CB在PET-PE复合材料中的选择分散及电性能  

Selective Distribution of CB and Electrical Properties of Poly(ethylene terephthalate)-Polyethylene Multiphase System

作　　者：董蓉[1] 李冰[1] 王若鑫[1] 杨俊[1] 周建刚[1] 郭卫红[1] 

机构地区：[1]华东理工大学高分子合金研究室超细材料制备与应用教育部重点实验室,上海200237

出　　处：《功能高分子学报》2009年第4期405-410,共6页Journal of Functional Polymers

基　　金：国家自然科学基金(20574019);国家科技支撑计划(2008BAC46B10);上海市重点学科建设项目(B502)

摘　　要：用Haake转矩流变仪制备了聚对苯二甲酸乙二酯-聚乙烯-炭黑(PET-PE-CB)复合材料。通过溶解性试验、扫描电镜测试对CB在PET-PE多相体系中的选择性分散进行了研究,考察了CB分布对电性能的影响。结果表明:CB倾向于分布在PET相,改变CB填充量、基体配比以及加料次序对CB微观分布的影响不大。当m(CB)/m(PET-PE)=0.07时,出现渗滤现象。固定炭黑含量,当PET的质量分数由20%增加到60%时,材料的体积电阻率下降了6个数量级,一次性加料更有利于形成导电通路,可以获得较低的体积电阻。Poly（ethylene terephthalate） （PET）-Polyethylene （PE）-Carbon Black（CB） composites were prepared in Haake mixer. Selective distribution of CB in multiphase system was studied by dissolved test and SEM. The influence of the selective distribution of CB on electrical properties in multiphase materials was also studied. The results indicate that CB particles do overwhelmingly localize in PET phase. Contents of CB, matrix proportion and different adding sequence have little influence on the distribution of CB. When m（CB）/m（PET-PE） is 0.07, the percolation phenomenon is appeared. The volume resistivity of PET-PE-CB composites decreases about 6 orders of magnitude when the mass fraction of PET increases from 20 % to 60 % at the same content of CB. The overall one time feoding is propitious to form the circuit network.

关 键 词：聚对苯二甲酸乙二酯 炭黑分布 体积电阻 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]