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Living cationic polymerization of vinyl ethers in the presence of added bases: Recent advances
Author(s) -
Aoshima Sadahito,
Kobayashi Eiichi
Publication year - 1995
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19950950110
Subject(s) - living cationic polymerization , cationic polymerization , polymerization , polymer chemistry , polymer , living polymerization , living anionic polymerization , copolymer , chemistry , substituent , anionic addition polymerization , vinyl polymer , functional polymers , vinyl ether , radical polymerization , materials science , organic chemistry
The living cationic polymerization of vinyl ethers was carried out with organoaluminum compounds in the presence of various types of esters and ethers (cyclic and acyclic), to find out the suitable added bases available for the living polymerization. The effects of the basicity and steric hindrance of added bases were investigated in detail. On the basis of these results, a fast living polymerization system was realized. To synthesize water‐soluble polymers such as thermally‐induced phase separating polymers and polyalcohols with well‐defined polymer structure, the living polymerization of various vinyl ethers was examined. The aqueous solution of living poly(vinyl ethers) having oxyethylene units exhibited a quite sensitive (ΔT ps =0.3–0.5°C) and reversible phase separation on heating and cooling. The effects of polymer structures (pendant substituent, polymer sequence, molecular weight, and MWD) on the phase separation behavior were investigated. PVA and block copolymers containing PVA units with a narrow MWD were also prepared via living cationic polymerization of vinyl ethers and a deprotection reaction.