In this work we investigated the kinetics of the transesterification of divinyl adipate (DVA) with tetraethylene glycol (TEG) using Candida antarctica lipase B (CALB) as a biocatalyst at 50 oC under solventless conditions. We examined the time-dependence of the reactions with various DVA/TEG ratios. Samples were taken at the specified times, and then the composition and end group structures were analyzed by MALDI-ToF. We found conditions under which polycondensation was minimized and symmetric and asymmetric telechelic TEGs were obtained. Specifically, at DVA/TEG 20/1 molar ratio ~82% of the product was Vinyl-TEG-Vinyl after 30 minutes. HO-TEG-Vinyl was maximized at 70% at TEG/DVA 1.5/1 molar ratio at 10 minutes reaction time.

Green polymer chemistry: Investigation of the kinetics and mechanism of enzyme-catalyzed transesterification of divinyl adipate with tetraethylene glycol using MALDI-ToF

248th National Meeting (2014)

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