RELAXATION OF RANDOMLY CROSS-LINKED POLYMER MELTS

被引：86
|
作者：
DUERING, ER
KREMER, K
GREST, GS
机构：
[1] FORSCHUNGSZENTRUM JULICH,INST FESTKORPERFORSCH,JULICH,GERMANY
[2] UNIV MINNESOTA,DEPT CHEM ENGN & MAT SCI,MINNEAPOLIS,MN 55455
[3] EXXON RES & ENGN CO,CORP RES SCI LABS,ANNANDALE,NJ 08801
来源：
PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 25期
关键词：
D O I：
10.1103/PhysRevLett.67.3531
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The dynamical properties of randomly cross-linked polymer melts, far above the vulcanization threshold, are studied using molecular-dynamics simulations. The mean-square displacements of the middle and end monomers of the chains as well as the cross-links are considered. The dynamic scattering function S(q,t) as measured by neutron spin echoes is also calculated. The average strand length between two cross-links is about 1/4 of the entanglement length of the un-cross-linked melt. By introducing a new intermonomer potential, we can explicitly test the influence of trapped entanglements. For the present system, the frozen entanglements change the plateau modulus by about 25%.
引用
收藏
页码：3531 / 3534
页数：4
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