Modification of Aqueous-based PU with Epoxy Resins

• Main Authors: Maw-Shuh Chen, 陳茂樹
• Other Authors: Kan-Nan Chen
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/85490278155859085276

碩士 === 淡江大學 === 化學學系 === 82 === The hydrophobic characters of epoxy resin molecules couldenetrate into PU particles in the aqueous PU dispersions, and the curing reactions between epoxy and NH groups of PU molecules(PU particles).The stability of epoxy resins modified PU dispersions were moitored by fluorescence,particle size analyer and zeta potentiometer.The degree of impovement of physical and mechanical properties of PU films were depent on the proportion of epoxy resins,the optimum percent of epoxy resins would be less than 15%.The model reactions of epoxy with amino group containing compounds were surveyed by N.M.R.and IR spectra.The properties of PU films were tested with universal testing mechine,DMA,water absorption,as well as gel contents.