Oligomerization and copolymerization of γ-butyrolactone — a monomer known as unable to homopolymerize, 1. Copolymerization with ε-caprolactone
✍ Scribed by Andrzej Duda; Stanislaw Penczek; Philippe Dubois; David Mecerreyes; Robert Jérôme
- Book ID
- 102482762
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 496 KB
- Volume
- 197
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
Copolymerization of γ‐butyrolactone (γBL) with ε‐caprolactone (εCL) initiated with aluminium isopropoxide trimer ([Al(O^i^Pr)~3~]~3~, (A~3~)) is described. Copolymers with molecular weights (M~n~) up to 3 · 10^4^ and containing up to 43 mol‐% repeating units derived from γBL are prepared. Their molecular weight is controlled by the concentrations of the consumed comonomers and the starting concentration of initiator {M~n~ = (86.09 · [γBL]~c~ + 114.14 · [εCL]~c~)/3[Al(O^i^Pr)~3~] + 60.10}. ^13^C NMR and DSC data are indicative of a pseudoperiodic or random copolymer structure.