The resistivity of the cobalt film decreased to 14.4μΩ·cm,and further decreased to 10.7μΩ·cm after the annealing treatment.When the concentration of saccharin was increased,the grain size was gradually refined and a“stone forest”structure was observed,with the preferred orientation remaining unchanged.The addition of saccharin also slightly improves the purity of cobalt coating to a certain extent.Through the study of the crystallization behavior of cobalt electroless plating,saccharin molecules can adsorb to specific c-sites on the cobalt dense crystal plane,inhibiting the growth of abc stacking arrangement and inducing the crystal growth in ab stacking mode,thereby achieving optimal growth of HCP(002)texture. 展开更多
关键词 Electroless cobalt plating Additives Saccharin Crystallization behavior
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Formation and crystallization behavior of Fe-based amorphous precursors with pre-existingα-Fe nanoparticles-Structure and magnetic properties of high-Cu-content Fe-Si-B-Cu-Nb nanocrystalline alloys 认领 引用 被引量：9
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作者 Yanhui Li Xingjie Jia +5 位作者 Wei Zhang Yan Zhang Guoqiang Xie Zhiyong Qiu Junhua Luan Zengbao Jiao 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2021年第6期171-181,共11页
Structure,crystallization behavior,and magnetic properties of as-quenched and annealed Fe81.3Si4O13Cu1.7(Cu1.7)alloy ribbons and effects of Nb alloying have been studied.Three-dimensional atom probe and tr... Structure,crystallization behavior,and magnetic properties of as-quenched and annealed Fe81.3Si4O13Cu1.7(Cu1.7)alloy ribbons and effects of Nb alloying have been studied.Three-dimensional atom probe and transmission electron microscopy analyses reveal that high-number-density Cu-clusters and Pre-existing Nano-sized a-Fe Particles(PN-a-Fe)are coexistence in the melt-spun Cu1.7 amorphous matrix,and the PN-α-Fe form by manners of one-direction adjoining and enveloping the Cu-clusters.Two-step crystallization behavior associated with growth of the PN-a-Fe and subsequent nucleation and growth of newly-formedα-Fe is found in the primary crystallization stage of the Cu1.7 alloy.The number densities of the Cu-clusters and PN-a-Fe in melt-spun Fe81.3-xSi4B13Cu1.7Nbxalloys are gradually reduced with enriching of Nb,and a fully amorphous structure forms at 4 at.%Nb,although smaller Cu-clusters still exist.After annealing,2 at.%Nb coarsens the average size(Dα-Fe)of theα-Fe grains from 14.0 nm of the Nb-free alloy to 21.6 nm,and 4 at.%Nb refines the Dα-Feto 8.9 nm.The mechanisms of theα-Fe nucleation and growth during quenching and annealing for the alloys with large quantities of PN-α-Fe as well as after Nb alloying have been discussed,and an annealing-induced oc-Fe growth mechanism in term of the barrier co-contributed by competitive growth among the PN-a-Fe and diffusion-suppression effect of Nb atoms has been proposed.A coercivity(HC)αDα-Fe3correlation has been found for the nanocrystalline alloys,and the permeability is inverse with the HC. 展开更多
关键词 Fe-based nanocrystalline alloy Cu-cluster Pre-existingα-Fe nanoparticle Crystallization behavior Soft magnetic property
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Influence ofβ-nucleating Compound Agents on the Mechanical Properties and Crystallization Behavior of Polypropylene Random Copolymer 认领 引用 被引量：5
