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Abstract
Abstract Unsaturated polyamides from fumaric acid and ortho-, meta- and para-phenylene diamine were prepared by thionyl chloride activated low temperature polycondensation in polar solvents. The polymers were found to be soluble in highly polar solvents. The solubility parameter of the polymers was calculated from Small's group contribution, which agreed well with the experimental values. X-ray diffraction study revealed that the polymers were amorphous. The isomeric effect on the thermal and electrical properties of polymers was discussed.
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