Premium
Synthesis of Poly(styryl sugar)s by TEMPO Mediated Free Radical Polymerization
Author(s) -
Chen Yongming,
Wulff Günter
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20011101)202:17<3426::aid-macp3426>3.0.co;2-p
Subject(s) - polymer chemistry , monomer , chemistry , trifluoroacetic acid , copolymer , radical polymerization , polymerization , radical initiator , polymer , organic chemistry
Controlled free radical polymerizations of the four isopropylidene protected styryl sugar monomers, 2,3;4,5‐di‐ O ‐isopropylidene‐1‐(4‐vinylphenyl)‐ D ‐gluco( D ‐manno)pentitol ( 1 ), 2,3‐isopropylidene‐1‐(4‐vinylphenyl)‐ D ‐threo( D ‐erythro)triol ( 2 ), 1,2;3,4‐di‐ O ‐isopropylidene‐1‐(4‐vinylphenyl)‐ D ‐glyero( L ‐glycero)‐α‐ D ‐galactopyranose ( 3 ), 2,3;4,5‐di‐ O ‐isopropylidene‐1‐(4‐vinylphenyl)‐ D ‐manno( D ‐gluco)‐hexulo‐2,6‐pyranose ( 4 ), were studied with N ‐(α‐methylbenzyloxy)–2,2,6,6‐tetramethylpiperidine ( 5 ) as initiator. The kinetic studies show that the controlled polymerizations of these four monomers were achieved. Polymerization of monomers 1 , 2 and 3 gave the polymers with relatively low polydispersities while the monomer 4 gave relatively higher polydispersities. Poly(styryl sugar)s with different molecular weight were thus synthesized by changing the molar ratio of the monomers to the initiator. With these four kinds of homopolymers as initiators, the corresponding block copolymers with polystyrene were also prepared. The deprotected homopolymers were further obtained by treatment with aqueous trifluoroacetic acid.