振动场中HDPE／UHMWPE及其吹塑薄膜的性能.pdf

现代塑料加
2010年第22卷第1期
MODERN PLASTICS PROCESSING AND APPLICATIONS
振动场中HDPE/ UHMWPE及其吹塑薄膜的性能
左建东刘述梅2赵建青潘映雪彭响方
(1.深圳大学材料科学与工程学院深圳市特种功能材料重点实验室,广东深圳,518060
2.华南理工大学材料科学与工程学院,广东广州,510640;
3.华南理工大学聚合物新型成型装备国家工程研究中心,广东广州,510640)
摘要:利用电磁振动挤出机制备高密度聚乙烯/超高相对分子质量聚乙烯(HDPE-/ UHMWPE)共混物,对比了静态和动
态下共混吹塑薄膜的力学性能及薄膜的表观,用振动毛细管流变仪测定了静态和动态下共混物的流变行为,用差示量热扫
描仪(DSC◇)探讨了共混物的结晶行为。结果表明,电磁振动挤出机制备的共混物吹制薄膜的力学性能均比稳态下的高;振
动态时共混物的结晶度高,结晶峰型更为尖锐;振动力场中的共混物的表观粘度低于稳态的,振动力场改善HDPE/UHM
WPE共混物的成型加工性能。
关词:电磁动超高相对分子质量聚乙烯共结品高密度囊乙蟒薄膜性能
HDPE/UHMWPE in Vibration Field and Property of Its Blown Film
Zuo Jiandong! Liu Shumei Zhao Jianging' Pan Yingxue Peng Xiangfang
1. Shenzhen Key Laboratory of Special Functional Materials, College of Materials Science and
Engineering, Shenzhen University, Shenzhen, Guangdong, 518060; 2. College of Materials
Science and Engineering, South China University of Technology, Guangzhou, Guangdong
510640; 3. National Engineering Research Center of Novel Equipment for Polymer
Processing, South China University of Technology, Guangzhou, Guangdong, 510640)
Abstract: HDPE/UHMWPE blends were prepared by the electromagnetism dynamic ex
truder. The mechanical properties and surface morphology of the blown film of the HDPE/
UHMWPE blends on the vibration state and the stable state were contrasted. Moreover
rheological behavior of the blends on the vibration state and the stable state was determined
by vibration capillary rheometer. The crystallization behavior of the blends was discussed by
DSC. The results show that the mechanical properties of the blown films of the blends on the
vibration state obviously are better than those of the blends on the stable state. The blends
made on the vibration state have higher crystallinity and more acute crystallization peak than
those of the blends made on the stable state. The apparent viscosity of the blends in the vi-
bration field is lower than that of the blends on the stable state. Vibration filed improves
processing performance of the HDPE/UHMWPE blends.
Key words: electromagnetism vibration; ultra-high molecular weight polyethylene; co-
crystallization; high density polyethylene; film; property
高密度聚乙烯/超高分子量聚乙烯
(HDPE/ UHMWPE)共混物在制备的过程中,
收稿日期:2009-01-05;修改稿收到日期:2009-10-05
能耗较高。已有的研究资料归表明,振动力场的
作者简介:左建东,女,河南省方城县人,博士,讲师。E
mail:qingfeng_9709@126.com
引人可降低熔体的表观粘度和挤出压力,使分子
基金项目:广州市科技攻关计划项目(2006Z2-D2031)
链在加工过程中产生更多的取向,更好地分散在
资助