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Lipase‐Catalyzed Synthesis and Curing of High‐Molecular‐Weight Polyricinoleate
Author(s) -
Ebata Hiroki,
Toshima Kazunobu,
Matsumura Shuichi
Publication year - 2007
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.200700018
Subject(s) - crystallinity , lipase , nuclear chemistry , chemistry , curing (chemistry) , materials science , polymer chemistry , composite material , organic chemistry , enzyme
Abstract High‐molecular‐weight polyricinoleate, with an $\overline M _{\rm w} $ of 100 600, was enzymatically prepared by the polycondensation of methylricinoleate using immobilized lipase from Pseudomonas cepacia (IM‐PC) in bulk in the presence of 4 Å molecular sieves at 80 °C for 7 d. Polyricinoleate was a viscous liquid at room temperature with a glass transition temperature ( T g ) of −74.8 °C, showed no crystallinity and was biodegraded by activated sludge. Polyricinoleate was readily cured using a dicumyl peroxide at 170 °C for 30 min to produce a chloroform insoluble crosslinked polyricinoleate with a hardness of 50A using durometer A.