化学交联SBS/PE-LD共混物的形状记忆效应研究  

Shape Memory Effects of Chemically Crosslinked SBS/PE-LD Blends

作　　者：王永坤[1] 朱光明[1] 刘婷婷[1] 谢建强[1] 王坤[1] 

机构地区：[1]西北工业大学应用化学系,陕西西安710129

出　　处：《中国塑料》2013年第9期28-31,共4页China Plastics

摘　　要：分别用3种不同苯乙烯含量的苯乙烯-丁二烯共聚物（SBS）与低密度聚乙烯（PE-LD）混合制成共混物，采用过氧化苯甲酰（BPO）为引发剂，使共混物发生化学交联形成网状结构，对交联共混物的交联度进行了分析，测试了交联共混物的拉伸强度与断裂伸长率，探讨了交联共混物的形状记忆效应。结果表明，在SBS／PE_LD共混物中，随着BPO含量的增加，共混物的交联度增大；BPO含量固定时，随着SBS中丁二烯含量的增大共混物的交联度增大；随着交联度的增加，共混物的拉伸强度与断裂伸长率均下降；当BPO含量为0．5%～1．5%时，交联共混物具有良好的形状记忆效应。A series of novel shape memory blend materials were fabricated by blending three kinds of styrene butadiene copolymer （SBS） with low density polyethylene （PE-LD） and were chemically crosslinked by benzoyl peroxide （BPO）. The degree of erosslinking, tensile strength, and the elongation at break of the crosslinked blends were tested and investigated. With increasing content of BPO, the degree of crosslinking of the blend increased, in which the SBS1201/PE-LD blend gave the maximum value. As the degree of crosslinking increased, the tensile strength and break elongation decreased. Moreover, when the BPO content was 0. 5 % to 1. 5 %, the crosslinked blend exhibited good shape memory behavior.

关 键 词：低密度聚乙烯 苯乙烯-丁二烯共聚物 化学交联 形状记忆效应 力学性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]