Abstract
AbstractA few unsaturated polyamides were prepared by thionyl chloride activated low temperature polycondensation and solution polymerization of fumaric, adipic, isophthalic, and terephthalic acid or their diacid chloride derivatives with 1,5‐bis‐(3‐aminophenyl)‐1,4‐pentadiene‐3‐one. The polymers were characterized by nitrogen analysis and IR spectroscopy. The solution, thermal, and electrical properties of the polymers were studied. The polymers were found to be soluble in polar solvents. The solubility parameter of the polymers were calculated from Small's group contributions which agreed well with the experimental values. The polymers readily underwent crosslinking reaction when heated alone or preferably in the presence of a suitable free radical catalyst. The crosslinked polymers were found to be insoluble in polar solvents and possessed higher thermal stability compared with the virgin polymers. The swelling behaviour of the polymers were studied in detail and the molecular weight between two crosslinked junctions were also found out. X‐ray diffraction and dielectric properties of the crosslinked polymers were also reported.
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