Abstract
N-(4-Hydroxy phenyl)maleimide (HPMI) is functionalized with acryloyl, methacryloyl, allyl, propargyl and cyanate groups and the structures of the materials are characterized by FTIR, 1H NMR and 13C NMR. Thermal curing behaviours of the monomers and thermal stabilities of the polymers are studied using thermal analysis. Introduction of polymerizable groups shifts the curing exotherm to low temperatures, and the curing behaviour is dictated by the polymerizable substituent present in the aromatic ring. Polymer from acryloyl-functionalized monomer shows the highest thermal stability (402 °C), whereas the highest char value (49 % at 700 °C) is noted for the polymer obtained from propargyl-functionalized monomer. Polymers derived from functionalization of HPMI with acryloyl and methacryloyl showed better thermal stabilities. Thermosets formed by the thermal polymerization of HPMI functionalized with propargyl and cyanate groups showed higher char values at 700 °C in nitrogen atmosphere.
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Acknowledgments
The authors would like to thank the Board of Research in Nuclear Science (BRNS), Department of Atomic Energy (DAE), Government of India, BARC, Mumbai-400 085 for financially supporting this study under the Grant 2010/35/5/BRNS/1279 dated 11-08-2010. The authors wish to thank Lalit Varshney and K. S. S. Sharma of BARC for their constant encouragement and support. The authors also owe their sincere thanks to the Management and the Principal of Kamaraj College of Engineering and Technology, S.P.G.C. Nagar, K. Vellakulam Post-625701, India for providing all the facilities to complete this study.
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Pitchaimari, G., Vijayakumar, C.T. Functionalized monomers based on N-(4-hydroxy phenyl)maleimide. J Therm Anal Calorim 114, 1351–1361 (2013). https://doi.org/10.1007/s10973-013-3174-4
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DOI: https://doi.org/10.1007/s10973-013-3174-4