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Solid-State Polymerization of 4-(4-Dimethylaminophenyl)-urazole with Diisocyanates

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Abstract

In the present study, the solid-state thermal polymerization of 4-(4-dimethylaminophenyl)-1,2,4-triazolidine-3,5-dione (DAPTD) with diisocyanates such as hexamethylene diisocyanate, isophorone diisocyanate and toluylene-2,4-diisocyanate as a new method for synthesis of polyureas are described. The influence of reaction parameters, such as presence of catalyst in the starting material and ratio of DAPTD to diisocyanate were investigated. Polycondensation was successfully preceded without any solvent, which is used in conventional method. The resulting polyureas were obtained in high yields with inherent viscosities ranging from 0.14 to 0.25 dL/g. This method was also compared with two other polycondensation methods for the polymerization reactions which were reported before: conventional solution method and a method using tetrabutylammonium bromide as a molten ionic liquid media.

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Authors and Affiliations

  1. Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, 84156-83111, Isfahan, I.R. Iran

    Shadpour Mallakpour & Zahra Rafiee

Authors
  1. Shadpour Mallakpour
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  2. Zahra Rafiee
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Correspondence to Shadpour Mallakpour.

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Mallakpour, S., Rafiee, Z. Solid-State Polymerization of 4-(4-Dimethylaminophenyl)-urazole with Diisocyanates . Polym. Bull. 60, 507–514 (2008). https://doi.org/10.1007/s00289-008-0888-8

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  • DOI: https://doi.org/10.1007/s00289-008-0888-8

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