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TECHNICAL PAPERS

Influence of Crosslinking on the Plastic Behavior of Amorphous Polymers at Large Strains

[+] Author and Article Information
Christian G’Sell, Abdelhamid Souahi

Ecole des Mines de Nancy (INPL), Laboratoire de Métallurgie Physique & Science des Matériaux (CNRS 155), Parc de Saurupt, 54042 Nancy, France

J. Eng. Mater. Technol 119(3), 223-227 (Jul 01, 1997) (5 pages) doi:10.1115/1.2812248 History: Received January 16, 1997; Revised May 12, 1997; Online November 27, 2007

Abstract

The mechanical properties of three grades of PMMA, one linear and two crosslinked, are investigated in tension below and above the glass transition temperature. It is found that strain-hardening decreases gradually with temperature in the glassy state, but keeps a significant value in the rubbery state. The results are analyzed in terms of an entropy-based statistical model (van der Giessen and Wu, 1992) which describes the stress-strain response of a chain network. The junctions of the network are not only associated with the chemical crosslinks, but additionally with physical entanglements, which are more numerous in the glassy state.

Copyright © 1997 by The American Society of Mechanical Engineers
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