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Viscous and Failure Mechanisms in Polymer Networks: A Theoretical Micromechanical Approach

Department of Engineering & Architecture, University of Parma, 43121 Parma, Italy
Author to whom correspondence should be addressed.
Materials 2019, 12(10), 1576;
Received: 12 April 2019 / Revised: 5 May 2019 / Accepted: 9 May 2019 / Published: 14 May 2019
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Polymeric materials typically present a complex response to mechanical actions; in fact, their behavior is often characterized by viscous time-dependent phenomena due to the network rearrangement and damage induced by chains’ bond scission, chains sliding, chains uncoiling, etc. A simple yet reliable model—possibly formulated on the basis of few physically-based parameters—accounting for the main micro-scale micromechanisms taking place in such a class of materials is required to properly describe their response. In the present paper, we propose a theoretical micromechanical approach rooted in the network’s chains statistics which allows us to account for the time-dependent response and for the chains failure of polymer networks through a micromechanics formulation. The model is up-scaled to the mesoscale level by integrating the main field quantities over the so-called ‘chains configuration space’. After presenting the relevant theory, its reliability is verified through the analysis of some representative tests, and some final considerations are drawn. View Full-Text
Keywords: polymers; chains network; damage; chains failure; visco-elastic response polymers; chains network; damage; chains failure; visco-elastic response

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Brighenti, R.; Artoni, F.; Cosma, M.P. Viscous and Failure Mechanisms in Polymer Networks: A Theoretical Micromechanical Approach. Materials 2019, 12, 1576.

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