Abstract
Thiophenol initiated the polymerization of N-substituted maleimides such as N-phenylmaleimide (N-PMI) and N-ethylmaleimide (N-EMI) without oxidant. The SEC spectrum of poly(N-PMI) was multimodal; however, it changed to unimodal in the presence of hydroquinone and polymerization was partially inhibited. The results indicated that the polymerization proceeded via both radical and non-radical reactions. The radical polymerization was initiated by radical species yielded from a charge-transfer complex of thiophenol with N-PMI, and the non-radical process was assumed to be an anionic one in which the Michael addition of thiophenol to N-PMI initiated the polymerization.
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Takeishi, M., Arimori, S., Iwasaki, N. et al. Polymerization of N-Substituted Maleimides Initiated by Thiophenol. Polym J 24, 365–373 (1992). https://doi.org/10.1295/polymj.24.365
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DOI: https://doi.org/10.1295/polymj.24.365