含少量高分子量组分的HDPE共混物在复合应力场中成型管材的性能研究  

Research on Properties of Pipe Extruded by HDPE Blend Containing Small Amount of High Molecular Weight Component under Compound Stress Field

作　　者：王朝虹[1] 申开智[2] 

机构地区：[1]煤炭科学研究总院重庆研究院,重庆400037 [2]四川大学高分子科学与工程学院,四川成都610065

出　　处：《塑料科技》2008年第3期62-66,共5页Plastics Science and Technology

基　　金：国家自然科学基金(50473053;20174026)

摘　　要：将少量相对高分子量的高密度聚乙烯(HDPE)加入到相对低分子量的通用级HDPE中,在复合应力场作用下挤出制成管材。通过力学性能测试、SEM、WAXD及DSC分析对制品的性能及结构进行了表征,结果表明:在剪切或拉伸应力场中,高分子量HDPE的大分子链会成为初级晶核,促进诱导体系生成大量倾斜排列的串晶和串晶互锁结构,明显改善了管材试样周轴两向的力学性能。A small amount of high molecular weight HDPE was added into relative low molecular weight HDPE under compound stress field to extrude pipe. The property of the product was characterized by mechanical property test, SEM, WAXD and DSC analysis, the results show： under the shear or tensile stress field, the macromolecular chains of high molecular weight HDPE can be easily and stably reserved to become the preliminary linear nucleus, which promotes the generation of shish-kebab and interlocking shish-kebab of the induced system so that the mechanical properties of the pipe are improved obviously.

关 键 词：高密度聚乙烯 诱导结晶 串晶 串晶互锁 

分 类 号：TQ320.72[化学工程—合成树脂塑料工业]