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作者 谷亚新 LIU Yunxue +3 位作者 FAN Zhaorong GUI Jianfeng 刘鹏 WANG Hongmei 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2023年第1期237-243,共7页
A novel polypropylene random(PPR)composite materials with optimized properties was developed by addingβ-nucleating compound agents(rare earth complex WBG-2 and aryl amide derivative TMB-5)and ternary compound modifie... A novel polypropylene random(PPR)composite materials with optimized properties was developed by addingβ-nucleating compound agents(rare earth complex WBG-2 and aryl amide derivative TMB-5)and ternary compound modifier(TPE/WBG-2/CaCO3).The effects of differentβ-nucleating agents and ternary compound modifier on the mechanical properties and crystallization behavior of PPR were analyzed.The results show that,compared with pure PPR materials,both WBG-2 and TMB-5 could significantly improve the impact strength of PPR.The crystallization temperature of PPR increased with the addition ofβ-nucleating agent.The modified PPR prepared with ternary compound modifier showed the most excellent comprehensive properties. 展开更多
关键词 polypropylene random copolymer β-nucleating agent impact strength crystallization behavior
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CRYSTALLIZATION BEHAVIOR AND MORPHOLOGY OF ONE-STEP REACTION COMPATIBILIZED MICROFIBRILLAR REINFORCED ISOTACTIC POLYPROPYLENE/POLY(ETHYLENE TEREPHTHALATE)(iPP/PET)BLENDS 认领 引用 被引量：6
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作者 Ling Xu Gan-ji Zhong +1 位作者 Xu Ji Zhong-ming Li 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2011年第5期540-551,共12页
One-step reaction compatibilized microfibrillar reinforced iPP/PET blends(CMRB)were successfully prepared through a"slit extrusion-hot stretching-quenching"process.Crystallization behavior and morphology of ... One-step reaction compatibilized microfibrillar reinforced iPP/PET blends(CMRB)were successfully prepared through a"slit extrusion-hot stretching-quenching"process.Crystallization behavior and morphology of CMRB were systematically investigated.Scanning electronic microscopy(SEM)observations showed blurry interface of compatibilized common blend(CCB).The crystallization behavior of neat iPP,CCB,microfibrillar reinforced iPP/PET blend(MRB)and CMRB was investigated by differential scanning calorimetry(DSC)and polarized optical microscopy(POM).The increase of crystallization temperature and crystallization rate during nonisothermal crystallization process indicated both PET particles and mierofibrils could serve as nucleating agents and PET microfibrils exhibited higher heterogeneous nucleation ability,which were also vividly revealed by results of POM.Compared with MRB sample,CMRB sample has lower crystallization temperature due to existence of PET microfibrils with smaller aspect ratio and wider distribution.In addition,since in situ compatibilizer tends to stay in the interphase,it could also hinder the diffusion ofiPP molecules to the surface of PET phase,leading to decrease of crystallization rate.Two-dimensional wide-angle X-ray diffi:action(2D-WAXD)was preformed to characterize the crystalline structure of the samples by injection molding,and it was found that well-developed PET microfibrils contained in MRB sample promoted formation of t-phase of/PP. 展开更多
关键词 Isotactic polypropylene Poly(ethylene terephthalate) In situ compatibilization Microfibrillar reinforced blends Crystallization behavior.
