Calorimetric study of cross-linking polymerization of methyl methacrylate in the presence of a multimonomer |
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Authors: | H?Szocik Email author" target="_blank">R?JantasEmail author |
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Institution: | (1) Department of Physical Chemistry of Polymers, Technical University of ód , 90-924 ód , Poland |
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Abstract: | The kinetics of free-radical cross-linking polymerization of methyl methacrylate (MM) in the presence of poly2-(10-undecenoyloxy)ethyl methacrylate] (PUDEM) as a macromolecular cross-linker has been isothermally examined within the temperature range from 85–100°C using the differential scanning calorimetry (DSC). The activation energy found for this reaction, E
a=89.3 kJ mol–1, exceeds slightly the literature values of activation energy obtained for the mass polymerization of MM without any cross-linking agent. The activation energy has been also determined by the isoconversion method. It has been found that E
a decreases with the increase in the conversion, which may indicate a change in the reaction mechanism.This work was partly supported by the Committee for Research (KBN) in the framework of project No. 7 T08E 026 20 |
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Keywords: | cross-linking DSC kinetics MM multimonomer polymerization |
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