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接枝和交联对纳米Si02改性NR/PP共混型热塑弹性体的影响
引用本文:李志君,魏福庆.接枝和交联对纳米Si02改性NR/PP共混型热塑弹性体的影响[J].高分子学报,2006(1):43-47.
作者姓名:李志君  魏福庆
作者单位:华南热带农业大学工学院高分子材料与工程系,儋州571737
基金项目:海南省自然科学基金(基金号50302)和中国热带农业科学院华南热带农业大学自然科学基金(基金号Rykj0249)项目
摘    要:动态硫化制备纳米二氧化硅(SiO2)改性天然橡胶,聚丙烯共混型热塑性弹性体(NR/PPTPE).研究了马来酸酐,苯乙烯,过氧化二异丙苯(MAH/St/DCP)多单体“就地”熔融接枝、交联对TPE力学性能、耐溶剂性能和耐热变形性能的影响,并用SEM分析了TPE的断面形貌.结果表明:纳米SiO2和MAH/St/DCP的最佳质量分数分别为0.03和0.0375/0.0188/0.00375时,MAH/St/DCP接枝、交联改性NR/PP/纳米SiO:TPE的力学性能、耐溶剂性能和耐热变形性能最佳.MAH/St/DCP“就地”接枝、交联通过细化交联NR分散相、改善交联NR分散的均匀性和增加两相之间的共交联,使NR与PP两相界面结合强度明显提高,NR/PPTPE的综合性能得到明显的改善.

关 键 词:天然橡胶  聚丙烯  热塑性弹性体  纳米二氧化硅  接枝和交联
收稿时间:2004-08-09
修稿时间:2004-11-29

EFFECT OF GRAFTING AND CROSSLINKING ON NANO-SILICA MODIFIED NR/PP BLENDED THERMOPLASTIC ELASTOMER
LI Zhijun, WEI Fuqing.EFFECT OF GRAFTING AND CROSSLINKING ON NANO-SILICA MODIFIED NR/PP BLENDED THERMOPLASTIC ELASTOMER[J].Acta Polymerica Sinica,2006(1):43-47.
Authors:LI Zhijun  WEI Fuqing
Institution:Department of Polymer Material Science and Engineering, The South China University of Tropical Agriculture, Danzhou 571737
Abstract:Dynamic vulcanized NR/PP/nano-silica blended thermoplastic elastomer(TPE) was prepared.The effects of the modification of nano-silica and MAH/St/DCP multi-monomer melt grafting and cross-linking on the mechanical properties,the resistance to solvent and resistance to thermal distortion of TPE were investigated.SEM was used to study the morphology structure of TPE.The results showed that,the MAH/St/DCP multi-monomer melt grafted and cross-linked TPE had the best mechanical properties,resistance to solvent and resistance to thermal distortion,when the mass ratio of nano-silica was 0.03 and that of MAH/St/DCP was 0.0375/0.0188/0.00375.The compatibility and interfacial interaction between NR and PP were increased greatly by thinning the dispersive phase,improving the dispersion uniformity of NR and enhancing the co-cross-linking of the two phases.The comprehensive properties of NR/PP TPE were improved obviously.
Keywords:Natural rubber  Polypropylene  Thermoplastic elastomer  Nano-silica  Grafting and cross-linking
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