中国塑料2017，Vol.31Issue(10)：83-88,6.DOI:10.19491/j.issn.1001-9278.2017.10.015
成型方法对交联聚乙烯冲击性能与结构的影响
Effect of Formation Methods on Impact Performance and Microstructures of Crosslinked Polyethylene
任月庆 1董侠 2陈学连 2王笃金 1梁文斌2
作者信息
- 1. 北京低碳清洁能源研究所,先进材料及分析中心,北京102211
- 2. 中国科学院化学研究所,工程塑料院重点实验室,北京分子科学国家实验室,北京100190
- 折叠
摘要
Abstract
In this work,crosslinked polyethylene samples were prepared by compression molding and rotational molding methods,and then effects of molding methods on drop-weight impact strength at different temperature,crystal size,crystallinity degree and gel content at different thickness gradients of crosslinked polyethylene were investigated.The results indicated that the drop-weight impact strength of the compression-molded sample increases from 29 J/mm to 35 J/mm when test temperature was reduced from 25 ℃ to-40 ℃,but the sample kept an identical microstructure in different gradient thicknesses.For the rotational molded sample,the drop-weight impact strength at-20～25 ℃ and-40～-30 ℃ is about 29 and 1 J/mm,respectively.There is a ductile-brittle transition between-20 and-30 ℃,and the microstructures also kept an identical microstructure in different gradient thicknesses except for the innermost surface layer around 0.2 mm.The inner surface layer has a lower gel content,higher crystal size and higher crystallization degree in comparison with other gradient thicknesses.Moreover,the microstructures of the innermost surface layer dominated the drop-weight impact performance at low temperature.关键词
模压成型/滚塑成型/交联聚乙烯/微观结构Key words
compression molding/rotational molding/crosslinked polyethylene/microstructures分类
化学化工引用本文复制引用
任月庆,董侠,陈学连,王笃金,梁文斌..成型方法对交联聚乙烯冲击性能与结构的影响[J].中国塑料,2017,31(10):83-88,6.
