Lipase-Catalyzed Synthesis and Curing of High-Molecular-Weight Polyricinoleate

✍ Scribed by Hiroki Ebata; Kazunobu Toshima; Shuichi Matsumura

• Book ID: 102471914
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 163 KB
• Volume: 7
• Category: Article
• ISSN: 1616-5187
• DOI: 10.1002/mabi.200700018

✦ Synopsis

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.

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