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Kinetics of the Curing of Polyurethane Modified Unsaturated Polyester Resin

YE Bei,ZHOU Quan,SONG Ning,NI Li-zhong(School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China)  
The curing characteristic and kinetics analysis of polyurethane modified unsatura-(ted) polyester are studied by DSC and FT-IR.The network of polyurethane is formed much faster than that of unsatura-(ted) polyester.The apparent activation energy of UPR is 58.0 kJ/mol,while that of polyurethane modified UPR is 64.8 kJ/mol.There is no significant difference between the two systems.The reaction order of UPR is 0.90,while that of polyurethane modified UPR is 0.91.
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