Abstract
UV-curable hyperbranched aromatic polyamides were prepared by the acylation reaction of amine terminal groups of hyperbranched polyamides. End amino groups of hyperbranched aromatic polyamides with a molecular weight (IlI) of 11000 or 2600 were chemically modified by acryl, 4- pentenoyl, and 10-undecanoyl chlorides to introduce UV-curable vinyl groups. The photopolymerization kinetics of the UV-curable hyperbranched aromatic polyamides was investigated by Photo-DSC measurements. The photopolymerization of the polymer with the acryl amide terminal groups proceeded faster than with other functionalized polymers. Low molecular weight polymers showed high reactivity when the polymer had the same end functional group. The UV-cured films were transparent and yellow. Solubility of the films in organic solvents decreased significantly after UV-cure. The glass transition temperatures of the films increased after the UV-curing in comparison with the original functionalized polymers.
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