Vinu, R and Marimuthu, A and Madras, Giridhar (2010) Enzymatic Degradation of Poly(soybean oil-g-methyl methacrylate). In: Journal of Polymer Engineering, 30 (1). pp. 57-76.
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This study discusses grafting of methyl methacrylate units from thepolymeric soybean oil peroxide to produce poly(soybean oil-graft-methyl methacrylate) (PSO-g-PMMA). The degradation of this copolymer in solution was evaluated in the presence of different lipases, viz Candida rugosa (CR), Lipolase 100T (LP), Novozym 435 (N435) and Porcine pancreas (PP), at different temperatures The copolymer degraded by specific chain end scission and the mass fraction of the specific product evolved was determined The degradation was modeled using continuous distribution kinetics to determine the rate coefficients ofmenzymatic chain end scission and deactivation of the enzyme The enzymes, CR. LP and N435 exhibited maximum activity for the degradation of PSO-g-PMMA at 60 degrees C, while PP was most active at 50 degrees C. The thermal degradability of the copolymer, assessed by thermo-gravimetry, indicated that the activation energy of degradation of the copolymer was 154 kJ mol(-1), which was lesser than that of the PMMA homopolymer.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Freund Publishing House Ltd.|
|Keywords:||PMMA,soybean oil;lipases;biodegradable polymers,continuous distribution kinetics|
|Department/Centre:||Division of Mechanical Sciences > Chemical Engineering|
|Date Deposited:||07 Jun 2010 05:47|
|Last Modified:||28 Jun 2011 11:47|
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