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

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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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Edited by:

Dragan P. Uskoković, Slobodan K. Milonjić and Dejan I. Raković

Pages:

491-496

Citation:

J. Budinski-Simendić et al., "Rubber Elasticity Study of Polyurethane Networks Prepared by Cyclotrimerisation Crosslinking Reaction of Isocyanate Groups", Materials Science Forum, Vol. 555, pp. 491-496, 2007

Online since:

September 2007

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$38.00

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