Study of some side reactions in the synthesis of diblock copolymers of isobutylvinylether and 2-methyl-2-oxazoline by cationic polymerization
✍ Scribed by Volet, Gisèle; Cheradame, Hervé
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 131 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0959-8103
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✦ Synopsis
The blocking of 2-methyl-2-oxazoline from living poly(isobutylvinylether) was studied. First, the initiation of isobutylvinylether (IBVE) by the system was characterized. Experiments HI-I 2 by the incremental monomer addition method conürmed that the system was living. A study of the homopolymerization of 2-methyl-2-oxazoline conürmed that this polymerization must be carried out at much higher temperature than the living polymerization of IBVE. A study of the behaviour of PIBVE at the temperature required to polymerize 2-methyl-2-oxazoline revealed that this polymer exhibited dealcoholation. The detrimental eþ ect of this side reaction during polymerization of 2methyl-2-oxazoline blocking could not be avoided by the presence of ditertiobutylpyridine (DtBP). However, block copolymers containing from 20 to 70% of IBVE were obtained and characterized.