A study of the polymerization behaviour of N-(4-phenoxy)-phenylmaleimide using DSC analysis |
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Authors: | John M. Barton Ian Hamerton Corrine P. Thompson |
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Affiliation: | (1) Department of Chemistry, University of Surrey, GU2 5XH Guildford, Surrey, UK;(2) Materials and Structures Department, Defence Research Agency (Aerospace Division) RAE, GU14 6TD Farnborough, Hampshire, UK |
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Abstract: | Summary The thermal cure of a monofunctional maleimide N-(4-phenoxy)-phenylmaleimid (1) was examined using differential scanning calorimetry (DSC). The analogous bis-maleimide bis-(4-maleimidophenyl)ether (2) was also analyzed in the same manner for comparison. Polymerization kinetics derived from scanning DSC measurements showed an order of reaction varying between n=1 and 2 for (1), compared to an order of reaction between n=2 and 3 (by multiple linear regression analysis) for (2). The overall enthalpy of polymerization ( Ho) for N-(4-phenoxy)-phenylmaleimide (94kJ/mole) agrees well with that obtained for maleimide itself (89kJ/mole) using conventional calorimetric techniques indicating that polymerization appears complete within the timescale of the experiment. In contrast the analogous BMI displays a markedly lower overall polymerization enthalpy (ca. 66kJ/mole) indicating an apparent conversion of only 37%. |
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