Polyimides Containing S-Triazine Ring (Part-1)

摘要

Novel polymides containing s-triazine nucleus were prepared via Diels-Alder (DA) intermolecular polymerization of 2,4-bis(2-furanyl methyl imino)-4-methoxy-1,3,5-triazine (1) with different bis(maleimido)compounds (2a-h).The DA reaction was carried out in tetrahydrofuran as solvent,as well as in bulk followed by dehydration on aromatization of poly(tetrahydrophthalimido)-intermediates (3a-h) in the presence of acetic anhydride.All the poly(imino s-triazine imide)s (4a-h)were characterized by ele-mental analysis,IR spectral studies,and thermogravimetry.1 and 2a-h were polymer-ized (at 150(+-)10degC) by in-situ Diels-Alder intermolecular reaction into poly(iminos-triazine imide)s-glass fibre reinforced composites (i.e.,laminates)without evolution of bi-products.The prepared composites were characterized by chemical resistivity and mechanical properties.