Morphology and mechanical properties of blown films of a low-density polyethylene/linear low-density polyethylene blend

被引：49

作者：

Lu, JJ ^{[1
]}

Sue, HJ ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Mech Engn, Polymer Technol Ctr, College Stn, TX 77843 USA

来源：

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 2002年 / 40卷 / 06期

关键词：

low-density polyethylene (LDPE); linear low-density polyethylene (LLDPE); blown films; morphology; structure-property relations;

D O I：

10.1002/polb.10115

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The morphologies of films blown from a low-density polyethylene (LDPE), a linear low-density polyethylene (LLDPE), and their blend have been characterized and compared using transmission electron microscopy, small-angle X-ray scattering, infrared dichroism, and thermal shrinkage techniques. The blending has a significant effect on film morphology. Under similar processing conditions, the LLDPE film has a relatively random crystal orientation. The film made from the LDPE/LLDPE blend possesses the highest degree of crystal orientation. However, the LDPE film has the greatest amorphous phase orientation. A mechanism is proposed to account for this unusual phenomenon. Cocrystallization between LDPE and LLDPE occurs in the blowing process of the LDPE and LLDPE blend. The structure-property relationship is also discussed. (C) 2002 Wiley Periodicals, Inc.

引用

页码：507 / 518

页数：12

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