Issue 13, 2022

Temperature triggered alternating copolymerization of epoxides and lactones via pre-sequenced spiroorthoester intermediates

Abstract

We report the alternating copolymerization of caprolactone and epoxide through the in situ formation of pre-sequenced spiroorthoester monomer. The reaction is catalyzed by the temperature triggered, bifunctional cationic indium complex (±)-[(NNiOtBu)In(CH2SiMe3)][B(C6F5)4] (1). 1 can catalyze the coupling of epoxide and lactone to form spiroorthoester at 60 °C and its double ring-opening polymerization at 110 °C to form poly(ether-alt-ester). The post-polymerization modification and degradation of the poly(ether-alt-ester) are further investigated.

Graphical abstract: Temperature triggered alternating copolymerization of epoxides and lactones via pre-sequenced spiroorthoester intermediates

Supplementary files

Article information

Article type
Edge Article
Submitted
28 noy 2021
Accepted
14 fev 2022
First published
16 mar 2022
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2022,13, 3713-3718

Temperature triggered alternating copolymerization of epoxides and lactones via pre-sequenced spiroorthoester intermediates

H. Jung, C. Goonesinghe and P. Mehrkhodavandi, Chem. Sci., 2022, 13, 3713 DOI: 10.1039/D1SC06634J

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