Abstract
Two structurally different monomers bearing furan terminal groups and cyano pendant groups were synthesized and polymerized with 4,4′-bismaleimidediphenylmethane (BMDM) through a Diels-Alder type reaction. In addition, furfurylamine reacted with half molar amount of terephthaloyl dichloride in the presence of triethylamine and the product obtained reacted with BMDM to yield a reference polymer. The starting materials as well as their intermediate compounds were characterized by FT-i.r., 1H-NMR spectroscopy and elemental analyses. The curing behaviour of monomers was investigated by DTA. It was shown that the Diels-Alder reaction between the maleimide and furan segments occurred at considerably lower temperature than that required for crosslinking of BMDM itself. Crosslinked resins were obtained upon curing the Diels-Alder polymers through their pendant cyano groups. They displayed higher thermal stability than that of reference polymer.
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