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Rubber Elasticity Study of Polyurethane Networks Prepared by Cyclotrimerisation Crosslinking Reaction of Isocyanate Groups

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Abstract:

The aim of this contribution was to study the rubber elasticity of dry and swollen networks obtained by cyclotrimerization crosslinking reaction of isocyanate groups located at a linear telechelic network precursor. Telechelic diisocyanates were prepared in the undiluted state from 2,4-tolylene diisocyanate, α,ω,dihydroxypoly(oxypropylenes) and different contents of the monool component 2-(2-metoxyetoxy) ethanol. The network synthesis proceeded in a bulk. Detailed network topology was calculated by the theory of branching processes. The equilibrium swelling degree of prepared samples was related to the parameters, which are experimentally accessible for a network arising from an end-linking process using the Flory-Rehner theory. The experimental data for network modulus were compared with those arising from the "affine" model, "phantom’ model" and the model of constrained junctions.

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Periodical:

Materials Science Forum (Volume 555)

Pages:

491-496

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.555.491

Citation:

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Online since:

September 2007

Authors:

J. Budinski-Simendić, M. Ilavsky, Jan Šomvarsky, M. Špírková, Lj. Korugić-Karasz, R. Radičević, T. Dikić, K. Dušek

Keywords:

Dangling Chains, Network Formation, Polymer Network, Polyurethane (PU), Rubber Elasticity, Swelling

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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