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An analytical method, referred to as "derivatization-electron probe X-ray micro-analysis (XMA)", has been developed to determine the distribution of small amounts of functional groups in polymers with a lateral resolution of µm order using equipment available generally. The suitable conditions for the derivatization reaction with the vinyl group, the carbonyl group, the carboxyl group and the hydroxyl group formed by the oxidation and the hydrolysis of polymers were investigated. [1][2][3][4] This present method is useful for the characterization of polymers and the study of the polymer degradation. Also, this method can be used for the study of the hardening mechanism and the evaluation of the hardening degree, because the abovementioned functional groups contribute to the hardening of polymers. The epoxy group also contributes to the hardening of the adhesive and of the coating, as well as the above-mentioned functional groups. The neutralization titration method and the potentiometric titration method, among others, have been reported as methods for measuring the quantity of epoxy groups. However, these methods can only measure the average of functional groups, and can not measure the distribution of functional groups in the polymer. Therefore, in this study, a suitable condition for the derivatization reaction of epoxy groups in polymers was investigated in order to use this method effectively. Also, the utility of this method in the study of the hardening mechanism and in the evaluation of the hardening degree was confirmed by applying this method to the distribution analysis of epoxy groups in the adhesive and the coating.

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