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The copolymerisation of methyl and ethyl methacrylate in supercritical carbon dioxide
Author(s) -
Giles Matthew R.,
Hay John N.,
Howdle Steven M.
Publication year - 2000
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(20001001)21:15<1019::aid-marc1019>3.0.co;2-m
Subject(s) - copolymer , supercritical carbon dioxide , methyl methacrylate , polymer chemistry , monomer , azobisisobutyronitrile , dispersion polymerization , macromonomer , supercritical fluid , methacrylate , stabiliser , siloxane , radical initiator , radical polymerization , materials science , chemistry , organic chemistry , polymer , nanotechnology
This paper reports the free radical dispersion copolymerisation of methyl and ethyl methacrylate in supercritical carbon dioxide. The polymerisation uses a poly(dimethyl siloxane) monomethacrylate macromonomer as the stabiliser. A range of different reaction times was investigated in order to probe the amount of each monomer incorporated in the copolymer. Analysis by 1 H NMR spectroscopy reveals that the monomers behave as in conventional solvents to form a random copolymer. The effect of varying the initiator concentration (initiator 2,2′‐azobisisobutyronitrile, AIBN) on the composition and molecular weights of the resultant copolymers has also been studied.