The Properties of Dangling Chain-Networks Prepared by Cyclotrimerisation of Telechelic Diisocyanates


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Here, as part of our experimental investigations dealing with poly(urethane-isocyanurate) networks, we investigate model irregular networks with increasing amount of dangling chains. In our study such an irregular network topology was obtained by partial substitution of a diol for a monohydroxy component during the preparation of isocyanate terminated precursors. Telechelic diisocyanates were synthesized from aromatic diisocyanate (2,4-TDI), α,ω-dihidroxypoly (oxypropylene) (PPG 2000), and diethyleneglycolmonomethylether (an aliphatic low-molecularweight monool component). The networks in undiluted state were prepared by cyclotrimerisation, in the presence of a catalyst. The network properties were estimated by multiple extraction in solvent, differential scanning calorimetry and photoelastical measurements. Independently of mechanical testing, the fraction and concentration of dangling and elastically active network chains were evaluated by the theory of branching processes (cascade theory). The influence of dangling chains on the mechanical properties was analyzed.



Edited by:

Dragan P. Uskokovic, Slobodan K. Milonjic and Dejan I. Rakovic




J. Budinski-Simendić et al., "The Properties of Dangling Chain-Networks Prepared by Cyclotrimerisation of Telechelic Diisocyanates ", Materials Science Forum, Vol. 518, pp. 399-404, 2006

Online since:

July 2006




[1] I. Victorov, C. J. Radke and J. M. Prausnitz: Molecular Physics Vol. 100 (2002), p.2277.

[2] K. Dušek and M. Duškova-Smrčkova: Progress in Polymer Science Vol. 25 (2000), p.1215.

[3] D.A. Vega, M.A. Villar, J.L. Alessandrini and E.M. Valles: Macromolecules Vol. 34 (2001), p.4591.

[4] K. Urayama, T. Miki, T. Takigawa and S. Kobjiya: Chemistry of Materials Vol. 16 (2004), p.173.

[5] K. Dušek, M. Duškova-Smrčkova, J.J. Fedderly, G.F. Lee, J.D. Lee and B. Hartmann: Macromolecular chemistry and physics Vol. 203 (2002), p. (1936).


[6] K. Dušek, M. Dušková-Smrčkova, R. Stewart and J. Kopeček: Polymer Bulletin Vol. 47 (2001), p.351.

[7] J. Šomvarsky, K. Nijenhuis and M. Ilavsky: Macromolecules Vol. 33 (2000), p.3659.

[8] M. Špirkova, J. Budinski-Simendić, M. Ilavsky, P. Špaček and K. Dušek: Polym. Bulletin Vol. 31 (1993), p.83.


[9] J. Budinski-Simendić, M. Ilavsky, M. Špirkova, I. Krakovsky and K. Dušek: Advances in Structured and Heterogeneous Continua, Eds. D.A. Siginer and Y.G. Yanovsky (Allerton Press, New York 1994).

[10] J. Budinski-Simendić, M. Ilavsky, M. Špirkova, J. Šomvarsky and K. Dušek: Materials Science Forum Vol. 282-283 (1998), p.295.