Arne Rüdiger1,2, Peter Hendil-Forssell3, Cecilia Hedfors3, Mats Martinelle3, Stacy Trey4,5,*, Mats Johansson1,4
Journal of Renewable Materials, Vol.1, No.2, pp. 124-140, 2013, DOI:10.7569/JRM.2012.634109
Abstract The present study describes the use of an epoxy functional fatty acid, 9,10-epoxy-18-hydroxyoctadecanoic acid
(EFA), extracted from birch (Betula pendula) outer bark to produce thermosets. The purifi ed epoxy fatty acid
was polymerized by enzyme-catalyzed polycondensation utilizing Candida antarctica lipase B (CalB) to form
oligomers with targeted degrees of polymerization (DP) of 3, 6, and 9 and obtained DPs of 2.3, 5.9 and 7.3,
respectively. It was determined that it is possible to fi rst enzymatically polymerize and aliphatically endcap
the epoxy functional fatty acid resulting in controlled oligomer lengths while also maintaining the epoxy
functionality… More >
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