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Matrix relaxations in rubber‐toughened thermoplastics
Author(s) -
Starkweather Howard W.
Publication year - 1989
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.1989.070370521
Subject(s) - materials science , composite material , polyoxymethylene , natural rubber , dynamic mechanical analysis , modulus , glass transition , dynamic modulus , polyethylene , polymer , softening
In several systems involving a rubber dispersed in a higher modulus polymer, we have found that both the storage modulus are temperatures below the major softening process and the maximum value of the loss modulus are proportional to the square of the volume fraction of the matrix. This agrees with a relationship for foams derived theoretically by Termonia using a finite‐difference approach. Similar relationships have been found for the glass transition in polymethyl methacrylate and for crystalline relaxations in polyethylene, polyoxymethylene, and polytetrafluoroethylene which involve large decreases in modulus.