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Dynamic mechanical properties of deformed rubber‐modified acrylics
Author(s) -
Krause S.,
Broutman L. J.
Publication year - 1974
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.1974.070181008
Subject(s) - materials science , glass transition , natural rubber , composite material , deformation (meteorology) , polymer , dynamic mechanical analysis , activation energy , phase (matter) , chemistry , organic chemistry
Abstract Rubber‐modified acrylic polymers with rubber contents of 0, 1, 4, 7, 10, 13, and 16% were investigated to determine the effects of cold deformations on their mechanical and dynamic mechanical properties. A Rheovibron was used to determine damping as a function of temperature at four frequencies. A cold‐rolled film and a cold‐drawn film, stretched until fully crazed, were investigated. It was shown that cold deformation produces a small shift in the glass transition temperature of the rubber phase while the activation energy remains nearly unchanged. Also, the nature of the damping curve of the glassy matrix near the glass transition temperature of the matrix is altered by the appearance of a shoulder in the curve.