Synthesis of copolyesters via interchange reactions with polypivalolactone

Edze Jan Tijsma, Leen van der Does, Adriaan Bantjes, Ivan Vulić, Gerard Hidde Werumeus Buning

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    The synthesis of copolyesters via interchange reactions of polypivalolactone (PPVL) with bisphenol‐A polycarbonate (PC) and dimethyl terephthalate (DMT) was studied. Random copolyesters with high thermal stability were obtained by heating PPVL with PC and DMT in the melt at 280 °C in the presence of tetrabutylorthotitanate (TnBT) as a catalyst. Results from SEC measurements showed that the values for Mn of these copolyesters ranged from 7,000 to 16,000. The process for preparing these copolyesters was studied in detail and based on the results of these studies, the reactions occurring during copolyester synthesis were discussed. It was found that in the early stages of the process mainly interchange reactions occurred between PPVL and PC chains, whereas the amount of terephthalate units increased only after longer reaction times.
    Original languageEnglish
    Pages (from-to)187-191
    Number of pages5
    JournalMakromolekulare Chemie. Macromolecular symposia
    Issue number1
    Publication statusPublished - 1993


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