| Summary: | 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.
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