摘要
采用差热分析和相差显微镜方法研究了超高分子量聚乙烯(UHMWPE)与低密度聚乙烯(LDPE)的机械共混物的结晶行为及其力学性能。在所采用的单螺杆挤出共混条件下,UHMWPE基本上以填料方式被分散于LDPE基体中。两组分没有共结晶发生,熔体长时间热处理可使两组分相互作用增加,UHMWPE可使LDPE的屈服强度和模量增加,辊筒共混方法得到的共混物性能优于单螺杆挤出的共混物的性能。
The crystallization and mechanical behavior of melt-blended blends of Ultrahigh-Mole-cular-weight Polyethylene (UHMWPE) and Low-Density Polyethylene (LDPE) were studied by differential thermal analysis (DTA) and phase contrast microscopy. In blends prepared by single screw method, UHMWPE particles were dispersed in LDPE matrix as if a kind of filler, no co-crystallization takes place between UHMWPE and LDPE components, long time anealing in melt state can increase the interaction between the two components. UHMWPE can increase the yield strength and modulus of LDPE, and the properties of blends prepared by two-rollmethod are better than that of blends prepared by single screw method.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1991年第3期52-55,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金
关键词
聚乙烯
共混物
UHMWPE
LDPE
结晶
polyethylene blend,ultrahigh-molecular-weight polyethylene,crystallization behavior.
