Spectroscopic data of epoxy resins, derivatives of pyromellitimide, have shown two types of attack on the two carbons of the oxirane group, giving rise to normal and abnormal opening of the ring. Thus, primary and secondary hydroxy groups were obtained. The physical characteristics of the obtained new polymers and also their solubilities are reported. Thermal analysis of these epoxy polyesterimides showed their good thermal properties.
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Serra et al. (1986) studied this question.
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