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《China Plastics Industry》 2012-02
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Comparison on Properties of EP and UP for Wind Turbine Blade Use

LIU Kui,FENG Xue-bin,LEI Zhi-min,LIU Bao-liang,YANG Yue-hua(Zhuzhou Times New Materials Science and Technology Co.,Ltd.,Zhuzhou 412007,China)  
The performance of epoxy resin and unsaturated polyester resin was compared.Through the resin viscosity-time curve test,unsaturated polyester′s viscosity throughout the operating area changed little with excellent control of the process.The difference between the two resins was studied though the two resin fracture surfaces observation by SEM and mechanical properties testing.Results showed although the bending strength and compression strength of unsaturated polyester were higher,the average rate as 2.41%of elongation at break was far from 8.71% which was much lower than that of the epoxy resin.analysis of the glass transition temperature showed unsaturated polyester′s free volume within the lower tension in the body can not by groups within the movement of molecules to reduce the tensile stress within the system,so the body brittleness increased and lead to a limited use when material was in the large deformation.
【Fund】: 国家863计划资助项目(2007AA03Z563);; 湖南省重大科技专项资助项目(2009FJ1002)
【CateGory Index】: TQ323.5
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