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Synthesis and Properties of Graft Copolymers Based on Poly(3‐hydroxybutyrate) Macromonomers
Author(s) -
Nguyen Sophie,
Marchessault Robert H.
Publication year - 2004
Publication title -
macromolecular bioscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.924
H-Index - 105
eISSN - 1616-5195
pISSN - 1616-5187
DOI - 10.1002/mabi.200300088
Subject(s) - macromonomer , comonomer , copolymer , polymer chemistry , methyl methacrylate , methacrylate , dispersity , polymerization , chemistry , materials science , organic chemistry , polymer
Summary: Graft copolymers of poly(methyl methacrylate) with poly(3‐hydroxybutyrate), PHB, segments as long side chains were prepared by the macromonomer method. PHB macromonomers were prepared from the esterification of oligomers with 2‐hydroxyethyl methacrylate at their carboxylic acid end. Esterification products displayed low polydispersity indices (ca. 1.2) and a functionality of over 83%, with a $\overline M _{\rm n}$ of 2 020. Using free radical polymerization methods, the macromonomers were copolymerized with methyl methacrylate to yield graft (comb type) copolymers at different comonomer feed ratios. The graft copolymers contained from 0.5 to 14 mol‐% of PHB blocks, with a glass transition temperature decreasing from 100 to 3 °C.Synthesis of PMMA‐ graft ‐PHB by the copolymerization of PHB macromonomers with methyl methacrylate.