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OALib Journal期刊
ISSN: 2333-9721
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特殊形态结构导电高分子复合材料的电学性能
Keywords: 复合材料,导电高分子复合材料,形态结构,逾渗阈值,正温度效应
Abstract:
？先使聚丙烯接枝马来酸酐(pp--g--mah)与炭黑(cb)反应,再与聚丙烯/尼龙6(pp/pa6)共混制备出cb位于两相界面处的pp/pa6/pp--g--mah/cb导电高分子复合材料,研究了材料的特殊结构和电学性能。结果表明,在pp/pa6/cb体系中cb粒子分布在pa6相,体系的逾渗阈值为2%;而在pp/pa6/pp--g--mah/cb体系中,cb被pp--g--mah诱导分布在两相界面处。pp/pa6两相为海岛结构时,pp/pa6/pp--g--mah/cb体系仍可导电。pp/pa6/pp--g--mah/cb体系的逾渗阈值降至1.6%,低于pp/pa6/cb体系。体系的正温度效应(ptc)强度远高于pp/pa6/cb体系,在90-135℃范围内不出现负温度效应(ntc)。pp/pa6/pp--g--mah/cb体系的电学性能归结于其特殊的界面形态结构:导电通道由位于共混物界面处的pp--g--mah和cb构建而成。
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