Premium
Polymerization of Lactides and Lactones, 9. Synthesis and Characterization of Novel Random Copolyesters Containing 5‐Phenyl‐ε‐caprolactone Units
Author(s) -
Yuan Minglong,
Li Xiaohong,
Liu Yalin,
Deng Xianmo
Publication year - 2001
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(20010201)202:4<546::aid-macp546>3.0.co;2-z
Subject(s) - copolymer , monomer , polymer chemistry , chemistry , polymerization , oligomer , caprolactone , molar mass distribution , ring opening polymerization , nuclear chemistry , polymer , organic chemistry
3‐Ph‐CL and 5‐Ph‐CL can copolymerize with LA or CL initiated by Sn(Oct) 2 in bulk at 150°C. The copolymerization of 3‐Ph‐CL with LA and CL only produced oligomer. High molecular weight P(5‐Ph‐CL)‐PLA and P(5‐Ph‐CL)‐PCL were obtained by copolymerizing 5‐Ph‐CL with LA or CL. The copolymerization of 5‐Ph‐CL with CL, the content of P(5‐Ph‐CL) is in agreement with the feed ratio. However, in the case of 5‐Ph‐CL with LA, irrespectively of the monomer feed ratio, the content of P(5‐Ph‐CL) in the copolymer is less than that in the monomer feed. The 5‐Ph‐CL feed ratio has little influence on the molecular weight and the molecular weight distribution of P(5‐Ph‐CL)‐PCL and P(5‐Ph‐CL)‐PLA, but with the increase of 5‐Ph‐CL feed ratio, the yield of copolymer decreases. The DSC study of P(5‐Ph‐CL)‐PLA and P(5‐Ph‐CL)‐PCL indicated that the content of P(5‐Ph‐CL) affects the properties of the copolymer. When the content of P(5‐Ph‐CL) reaches 50%, both copolymers became rubber‐like and non‐crystalline.