Premium
Synthesis and Characterization of Poly( ϵ ‐CL)‐ block ‐poly(MMA ‐co ‐St)‐ block ‐poly( ϵ ‐CL) by Combination of Coordination and Controlled Radical Polymerization
Author(s) -
Guo Zhenrong,
Wan Decheng,
Huang Junliang
Publication year - 2001
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/1521-3927(20010301)22:5<367::aid-marc367>3.0.co;2-x
Subject(s) - copolymer , polymer chemistry , caprolactone , polymerization , styrene , methyl methacrylate , materials science , radical polymerization , reversible addition−fragmentation chain transfer polymerization , chemistry , polymer , composite material
The triblock copolymer poly( ϵ ‐caprolactone)‐ block ‐poly[(methyl methacrylate)‐ co ‐styrene]‐ block ‐poly( ϵ ‐caprolactone) was synthesized by a combination of coordination polymerization and controlled radical mechanism. The poly( ϵ ‐caprolactone) prepolymers (PCL BP ) were first obtained by coordination polymerization using benzopinacol as the initiator and aluminium triisopropoxide as the promoter at room temperature. It was determined by means of UV and NMR spectroscopy that the benzopinacolate groups are left intact in the PCL BP prepolymers; no isomerization was found. The benzopinacolate groups incorporated into the poly( ϵ ‐caprolactone) then initiate the copolymerization of styrene (St) and methyl methacrylate (MMA) via a controlled radical mechanism at 95°C. The desired block copolymers were characterized by GPC, IR, UV and NMR spectroscopy in detail.