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Ultrahigh energy density in dielectric nanocomposites by modulating nanofiller orientation and polymer crystallization behavior 认领 引用 被引量：6
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作者 Ru Guo Hang Luo +6 位作者 Di Zhai Zhida Xiao Haoran Xie Yuan Liu Fan Wang Xun Jiang Dou Zhang 《Advanced Powder Materials》 2024年第5期1-10,共10页
High-energy density dielectrics for electrostatic capacitors are in urgent demand for advanced electronics and electrical power systems.Poly(vinylidene fluoride)(PVDF)based nanocomposites have attracted remarkable att... High-energy density dielectrics for electrostatic capacitors are in urgent demand for advanced electronics and electrical power systems.Poly(vinylidene fluoride)(PVDF)based nanocomposites have attracted remarkable attention by intrinsic high polarization,flexibility,low density,and outstanding processability.However,it is still challenging to achieve significant improvement in energy density due to the common contradictions between electric polarization and breakdown strength.Here,we proposed a novel facile strategy that simultaneously achieves the construction of in-plane oriented BaTiO3 nanowires and crystallization modulation of PVDF matrix via an in-situ uniaxial stretch process.The polar phase transition and enhanced Young's modulus facilitate the synergetic improvement of electric polarization and voltage endurance capability for PVDF matrix.Additionally,the aligned distribution of nanowires could reduce the contact probability of nanowire tips,thus alleviating electric field concentration and hindering the conductive path.Finally,a record high energy density of 38.3 J/cm3 and 40.9 J/cm3 are achieved for single layer and optimized sandwich-structured nanocomposite,respectively.This work provides a unique structural design and universal method for dielectric nanocomposites with ultrahigh energy density,which presents a promising prospect of practical application for modern energy storage systems. 展开更多
关键词 Dielectrics Energy storage Poly(vinylidene fluoride) BaTiO3 nanowire Crystallization behavior
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Controllable Synthesis of a Well-defined Polypropylene grafted Silica Nanoparticles and Its Effect on Crystallization Behavior of Polypropylene 认领 引用 被引量：3
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作者 Wei-Long Ju Shao-Fan Li +1 位作者 Yun-Lan Su Du-Jin Wang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2022年第11期1411-1421,共11页
Well-defined polypropylene grafted silica nanoparticles(PP-g-SiO2)were prepared through the reaction of maleic anhydride grafted polypropylene(PP-g-MAH)with amino-functionalized silica(SiO2-NH2)by the'gra... Well-defined polypropylene grafted silica nanoparticles(PP-g-SiO2)were prepared through the reaction of maleic anhydride grafted polypropylene(PP-g-MAH)with amino-functionalized silica(SiO2-NH2)by the'grafting-to'method.The grafting density of PP-g-SiO2 is found to be controlled by the concentration of silane coupling agent 3-[2-(2-aminoethylamino)ethyl amino]propyl trimethoxy silane(TAMS).The maximum grafting density of grafted PP-g-MAH chains with molecular weight of 9100 g/mol could reach 0.34 chainsm~2,when the critical concentration of TAMS was 0.0194 mol/L.The critical concentration of TAMS can be explained by the maximum amounts of primary amino groups,which can totally react with PP-g-MAH on the surface of SiO2-NH2,when the silane monolayer is formed.The synthesized PP-g-SiO2with different molecular weights was mixed with PP by solution mixing to form a series of nanocomposites.The crystallization temperature(Tc)of nanocomposites increased significantly with the particle loading.The PP-g-SiO2 with high molecular weight of grafted chains exhibits a high nucleation ability at 1 wt%nanoparticle loading in PP/PP-g-SiO2nanocomposites.In summary,we provide an effective method to synthesize the well-defined PP-g-SiO2with controlled grafting density,which shows excellent nucleation ability. 展开更多
关键词 Polypropylene grafted silica nanoparticles Grafting density Grafting to Crystallization behavior
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HYDROGEN-BONDING INDUCED CHANGE OF CRYSTALLIZATION BEHAVIOR OF POLY(BUTYLENE SUCCINATE) IN ITS MIXTURES WITH BISPHENOL A 认领 引用 被引量：2
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作者 罗发亮 Fa-hai Luo +5 位作者 Qian Xing Xiu-qin Zhang Hong-qiao Jiao Min Yao Chun-tao Luo 王笃金 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2013年第12期1685-1696,共12页
In the present work, the blend of poly（butylene succinate） （PBS） and bisphenol A （BPA） was prepared by solution mixing, and the intermolecular interactions between the two components were characterized by a comb... In the present work, the blend of poly（butylene succinate） （PBS） and bisphenol A （BPA） was prepared by solution mixing, and the intermolecular interactions between the two components were characterized by a combination of nuclear magnetic resonance （NMR） and Fourier transform infrared spectroscopy （FTIR）. The results showed that intermolecular hydrogen-bonding forms between the carbonyl group of PBS and phenol hydroxyl of BPA. With the increase of BPA content, more hydrogen bonds were formed. The effect of hydrogen bonding on the crystallization behavior of PBS was investigated by differential scanning calorimetry （DSC） and polarized optical microscopy （POM）. The results showed that the overall isothermal crystallization kinetics and the spherulite growth rate of PBS decrease with the increase of BPA content, while the PBS spherulite size increases with BPA content. 展开更多
关键词 Poly（butylene succinate） Bisphenol A Hydrogen bonding Crystallization behavior.
