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Oligomerization and copolymerization of γ‐butyrolactone — a monomer known as unable to homopolymerize, 1. Copolymerization with ε‐caprolactone
Author(s) -
Duda Andrzej,
Penczek Stanislaw,
Dubois Philippe,
Mecerreyes David,
Jérôme Robert
Publication year - 1996
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1996.021970408
Subject(s) - copolymer , polymer chemistry , monomer , caprolactone , chemistry , polymer , organic chemistry
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.