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The polycondensation of maleic anhydride with poly(ethylene glycol)s of different molecular weights has been examined. At the used reaction conditions the occurrence of some secondary reactions such as polyglycol depolymerization and the addition of glycols to double bonds in the polyesters was established. The possible chemical structure of the obtained unsaturated polyesters is proposed.
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Nichifor et al. (1992) studied this question.
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