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The Crystallization Behavior and Stability of Chromite Synthesized in Chromium-Containing Wastewater at Room Temperature 认领 引用 被引量：1
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作者 Jin-Fang Lv Ying-Cong Quan +2 位作者 Xiong Tong Yongjun Peng Yong-Xing Zheng 《Engineering》 SCIE EI CAS CSCD 2022年第2期67-76,共10页
The ferrite process can not only purify wastewater containing heavy metal ions but also recycle valuable metals from wastewater. Therefore, it is considered a promising technology to treat chromiumcontaining wastewate... The ferrite process can not only purify wastewater containing heavy metal ions but also recycle valuable metals from wastewater. Therefore, it is considered a promising technology to treat chromiumcontaining wastewater. However, the process has not been extensively applied in industry due to its high synthesis temperature. In this paper, the feasibility of chromite synthesis at room temperature was comprehensively studied. The effects of critical factors on the effluent quality and the crystallization behavior and stability of the synthetic products were investigated. Results showed that the removal ratio of chromium from wastewater was over 99.0%, and the chromium concentration in the supernatant reached the sewage discharge standard after undergoing the ferrite process at room temperature. Increases in the aeration rate, stirring rate, and reaction time were favorable for the formation of stable chromite. The particles obtained by the ferrite process at room temperature were characterized by a compact structure, and the maximum size of the particles reached 52 μm. Chromium gradually entered the spinel crystal structure during the synthesis process, and the molecular formula of the synthetic chromite might be Fe3-xCrxO4, in which x was approximately 0.30. The path of the microscopic reaction was proposed to illuminate the synthesis mechanism of chromite under room temperature conditions. The present study has laid the foundation for the industrial application of the ferrite process in the purification and utilization of chromium-containing wastewater. 展开更多
关键词 Chromium-containing wastewater Synthesis of chromite Room temperature Crystallization behavior Stability
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Crystallization Behavior of Nd_2O_3 Doped Na_2O–CaO–SiO_2 Laser Glass-ceramics 认领 引用 被引量：4
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作者 Shuming Wang Fenghua Kuang +2 位作者 Dazhan Zhang Xu Zhou Minghui Tang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2015年第11期1158-1160,共3页
For the desirable laser optical property, transition metals or rare-earths are always doped into parent glasses as active ions, and this doping will affect the crystallization of the precursor glasses inevitably. In t... For the desirable laser optical property, transition metals or rare-earths are always doped into parent glasses as active ions, and this doping will affect the crystallization of the precursor glasses inevitably. In this work, crystallization behavior of NaO-CaO-SiO2 system glasses doped with Nd2O3 was investigated. The crystallization kinetic parameters including the crystallization apparent activation energy （E） and the Avrami parameter （n） were also measured. The results show that the NaO-CaO-SiO2 system glassceramics with the NaxCa2Si3O9 crystal as primary phase can be highly crystalized as above 90%. The Nd2O3 doping has a significant influence on the crystallization apparent activation energy and the Avrami parameter, which affect the crystallization behavior and morphology of the transparent glass-ceramics of this system. 展开更多
关键词 Crystallization behavior Activation energy Transparent Laser glass-ceramics
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Influence of Carbon Nanofiber Addition on Mechanical Properties and Crystallization Behavior of Polypropylene 认领 引用 被引量：1
