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Biodegradability of Poly(ethylene terephthalate) Copolymers with Poly(ethylene glycol)s and Poly(tetramethylene glycol)

1996; Wiley; Volume: 39; Issue: 2 Linguagem: Inglês

10.1002/(sici)1097-0126(199602)39

1097-0126

Minoru Nagata, Tsuyoshi Kiyotsukuri, Susumu Minami, Naoto Tsutsumi, Wataru Sakai,

Polymer crystallization and properties

Polymer InternationalVolume 39, Issue 2 p. 83-89 Article Biodegradability of poly(ethylene terephthalate) copolymers with poly(ethylene glycol)s and poly(tetramethylene glycol) Minoru Nagata, Corresponding Author Minoru Nagata Junior Women's College, Kyoto Prefectural University, Shimogamo, Sakyoku, Kyoto 606, JapanJunior Women's College, Kyoto Prefectural University, Shimogamo, Sakyoku, Kyoto 606, JapanSearch for more papers by this authorTsuyoshi Kiyotsukuri, Tsuyoshi Kiyotsukuri Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyoku, Kyoto 606, JapanSearch for more papers by this authorSusumu Minami, Susumu Minami Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyoku, Kyoto 606, JapanSearch for more papers by this authorNaoto Tsutsumi, Naoto Tsutsumi Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyoku, Kyoto 606, JapanSearch for more papers by this authorWataru Sakai, Wataru Sakai Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyoku, Kyoto 606, JapanSearch for more papers by this author Minoru Nagata, Corresponding Author Minoru Nagata Junior Women's College, Kyoto Prefectural University, Shimogamo, Sakyoku, Kyoto 606, JapanJunior Women's College, Kyoto Prefectural University, Shimogamo, Sakyoku, Kyoto 606, JapanSearch for more papers by this authorTsuyoshi Kiyotsukuri, Tsuyoshi Kiyotsukuri Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyoku, Kyoto 606, JapanSearch for more papers by this authorSusumu Minami, Susumu Minami Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyoku, Kyoto 606, JapanSearch for more papers by this authorNaoto Tsutsumi, Naoto Tsutsumi Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyoku, Kyoto 606, JapanSearch for more papers by this authorWataru Sakai, Wataru Sakai Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyoku, Kyoto 606, JapanSearch for more papers by this author First published: February 1996 https://doi.org/10.1002/(SICI)1097-0126(199602)39:2 3.0.CO;2-CCitations: 47AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Poly(ethylene terephthalate) copolymers were prepared by melt polycondensation of dimethyl terephthalate and excess ethylene glycol with 10–40mol% (in feed) of poly(ethylene glycol) (E) and poly(tetramethylene glycol) (B), with molecular weight (MW) of E and B 200–7500 and 1000, respectively. The reduced specific viscosity of copolymers increased with increasing MW and content of polyglycol comonomer. The temperature of melting (Tm), cold crystallization and glass transition (Tg) decreased with the copolymerization. Tm depression of copolymers suggested that the E series copolymers are the block type at higher content of the comonomer. Tg was decreased below room temperature by the copolymerization, which affected the crystallinity and the density of copolymer films. Water absorption increased with increasing content of comonomer, and the increase was much higher for E1000 series films than B1000 series films. The biodegradability was estimated by weight loss of copolymer films in buffer solution with and without a lipase at 37°C. The weight loss was enhanced a little by the presence of a lipase, and increased abruptly at higher comonomer content, which was correlated to the water absorption and the concentration of ester linkages between PET and PEG segments. The weight loss of B series films was much lower than that of E series films. The abrupt increase of the weight loss by alkaline hydrolysis is almost consistent with that by biodegradation. Citing Literature Volume39, Issue2February 1996Pages 83-89 RelatedInformation