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Elastic behavior of concentrated solutions of acrylonitrile copolymers. II. The shear‐stress dependence of the shear modulus of a pseudo network in concentrated solutions
Author(s) -
Hayahaila Takuro,
Takao Seiji
Publication year - 1968
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1968.070120723
Subject(s) - materials science , shear modulus , composite material , shear (geology) , copolymer , shear rate , shear stress , acrylonitrile , critical resolved shear stress , pure shear , polymer , viscosity
The shear‐stress dependence of the shear modulus in concentrated solutions of acrylonitrile copolymer was investigated by the capillary end‐correction method. The shear modulus decreases with an increase of shear stress above a critical polymer concentration at ti higher shear rate than that at which the decrease of the viscosity begins to occur. The non‐Hookian behavior of the concentrated solutions may be considered to arise from the breakdown of the tangled network structure, namely elastically deformable pseudo network.