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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
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Materials 2019, 12(10), 1576; https://doi.org/10.3390/ma12101576
Received: 12 April 2019 / Revised: 5 May 2019 / Accepted: 9 May 2019 / Published: 14 May 2019
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Abstract

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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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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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