Abstract
Eight polycyanurates have been synthesized by the interfacial polycondensation of 2-carbazol-4,6-dichloro-s-triazine with 1,7-dihydroxynaphthalene (DHN-1,7), 1,4-dihydroxyanthraquinone (DHA-1,4), ethylene glycol (EG), diethylene glycol (DEG), triethylene glycol (TEG), 1,2-propanediol (Pr-1,2), 1,4-butanediol (Bu-1,4) and 1,8-dihydroxyanthraquinone (DHA-1,8). All of the polycyanurates thus synthesized were characterized for their solubility, density, viscosity, infrared spectra, nuclear magnetic resonance spectra and thermogravimetric analysis. Chlorinated solvents were found to be good solvents for all of the polymers. The density of the polycyanurates varied from 1.186 to 1.247 gm cm−3. The intrinsic viscosity of the polycyanurates followed the sequence given below: homopolycyanurates of DHN-1,7 (HPDHN-1,7)>homopolycyanurates of DHA-1,8 (HPDHA-1,8)>homopolycyanurates of DHA-1,4 (HPDHA-1,4)>homopolycyanurates of EG (HPEG)>homopolycyanurates of DEG (HPDEG)>homopolycyanurates of TEG (HPTEG)>homopolycyanurates of Bu-1,4 (HPBu-1,4)>homopolycyanurates of Pr-1,2 (HPPr-1,2). The thermal stability of the polycyanurates increased as follows: HPTEG<HPPr-1,2<HPDEG≈HPBu-1,4<HPEG<HPDHA-1,8<HPDHA-1,4<HPDHN-1,7.
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Asundaria, S., Patel, V. & Patel, K. Synthesis and study of polycyanurates based on 2-carbazol-4,6-dichloro-s-triazine. Polym J 44, 401–409 (2012). https://doi.org/10.1038/pj.2011.146
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DOI: https://doi.org/10.1038/pj.2011.146
