Comparison of Rheological and Mechanical Behavior of Dynamically and Statically Vulcanized PP/SBS Blends

被引：0
|
作者：
M. Ichazo
M. Hernandez
J. Gonzalez
C. Albano
N. Dominguez
机构：
[1] Universidad Simón Bolívar,Laboratorio de Polímeros, Centro de Química
[2] Departamento de Mecánica,undefined
[3] IVIC,undefined
[4] Universidad Central de Venezuela,undefined
[5] Facultad de Ingeniería,undefined
来源：
Polymer Bulletin | 2004年 / 51卷
关键词：
Sulphur; Viscosity; Peroxide; Polypropylene; Mechanical Behavior;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Rheological behavior of dynamically and statically vulcanized blends of isotatic Polypropylene (PP) and 20% wt Styrene-Butadiene-Styrene block copolymer (SBS) was studied with reference to the effect of extrusion conditions, curing agents (sulphur, peroxide) and curing times. All blends showed pseudoplastic behavior. When using sulphur, a slight increase on melt viscosity was observed, showing no differences with vulcanization method or with pre-vulcanization time. With peroxide, melt viscosity changed drastically. Dynamically vulcanized blends with sulphur showed a noticeable rise on elongation at break as well as on toughness while those statically vulcanized showed very low values on these properties.
引用
收藏
页码：419 / 427
页数：8
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