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作者 Xin TONG Yong CHEN Huiming CHENG 《Journal of Materials Science & Technology》 SCIE EI CAS 2005年第5期686-690,共5页
Carbon nanofiber （CNF）-reinforced polypropylene （CNF/PP） composites with different CNF contents were prepared by melt mixing, and the mechanical properties and crystallization behavior of the CNF/PP composites obt... Carbon nanofiber （CNF）-reinforced polypropylene （CNF/PP） composites with different CNF contents were prepared by melt mixing, and the mechanical properties and crystallization behavior of the CNF/PP composites obtained were investigated. It was found that the tensile modulus of the composites was increased with the addition of CNFs, but their elongation at break and fracture strain energy were decreased, while the tensile strength of the composites was firstly increased and then decreased due to the agglomeration of CNFs at higher loading. Nonisothermal crystallization analysis showed that the CNFs played a role as nucleating agent in PP matrix, which led to increment in the crystallization rate and the degree of crystallinity of PP. Moreover, X-ray diffraction studies showed that the CNFs incorporated in the PP matrix favored the growth of （040）-oriented PP crystals. With the increase in the CNF content, the nucleating and orientation roles of the CNFs were obviously enhanced. 展开更多
关键词 Carbon nanofibers Composites Mechanical properties Crystallization behavior
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Crystallization Behavior and Thermal Properties of PP/MgAl LDH Nanocomposites Prepared in Non-polar Solution 认领 引用 被引量：1
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作者 CUI Zhe ZHANG Guo-ying QU Bao-jun 《Chemical Research in Chinese Universities》 SCIE CAS 2010年第1期152-156,共5页
Polypropylene(PP)/MgAl layered double hydroxide(MgAl LDH)nanocomposites were synthesized by refluxing PP and dodecyl sulfate-intercalated MgAI LDH[MgAI(DS)]in non-polar xylene.Their structure,thermal and crystallizati... Polypropylene(PP)/MgAl layered double hydroxide(MgAl LDH)nanocomposites were synthesized by refluxing PP and dodecyl sulfate-intercalated MgAI LDH[MgAI(DS)]in non-polar xylene.Their structure,thermal and crystallization properties were studied via X-ray diffraction(XRD),transmission electron microscopy(TEM),thermogravimetric analysis(TGA),differential scanning calorimetry(DSC),and polarized light microscopy(PLM).The nanoscaled dispersion of MgAI(DS)nanolayeres in the PP matrix was verified by the disappearance of the d(003)XRD diffraction peak of MgAI(DS)and observation of TEM image.The DSC data show that the SDS/LDH inorganic components negatively affect the crystallization properties of PP and decrease the size of PP sphcrulites because the inorganic components act as additional nuclei.The PP/MgA1 LDH nanocomposites have a faster charring progress in a temperature range of 250--430℃and a better thermal stability above 320℃than pure PP. 展开更多
关键词 Layered doubled hydroxide Polypropylene Nanocomposite Thermal property Crystallization behavior
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Study on Morphology and Non-isothermal Crystallization Behavior of Poly(phenylene sulfide)/Poly(ethylene-co-cyclo-hexane 1,4-dimethanol terephthalate) Blend 认领 引用 被引量：1
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作者 Shi Jun Chen Yanming Chen Ying 《China Petroleum Processing & Petrochemical Technology》 CAS 2010年第1期61-66,共6页
