Characterization of p-Aminobenzoic-acid-modified Epoxy Resin and Its Emulsification Properties

Abstract

Abstract: The bisphenol type epoxy resin was modified by p-aminobenzoic acid to from amphophilic products.Although the modified resins had a poorer solubility in organic solvents, they tended to be dissolved more easily in basic solvents.The modified resins were characterized by using IRspectroscopy and DSC.The IRspectra of the modified resin indicate that the epoxy conversion increased with the increase of the content of p-aminobenzoic acid.The DSCcurves demonstrated the same trend of the glass transition temperature of the modified resins.The conductivity variations during the emulsification process of different systems were investigated.The dissociation of carboxyl groups and aggregation of particles during emulsification were proposed for the conductivity variation.The influence of neutralization value and solvent polarity on the particle size and morphology of the modified resin emulsion were also studied.

Key words: Epoxy resin, Chemical modification, IR spectra, Glass transition temperature, Conductivity, Particle size

CLC Number:

O633.13

TrendMD:

ZHANG Zhao-Ying, HUANG Yu-Hui, LIAO Bing, CONG Guang-Min. Characterization of p-Aminobenzoic-acid-modified Epoxy Resin and Its Emulsification Properties[J]. Chem. J. Chinese Universities, 2002, 23(5): 974.

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Characterization of p-Aminobenzoic-acid-modified Epoxy Resin and Its Emulsification Properties

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