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Study of some side reactions in the synthesis of diblock copolymers of isobutylvinylether and 2‐methyl‐2‐oxazoline by cationic polymerization
Author(s) -
Volet Gisèle,
Cheradame Hervé
Publication year - 1999
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(199904)48:4<307::aid-pi152>3.0.co;2-d
Subject(s) - cationic polymerization , copolymer , polymerization , living cationic polymerization , polymer chemistry , oxazoline , living polymerization , monomer , chemistry , polymer , ionic polymerization , materials science , ring opening polymerization , radical polymerization , organic chemistry , catalysis
The blocking of 2‐methyl‐2‐oxazoline fromliving poly(isobutylvinylether) was studied. First, theinitiation of isobutylvinylether (IBVE) by the systemHI‐I 2 was characterized. Experiments by theincremental monomer addition method confirmed that the system wasliving. A study of the homopolymerization of2‐methyl‐2‐oxazoline confirmed that thispolymerization must be carried out at much higher temperature thanthe living polymerization of IBVE. A study of the behaviour of PIBVEat the temperature required to polymerize2‐methyl‐2‐oxazoline revealed that this polymerexhibited dealcoholation. The detrimental effect of this sidereaction during polymerization of2‐methyl‐2‐oxazoline blocking could not beavoided by the presence of ditertiobutylpyridine (DtBP).However, block copolymers containing from 20 to 70% of IBVEwere obtained and characterized. © 1999 Society of Chemical Industry