A binary alloy consisting of poly（phenylene-sulfide） （PPS）/poly（ethylene terephthalate-co-l,4- cyclohexanedimethanol） （PETG） was prepared by the melt blending technology using a twin-screw extruder. The morpho... A binary alloy consisting of poly（phenylene-sulfide） （PPS）/poly（ethylene terephthalate-co-l,4- cyclohexanedimethanol） （PETG） was prepared by the melt blending technology using a twin-screw extruder. The morphology and crystallization behavior of the alloy material were investigated by means of SEM, POM and DSC. The SEM study of the alloy samples revealed that PPS and PETG comprised an incompatible system and the interface structure of two phases could be observed distinctly when the composition of the binary alloy was being changed. The POM results had revealed that incorporation of PETG into PPS could lead to formation of larger spherulite crystals in the course of PPS crystallization, but small and grainy spherulite crystals appeared with further increase in the PETG concentration. The DSC analyses revealed that addition of PETG to the alloy composition could shift the PPS crystallization temperature towards the high-temperature region. 展开更多
关键词 PETG PPS alloy morphology crystallization behavior
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Effect of yttrium on thermal stability and crystallization behavior of Nd60Fe20Al10Ni10 amorphous alloys 认领 引用 被引量：3
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作者 张莎莎 田学雷 孔凡利 《Journal of Rare Earths》 SCIE EI CAS 2008年第5期735-740,共6页
The effect of yttrium on the thermal stability and crystallization behavior of Nd-Fe-Al-Ni amorphous alloys was investigated using X-ray diffraction （XRD）, differential scanning calorimeter （DSC）, and transmission... The effect of yttrium on the thermal stability and crystallization behavior of Nd-Fe-Al-Ni amorphous alloys was investigated using X-ray diffraction （XRD）, differential scanning calorimeter （DSC）, and transmission electron microscopy （TEM）.The results indicated that the as-cast Nd60Fe20Al10Ni10-xYx（X=-0, 2） amorphous alloys were fabricated with some quenched-in crystals, which could be restrained by Y. With the effect of yttrium, both the crystallization temperature and exothermic peak shifted to higher temperatures, illustrating that the thermal stability could be improved. The addition of Y changed the crystallization process and final crystallization results. Moreover, the crystallites in the amorphous matrix became more homogeneous and smaller. Meanwhile, Y was useful for the passivation of oxygen in chemistry and restrained the negative effect of oxygen. The activation energies of the start of crystallization and peaking were 1.21 and 1.16 eV, respectively, according to the Kissinger equation. 展开更多
关键词 Nd-based amorphous alloy quenched-in crystals thermal stability crystallization behavior activation energy rare earths
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Effect of nanocomposite as pour point depressant on the cold flow properties and crystallization behavior of diesel fuel 认领 引用 被引量：1
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作者 Yuan Xue Fengfei Chen +3 位作者 Bin Sun Hualin Lin Bin Dai Sheng Han 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第5期2677-2680,共4页
The high effective nano-hybrid pour point depressant(PPD)has attracted extensive attention for its po-tential application in improving the cold flow properties of diesel fuel.In this paper,the nano-hybrid PPD was prep... The high effective nano-hybrid pour point depressant(PPD)has attracted extensive attention for its po-tential application in improving the cold flow properties of diesel fuel.In this paper,the nano-hybrid PPD was prepared by melt-blending method using three different alkyl chain lengths(i.e.,tetradecyl,hexade-cyl,and octodecyl)of n-alkyl methacrylate-maleic anhydride copolymers(R 1 MC-MA,R 1=C14,C16,C18)and SiO2nanoparticles.The effect of those nano-hybrid PPDs on the cold filter plugging point(CFPP)and solidifying point(SP)depressing of diesel fuel were studied.Results indicated that nano-hybrid PPD showed much better performance on diesel fuel.The diesel fuel treated with 0.2 wt%C14MC-MA/SiO2nano-hybrid PPD exhibited the best depression in CFPP and SP by 6℃ and 18℃,respectively,which higher than that of single C 14 MC-MA.Viscosity-temperature curves and polarized optical microscopy were conducted to explore the performance mechanism;and results presented that nano-hybrid PPD of C14MC-MA/SiO2could effectively lower the low-temperature viscosity,and modify the crystallization behavior and crystal morphology of diesel.Therefore,the cold flow properties of diesel were significantly improved. 展开更多
