Reactive blending of functional polysiloxanes with poly(butylene terephthalate): Clarification of reaction mechanisms and kinetics from a model compound study

Fustin, Charles-André;Sclavons, Michel;Verhelst, V;Vermylen, V;Bailly, Christian;et.al.
(2002) Journal of Polymer Science. Part A, Polymer Chemistry — Vol. 40, n° 12, p. 1952-1961 (2002)

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Abstract
We clarify the reaction mechanisms and kinetics in melt-reacted blends consisting of functional polysiloxanes and poly(butylene terephthalate) (PBT) with a model compound study. As models for polysiloxanes, we have selected two monodisperse omega-functionalized siloxane oligomers with Si-H and Si-vinyl moieties. To mimic PBT, we have chosen low molecular weight compounds representative for in-chain and end-functional groups of the polymer; ester, carboxylic acid, alcohol, and vinyl. Uncatalyzed and platinum-catalyzed reactions have been performed in sealed vials. Reaction products have been characterized by gradient polymer elution chromatography, Fourier tran form infrared spectroscopy, and size exclusion chromatography. PBT functional groups reactive toward functional siloxane oligomers at high temperatures in the presence and absence of a catalyst have been identified, and an estimate of relative reaction kinetics has been provided, We suggest reaction mechanisms compatible with our results and with literature data. (C) 2002 Wiley Periodicals, Inc.
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Fustin, C.-A., Sclavons, M., Verhelst, V., Vermylen, V., Bebelman, S., Merlin, P., & Bailly, C. (2002). Reactive blending of functional polysiloxanes with poly(butylene terephthalate): Clarification of reaction mechanisms and kinetics from a model compound study. Journal of Polymer Science. Part A, Polymer Chemistry, 40(12), 1952-1961. https://doi.org/10.1002/pola.10283 (Original work published 2002)