Abstract
A series of oligoester urethane semicarbazide acrylates has been synthesized in which the strongly interacting urethane semicarbazide blocks and acrylate groups are located at the ends of the chain. Differential scanning calorimetry, IR spectroscopy and small-angle X-ray techniques have been used to investigate the structure of the oligomers and polymers based on them as compared with polymers based on oligourethane acrylates of similar chemical structure. It is shown that the thermodynamic incompatibility of the blocks promotes the formation of a microheterogeneous structure in the oligomers. On polymerization of the block oligomers in the condensed state the microheterogeneous structure transfers to the polymer. Polymerization of the oligomers in the homogeneous state gives microheterogeneous polymers with a lower degree of microphase separation of the blocks. The synthesized polymers posses far higher strength properties than polymeric materials based on oligourethane acrylates.
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