关键词 Diesel fuel Pour point depressant Nano-hybrid Cold flow properties Crystallization behavior
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Crystallization behavior of Fe78Si13B_9 metallic glass under high magnetic field 认领 引用 被引量：1
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作者 Yuanfei Yu Baozhu Liu Min Qi 《Journal of University of Science and Technology Beijing》 2008年第5期600-604,共5页
The effects of high magnetic field on the crystallization behavior of the Fe78Si13B9 metallic glass ribbon were studied.The samples were isothermal annealed for 30 min under high magnetic field and no field,respective... The effects of high magnetic field on the crystallization behavior of the Fe78Si13B9 metallic glass ribbon were studied.The samples were isothermal annealed for 30 min under high magnetic field and no field,respectively.Microstructure transformation during crystallization was identified by X-ray diffraction and transmission electron microscopy.It was found that the crystallizations of Fe78Si13B9 metallic glass processed under different conditions were that the precipitation of dendriteα-Fe(Si)and spherulite(Fe,Si)3B phases forms amorphous matrix and then the metastable(Fe,Si)3B phase transforms into the stable Fe2B phase.The grain size of the crystals is smaller and more homogeneous for the isothermal annealed samples under high magnetic field in comparison with that under no field indicating that the crystallization behavior of Fe78Si13B9 metallic glass is suppressed by high magnetic field. 展开更多
关键词 metallic glass high magnetic field isothermal annealing crystallization behavior
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Confined Crystallization Behaviors of Cross-linked Comb-like Copolymers 认领 引用
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作者 Xian-jing Gong 施德安 +4 位作者 Ying-kui Yang Tao Jiang Yan-feng Meng Robert K.Y.Li 蒋世春 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2016年第8期1039-1046,共8页
Cross-linked PEG-based copolymers were obtained via synthesis of polyethylene glycol （PEG） and methoxy polyethylene glycol （MPEG） by the bridging and/or cross-linking agent of 2,4-tolylene diisocyanate （TDI） and... Cross-linked PEG-based copolymers were obtained via synthesis of polyethylene glycol （PEG） and methoxy polyethylene glycol （MPEG） by the bridging and/or cross-linking agent of 2,4-tolylene diisocyanate （TDI） and/or hexamethylene-l,6-diisocyanate homopolymer （HDI trimer）. The effects on the crystallization behaviors of the samples could be found with the changes in molecular weight of MC-PEG and molecular weight of SC-PEG in certain cross-linked density. It is revealed that the samples appear not to crystallize when the molecular weight of MC-PEG and SC-PEG are 1000 g/mol or less than that. The samples begin to crystallize when the molecular weight of either MC-PEG or SC-PEG reaches 2000 g/mol. The crystallinity of crystallized MC-PEG decreases with the increasing molecular weight of uncrystallized SC-PEG and the crystallinity of crystallized SC-PEG declines with the rise of molecular weight of uncrystallizable MC-PEG. The chains of SC-PEG （M_n = 2000 g/mol） can fold and align easilier than those of MC-PEG （M_n = 2000 g/mol）, when the content of PEG is the same. 展开更多
关键词 PEG-based copolymers Cross-linking Comb-like Confined crystallization behavior.
