Synthesis and functional analysis of phenyl-end-blocked poly(methyl methacrylate) with N,N′-dimethyl-N,N′-bis(phenethyl)thiuram disulfide as a thermal iniferter
✍ Scribed by Shah Abdul Haque; Gilbert Clouet
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 519 KB
- Volume
- 195
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
Phenyl‐end‐blocked poly(methyl methacrylate) was synthesized by bulk polymerization of methyl methacrylate by a new functional iniferter, viz., N,N′‐dimethyl‐N,N‐bis(phenethyl)‐thiuram disulfide by thermal polymerization. The iniferter was synthesized and characterized by elemental analysis, ultraviolet, infrared, ^1^H and ^13^C nuclear magnetic resonance (^1^H NMR and ^13^C NMR). Some kinetic parameters like rate of polymerization, variation in the molecular weight and transfer constants as a function of iniferter concentration in the temperature range between 55°C and 100°C have been studied. The rate of polymerization increased with increasing temperature but passed through a maximum with respect to the iniferter concentration. The rate did not follow straight‐line behaviour with respect to iniferter concentration as usually found with alkylthiuram disulfides. The chain transfer due to iniferter exhibited the usual temperature dependence, and the activation energy was of the same order of magnitude as for the aliphatic thiuram disulfide. Spectral and thermal analyses of the resultant polymers confirmed the terminal functionalization of the polymer chains.