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Hydroxy‐telechelic copolyesters with well defined sequence structure through ring‐opening polymerization
Author(s) -
Lendlein Andreas,
Neuenschwander Peter,
Suter Ulrich W.
Publication year - 2000
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 - 10.1002/1521-3935(20000701)201:11<1067::aid-macp1067>3.0.co;2-y
Subject(s) - polymer chemistry , diol , monomer , ring opening polymerization , ethylene glycol , polymerization , sequence (biology) , copolymer , caprolactone , ring (chemistry) , molar mass distribution , chemistry , catalysis , telechelic polymer , materials science , end group , polymer , organic chemistry , biochemistry
New well‐defined macrodiols were prepared by ring‐opening copolymerization of lactones and cyclic diesters with a low molecular weight diol. Suitable monomers are diglycolide, L,L ‐dilactide, ε ‐caprolactone, and rac ‐β‐butyrolactone. With exception of rac ‐ β ‐butyrolactone, the reaction can be performed with or without a catalyst. The use of a catalyst influences the sequence structure of the telechelics. Copolyesterdiols from ε ‐caprolactone, diglycolide, and ethylene glycol with random, blocky, and intermediate structure were synthesized and characterized. The analogous copolyesterdiols from L,L ‐dilactide, ε ‐caprolactone, and ethylene glycol were also prepared. The sequence structure of the random chains with diglycolide corresponds to a random distribution of glycolate units, that of the corresponding chains with L,L ‐dilactide exhibit a random distribution of L,L ‐dilactate units.