The effect of short chain branching on the rheological and thermal properties of olefin:: α-olefin copolymers

被引：7
|
作者：
Halász, L [1 ]
Vorster, O [1 ]
Belina, K [1 ]
机构：
[1] Tshwane Univ Technol, ZA-0001 Pretoria, South Africa
来源：
RHEOLOGICA ACTA | 2005年 / 44卷 / 04期
关键词：
olefin copolymers; short branching; rheological properties;
D O I：
10.1007/s00397-004-0427-y
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
An important method of the modification of the properties of polyethylene and polypropylene is the copolymerisation with alpha-olefins. The alpha-olefin behaves as a short branch in the structure, and the rheological and thermal properties of copolymers change significantly. A new method is suggested to evaluate the rheological and thermal properties of copolymers on the basis of homopolymer properties, by introducing a short branch degree parameter. The zero shear viscosity, plateau modulus, fractional free volume, reptation tube diameter, glass transition temperature and thermodynamical melting point were calculated.
引用
收藏
页码：427 / 433
页数：7
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