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《Materials for Mechanical Engineering》 2013-05
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Diffusion Properties of Water in Epoxy Coating Modified by Epoxidized Soybean Oil

ZHENG Yao-chen,DUAN Wei,XIA Zhong-gao,QI Hui-min(School of Chemistry and Chemical Engineering,Yantai University,Yantai 264005,China)  
A series of epoxy coatings with different contents(0-15.15%) of epoxidized soybean oil(ESO) were prepared by adding ESO into the system of bisphenol A epoxy resin(DGEBA) and modified diethylenetriamine(DETA).Critical stress-intensity rupture strength factor(KIC) of the modified coating was tested according to three-point bending test and curves of mass gain and time were obtained by static immersing test,and the glass transition temperature Tg was tested.The diffusion coefficient D of water molecules in modified coating was calculated.The results show that KIC increased and then decreased,Tg and mass gain decreased gradually,and D decreased and then increased with the increase of ESO content.When mass fraction of ESO was 7.35wt%,the anti-water molecules diffusion coefficient of the modified coatings was the best.
【Fund】: 烟台大学青年基金资助项目(HY10Z11-02748)
【CateGory Index】: TS221
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