Ontology type: schema:ScholarlyArticle
1995-09
AUTHORSDiana P. Fasce, Roberto J. J. Williams
ABSTRACTThe polycondensation (Michael addition) of a bismaleimide (BMI, N,N-4,4′-[(1-methylethylidene) bis (phenyleneoxyphenylene)] bismaleimide) with an aromatic diamine (DA, 4,4′-[1,3 phenylene bis (1-methylethylidene)] bisaniline), in a 1:1 molar ratio, was followed using SEC and FTIR techniques. The polycondensation followed a 2nd-order kinetics with an activation energy, E=51 kJ mol−1. The mass fraction of dimer varied with conversion following the statistical prediction for an ideal A2+B2 polycondensation. At 60% conversion, gelation was observed. This was ascribed to a small advance in the BMI homopolymerization. Thermal degradation took place at T>200 °C. The first step was, possibly, a reversal in the Michael addition reaction as revealed by the decrease in the concentration of CH2 groups observed in FTIR spectra. More... »
PAGES515-522
http://scigraph.springernature.com/pub.10.1007/bf00423346
DOIhttp://dx.doi.org/10.1007/bf00423346
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