摘要
以苯乙烯-丙烯腈共聚物/聚己内酯(SAN/PCL)复合材料为基体,导电炭黑(CB)为填料,采用熔融共混的方法制备了SAN/PCL/CB纳米复合材料。考察了CB含量对SAN/PCL/CB纳米复合材料流变特性、力学性能、电学性能和微观形貌的影响。结果表明,CB的加入能够诱导体系发生相分离,随着CB含量的增加,SAN/PCL/CB纳米复合材料的储能模量曲线在低频区呈现明显的“第二平台”,表现出明显的凝胶化现象,凝胶点为6.5%。在凝胶点前后,SAN/PCL/CB纳米复合材料的力学和电学性能发生明显变化,表明力学和电学性能均与流变特性具有一定相关性。形态分析表明,CB的加入可有效降低分散相的尺寸,CB的团聚是产生流变逾渗的根本原因。
SAN/PCL/CB nanocomposites were prepared through melt blending styrene-acrylonitrile copolymer/polycaprolactone(SAN/PCL)blends with carbon black(CB).The effects of CB content on the rheological properties,mechanical properties,electrical properties and morphologies of SAN/PCL/CB nanocomposites were investigated.The results show that the addition of CB can induce the phase separation.With the increasing of CB content,the storage modulus(G′)curves of SAN/PCL/CB nanocomposites show a clear"second plateau"in the low frequency region,exhibiting the obvious gelation phenomenon,and the gel point is 6.5%.Around the gel point,the mechanical and electrical properties of SAN/PCL/CB nanocomposites change significantly,indicating that both the mechanical and electrical properties have some correlation with the rheological behaviors.Morphological analysis shows that the addition of CB can effectively reduce the sizes of the dispersed phase,and the agglomerations of CB can be attributed to the rheological percolation.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2021年第2期67-72,共6页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51373157)。
关键词
纳米复合材料
流变
相分离
力学性能
电学性能
nanocomposites
rheology
phase separation
mechanical property
conductive property
