Continuous extrusion and tensile strength of self-reinforced HDPE/UHMWPE sheet

被引:26
作者
Chen, Jun [1 ]
Yang, Wei [1 ]
Yu, Guo-ping [1 ]
Wang, Min [1 ]
Ni, Hai-ying [1 ]
Shen, Kai-zhi [1 ]
机构
[1] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China
基金
中国国家自然科学基金;
关键词
tensile strength; morphology; self-reinforcement; HDPE; UHMWPE;
D O I
10.1016/j.jmatprotec.2007.08.055
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A specially designed fish-tail shaped extrusion die was used to continuously extrude self-reinforcing sheet of HDPE/UHMWPE. The result indicated that under conventional extrusion conditions, the tensile strength of extruded sheet was comparable to conventional molded HDPE samples and was almost the same in both MD (machine direction) and TD (transverse direction) directions. While at temperatures slightly above the melting point of HDPE, compared with conventionally extruded sheet, above 6-fold and 3-fold improvements were obtained in the MD and TD direction for HDPE/UHMWPE (I) system in the optimum extrusion windows of 15-30 MPa extrusion pressure, the die temperature ranging from 126 degrees C to 137 degrees C and a rotation speed of 15 rpm. For HDPE/UHMWPE (III) system, in the optimum processing windows, that is, 15-30 MPa extrusion pressure, 131-139 degrees C die temperature and 15 rpm extruder rotation speed, about 5-fold and 2-3-fold improvements were obtained in the MD and TD direction compared with conventionally extruded sheet, respectively. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:165 / 169
页数:5
相关论文
共 20 条