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Polymerization of - Phenylmaleimide Initiated by 9-Borabicyclo[3.3.1]nonane

✍ Scribed by Kanno, Shuichi; Hosoi, Masayoshi; Ogata, Tateaki; Takeishi, Makoto

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
268 KB
Volume
42
Category
Article
ISSN
0959-8103

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✦ Synopsis

N-Phenylmaleimide (N-PMI) was polymerized by 9-borabicyclo[3.3.1] nonane (9-BBN) in tetrahydrofuran under argon at 0Β‘C. The molecular weight distributions of the resulting polymers were around 1Γ‰1. The rate of polymerization was proportional to [9-BBN]1Γ•18 and [N-PMI]1Γ•24. Hydroquinone had little e †ect on the rate of polymerization and on the molecular weight of the polymers obtained. Triethylamine completely inhibited the polymerization, and aniline with a relatively small value and zinc iodide e †ectively retarded the pK a polymerization. The polymerization did not proceed either in polar dimethylformamide or in non-polar toluene. In polymerizations at temperatures higher than 60Β‘C the conversions decreased. On the basis of the results, a non-radical mechanism was proposed for this polymerization.

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Vinyl acrylate (VA) was polymerized with 9-borabicyclo[3.3.1]nonane (9-BBN) in tetrahydrofuran under argon at low temperatures (to [60Β‘C). Hydroquinone and 2,6-di-tert-butyl-p-cresol had little e †ect on the polymerization. Addition of tetrachloromethane as a radical chain transfer agent did not lea