摘要
本文考察了HDPE/SBR共混物的拉伸、耐环境应力开裂、熔体流动等性能,并用差示扫描量热、扫描电镜、相差显微镜等方法研究了共混物的结构及其与性能的关系。结果表明部分SBR链段被HDPE晶区夹持,由于SBR链很长,每个分子可穿过多个晶区和非晶区,受外力时不易从晶区拨出,从而起连接分子的作用,使HDPE的拉伸强度、断裂伸长率、耐环境应力开裂等性能明显提高。
This paper investigated the tensile, environment stress cracking, and melt flow properties of HDPE/SBR blends. Differential scanning calorimetry, scanning electronic and phase contrast microscopy were used to study the crystallization behavior and phase structure of the blends. Relation between structure and properties is discussed. Results show that parts of SBR segments were clampped by HRPE crystalline region. One SBR molecule can penetrat several crystalline and amorphous regions and present the function of tie molecule. Because SBR chain is very long, it is not easy to extract these tie molecules from the crystalline regions. Thus, tensile strength, elongation at break and environment stress cracking resistence of HDPE increase obviously.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1993年第3期84-88,共5页
Polymer Materials Science & Engineering
基金
浙江大学聚合反应工程国家重点实验室开放基金
