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Relaxations in lightly crosslinked polymers

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Abstract

A simple model for stress relaxation in entangled polymer melts is developed by using Gaussian statistical formulae to describe the polymer molecules, and by modelling the entanglements as energy barriers that the sliding molecules have to overcome. These entanglements are assumed to increase in number as deformation proceeds, this increase being related to loose topological knots tightening. The predictions of the model are compared with experiments conducted on plasticized poly(vinyl chloride), and with published data for a styrene-butadiene copolymer. In terms of this model, the tightening of entanglements appears to be important in polymers in which the intermolecular interactions are heterogeneous due to copolymerization or limited crystallinity, but not important in amorphous homopolymers in which entanglements are expected to be more homogeneous.

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Authors and Affiliations

  1. Department of Materials Engineering, Monash University, 3168, Clayton, Victoria, Australia

    G. H. Edward & R. G. O'Donnell

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  1. G. H. Edward
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  2. R. G. O'Donnell
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Edward, G.H., O'Donnell, R.G. Relaxations in lightly crosslinked polymers. J Mater Sci 21, 958–964 (1986). https://doi.org/10.1007/BF01117379

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  • DOI: https://doi.org/10.1007/BF01117379

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