嵌段共聚聚丙烯压缩Mullins效应的研究  

Compression Mullins effect of PP-B

作　　者：张纪凯 王兆波[1] ZHANG Jikai WANG Zhaobo(College of Materials Science ＆ Engineering,Qingdao University of Science＆ Technology, Qingdao 266042, Chin)

机构地区：[1]青岛科技大学材料科学与工程学院,山东青岛266042

出　　处：《弹性体》2017年第1期14-18,共5页China Elastomerics

基　　金：山东省自然科学基金项目(ZR2012EMM002)

摘　　要：研究了嵌段共聚聚丙烯(PP-B)的压缩Mullins效应及其可逆回复。结果表明,在循环单轴压缩模式下PP-B出现显著的Mullins效应,当压缩应变一定的条件下,在第1次循环压缩时最大压缩应力和内耗均达到最大值,在第2次循环压缩时则发生大幅下降,但随后下降趋势逐渐减弱;热处理可以使Mullins效应得到一定程度的回复。The Mullins effect and the reversibility of PP-B were investigated systematically.Experimental results showed that Mullins effect could be found in the cycle uniaxial compression mode of PP-B specimen;the maximum stress and internal friction under the fixed strain were decreased obviously after the first loading-unloading while only decreased slightly at the later loading-unloading cycles.The Mul lins effect could be reversible to some extent by proper heat treatment.

关 键 词：PP-B Mullins效应 可逆回复 应力松弛 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]