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Local order and elasticity of polymer networks with nematiclike interactions

✍ Scribed by Janusz Walasek

Book ID
105338297
Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
493 KB
Volume
28
Category
Article
ISSN
0887-6266

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✦ Synopsis

Abstract

The influence of nematiclike interactions on local order and elasticity of crosslinked polymer systems is considered. A molecular mean‐field approach is used to describe interactions between system segments. The orientation‐dependent potential is assumed to be proportional to the square of the cosine of the angle between the direction of the orienting field and the chain segment vector. The orientation factor is calculated from a self‐consistent equation, with no restrictions on the strength of intersegmental interactions. Isotropic (slightly oriented) and nematic (highly oriented) phases are observed. The influence of local order on the stress‐strain relation is derived for various values of network structural parameters (contraction coefficient, length of network chains) and the strength of segment‐segment interaction. For some values of these parameters, local order can modify considerably the elastic properties of the network system.

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