RELAXATION OF RANDOMLY CROSS-LINKED POLYMER MELTS

被引：88

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

页码：3531 / 3534

页数：4

共 18 条

[1]

[Anonymous], 1980, VISCOELASTIC PROPERT

[2]

[Anonymous], 1987, COMPUTER SIMULATION, DOI DOI 10.2307/2938686

[3]

Bird RB., 1977, DYNAMICS POLYM LIQUI

[4] A THEORETICAL BASIS FOR VISCOELASTIC RELAXATION OF ELASTOMERS IN THE LONG-TIME LIMIT [J].