SANS INVESTIGATIONS OF TOPOLOGICAL CONSTRAINTS AND MICROSCOPIC DEFORMATIONS IN RUBBERELASTIC NETWORKS

被引：35

作者：

STRAUBE, E ^{[1
]}

URBAN, V ^{[1
]}

PYCKHOUTHINTZEN, W ^{[1
]}

RICHTER, D ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST FESTKORPERFORSCH, D-52425 JULICH, GERMANY

来源：

MACROMOLECULES | 1994年 / 27卷 / 26期

关键词：

D O I：

10.1021/ma00104a025

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The form factor of a labeled chain randomly cross-linked into a network in a tubelike approach is presented. Within a harmonic approximation for the constraining potential, the action of cross-links and entanglements is modeled by an effective tube, which is deformation dependent. The only parameters of the model are the reduced microscopic deformation, following a power law in the strain, and the diameter of the tube; which is inversely proportional to the strength of the constraints. First experimental results on polybutadiene networks with varying cross-link density are discussed. The conclusions drawn confirm a less than affine deformation at the molecular level while segmental fluctuations are found to be unperturbed despite the network topology and of the same size as obtained from theology.

引用

页码：7681 / 7688

页数：8

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