Comparison of polymer dynamics between entanglements and covalent cross-links

被引：23
|
作者：
Nicolai, T [1 ]
Prochazka, F [1 ]
Durand, D [1 ]
机构：
[1] Univ Maine, CNRS, UMR, F-72085 Le Mans 9, France
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 04期
关键词：
D O I：
10.1103/PhysRevLett.82.863
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigated the polymer backbone dynamics of entangled and cross-linked polymer melts using dielectric spectroscopy (DS) and rheology. The entangled and cross-linked melts were prepared by end-linking linear and three armed poly(oxypropylene), respectively. Because of dipole inversion at the junctions DS is sensitive only to end-to-end distance fluctuations of the polymer sections between entanglements or cross-links. DS shows that the dynamics between covalent cross links and entanglements are identical. The dipole relaxation is strongly modified by end-linking.
引用
收藏
页码：863 / 866
页数：4
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