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STUDIES ON THE MECHANICAL PROPERTIES AND CRYSTALLIZATION BEHAVIOR OF POLYETHYLENE COMPOSITES 认领 引用
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作者 朱进 欧玉春 冯宇鹏 《Chinese Journal of Polymer Science》 SCIE EI CAS 1995年第3期218-227,共10页
The effects of interfacial modifier on the mechanical, dynamic mechanical properties and crystallization behavior of the polyethylene composites were investigated in the present paper. It was found that the interfacia... The effects of interfacial modifier on the mechanical, dynamic mechanical properties and crystallization behavior of the polyethylene composites were investigated in the present paper. It was found that the interfacial modifer significantly improved the mechanical properties, influenced the dynamic mechanical spectra and slightly changed the crystallization behavior. The results showed that the interfacial modifier changed the dispersion state of dispersed phase of the composites, resulting in different phase structure, which was the major reason leading to different mechanical and crystallization properties. 展开更多
关键词 HDPE INTERFACIAL MODIFIER MECHANICAL PROPERTY CRYSTALLIZATION BEHAVIOR
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Crystallization Behavior of Polymer Derived Silicon Carbide Sintered Through Microwave Heating Technique 认领 引用
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作者 熊俊 HUANG Qing 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第6期1368-1373,共6页
A self-crosslinkable liquid highly branched polycarbosilane（LHBPCS） with 5.07% vinyl group and a C/Si ratio of 1.33 was used as the precursor to prepare Si C ceramic material. Microwave heating technique and convent... A self-crosslinkable liquid highly branched polycarbosilane（LHBPCS） with 5.07% vinyl group and a C/Si ratio of 1.33 was used as the precursor to prepare Si C ceramic material. Microwave heating technique and conventional heating method were applied for the heating treatment process. It was found that, compared with conventional heating method, microwave heating technique could enhance the crystallinity of Si C ceramic material with small grain size at much lower curing temperature and within shorter time. In addition, the SiO_2 additive could lead to less α-Si C and excess carbon, but worsen the crystallinity of β-Si C in the final samples. 展开更多
关键词 liquid highly branched polycarbosi＇ane microwave heating crystallization behavior β-SiC
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MISCIBILITY AND CRYSTALLIZATION BEHAVIOR OF BIODEGRADABLE BLEND OF POLY(β—HYDROXYBUTYRATE)AND POLY(D,L—LACTIDE)—CO—POLY(ETHYLENE GLYCOL) 认领 引用
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作者 Xian Mo DENG Lian Lai ZHANG Cheng Dong XIONG Chengdu Institute of Organic Chemistry,Academia Sinica,Chewgdu 610041 《Chinese Chemical Letters》 SCIE EI CAS 1993年第3期265-268,共4页
Studies on the miscibility of PHB/PELA blends showed that PHB and PELA were miscible in amorphous state.The crystallization behavior of PHB in the blend was strongly de- pendent on the addition of PELA component.
关键词 PELA HYDROXYBUTYRATE)AND POLY LACTIDE MISCIBILITY AND CRYSTALLIZATION BEHAVIOR OF BIODEGRADABLE BLEND OF POLY PHB D,L CO
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The Crystallization Behavior of L-Poly(lactic acid)/Polypropylene Blends:The Acceleration for Both L-Poly(lactic acid)and Polypropylene 认领 引用 被引量：1
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作者 Shuang-Cheng Li Wei-Jia Zhou +4 位作者 Wen-Jie Wu Jun Shao Shui-Liang Chen Hao-Qing Hou Sheng Xiang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2024年第6期775-786,共12页
For a polymer/polymer dismissible blend with two crystallizable components,the crystallization behavior of different components and the reciprocal influences between different crystals are interesting and important,bu... For a polymer/polymer dismissible blend with two crystallizable components,the crystallization behavior of different components and the reciprocal influences between different crystals are interesting and important,but did not investigate in detail.In this study,the L-poly(lactic acid)/polypropylene(PLLA/PP)blends with different weight ratios were prepared by melt mixing and the crystallization behavior of the blends were investigated.Results showed that the crystalline structures of PLLA and PP were not altered by the composition.For the crystallization of PLLA,both the diffusion of chain segments and crystallization rate were enhanced under the existence of PP crystals.For the crystallization of PP,its crystallization rate was depressed under the existence of amorphous PLLA molecular chains.When the PP crystallized from the existence of PLLA crystals,although the diffusion rate of PP was reduced by PLLA crystals,the nucleation positions were obviously enhanced,which accelerated the formation of PP crystals.This investigation would supply more basic data for the application of PLLA/PP blend. 展开更多
关键词 L-poly(lactic acid) Polypropylene Blends Crystalization behavior Crystallization acceleration
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