Alkali metal carbonate catalyzed copolymerization of anhydrides and epoxides: a simple, efficient and versatile approach to well-defined alternating polyesters

Abstract

Ring-opening alternating copolymerization (ROAC) has been an attractive strategy for polyester synthesis recently. To date, the ROAC catalysts are restricted to organometallics and organic super-bases. In this work, we report...

Synthesis of ABx and ABxC poly(ester-ether) polymers: polymer sequences and effects of Bx and BxC units on thermal properties

“…Nevertheless, both molecular weights obtained from NMR and GPC methods progressed linearly along the same increasing trend with increasing SA conversion. The low molecular weight could be from impurities from cyclic anhydrides 46,47 and some protic impurities from commercial SnOct 2 that can undergo chain transfer causing low M n . 40,41 The amount of AB x polymer can be increased impressively to 95% with only 5% of the alternate AB polymer when the polymerization is carried out in neat CHO (Table 1, entry 7 and Fig.…”