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OALib Journal期刊
ISSN: 2333-9721
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MWCNTs与疏水纳米SiO2填充PMMA/PS共混物的导电与动态流变行为
DOI: 10.3724/SP.J.1105.2013.12155, PP. 88-94
Keywords: 多壁碳纳米管,疏水纳米二氧化硅,聚苯乙烯/聚甲基丙烯酸甲酯共混物,逾渗,动态流变特性
Abstract:
以多壁碳纳米管(MWCNTs)为导电填料、疏水纳米二氧化硅(SiO2)为非导电填料,填充不相容聚甲基丙烯酸甲酯(PMMA)/聚苯乙烯(PS)(1/1,V/V)共混物,制备(PMMA/SiO2)/(PS/MWCNTs)四元导电高分子复合材料(CPC),研究其导电逾渗与动态流变行为,并与PMMA/(PS/MWCNTs)三元CPC进行对比.发现三元、四元CPC具有类似的导电逾渗行为,且逾渗阈值显著低于PS/MWCNTs二元CPC.在四元CPC中,SiO2粒子可细化相区尺寸,提高熔体模量,但不影响熔体热处理过程中的依时性动态导电逾渗行为.MWCNTs与SiO2均显著影响熔体热处理中的依时性模量逾渗行为,分别缩短、延长四元CPC相粗化起始时间,但均延长相粗化时间区间.
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