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Titolo:
Studies on syntheses and physical characterization of biodegradable aliphatic poly(butylene succinate-co-epsilon-caprolactone)s
Autore:
Cao, A; Okamura, T; Ishiguro, C; Nakayama, K; Inoue, Y; Masuda, T;
Indirizzi:
Chinese Acad Sci, Shanghai Inst Organ Chem, Dept Polymer Mat, Shanghai 200032, Peoples R China Chinese Acad Sci Shanghai Peoples R China 200032 200032, Peoples R China AIST, Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan AIST Tsukuba Ibaraki Japan 3058565 chnol, Tsukuba, Ibaraki 3058565, Japan Sci Univ Tokyo, Dept Ind Chem, Noda, Chiba 2788510, Japan Sci Univ Tokyo Noda Chiba Japan 2788510 Chem, Noda, Chiba 2788510, Japan Tokyo Inst Technol, Dept Biomol Engn, Midori Ku, Yokohama, Kanagawa 2268501, Japan Tokyo Inst Technol Yokohama Kanagawa Japan 2268501 anagawa 2268501, Japan
Titolo Testata:
POLYMER
fascicolo: 3, volume: 43, anno: 2002,
pagine: 671 - 679
SICI:
0032-3861(200202)43:3<671:SOSAPC>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
CO-ETHYLENE SUCCINATE)S; POLY(TETRAMETHYLENE SUCCINATE); POLYESTERS; POLYMERIZATION; BEHAVIOR; HYDROLYSIS; KINETICS; BLENDS;
Keywords:
biodegradable aliphatic PBSC; polycondensation; physical properties;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Cao, A Chinese Acad Sci, Shanghai Inst Organ Chem, Dept Polymer Mat, 354 Fenglin Rd, Shanghai 200032, Peoples R China Chinese Acad Sci 354 Fenglin RdShanghai Peoples R China 200032 na
Citazione:
A. Cao et al., "Studies on syntheses and physical characterization of biodegradable aliphatic poly(butylene succinate-co-epsilon-caprolactone)s", POLYMER, 43(3), 2002, pp. 671-679

Abstract

Biodegradable aliphatic poly(butylene succinate-co-epsilon -caprolactone) (PBSCs) were synthesized through a polycondensation with titanium tetraisoproxide (TTP), diphenylphosphinic acid (DPPA) and stannous octoate (Sn(Oct)(2)) as the novel co-catalysts. By means of gel permeation chromatography (GPC) and nuclear magnetic resonance spectrometer (NMR), it was revealed thatthe PBSC copolyesters had number average molecular weights Al higher than 5.0 x 10(4), and that the polycondensations were in well agreement with a random copolymerization model. With respect to thermal properties, melting point, heat of fusion and glass transition temperature were found to decrease with increasing the CL/BS unit molar ratio up to 0.92, while thermal stability monotonously decreased with increasing the CL unit population spanning the whole CL unit composition. X-ray diffraction patterns indicated that the BS-rich/CL-rich PBSC organized the corresponding PBS/PCL-type of crystal structure. Moreover, it is worth to note that the PBS copolymerized with an appropriate amount of the minor CL component could significantly increase the fracture elongation of the resultant PBSC, and that mechanical properties of PBSC strongly depended on its CL unit population. In addition, biodegradabilities of PBSCs as well as PBS and PCL were tentatively assessed ina kind of compost soil, and the results suggest that chain flexibility mayplay an important role in the biodegradation as another factor besides thespecificity of unit chemical structure and morphology. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 29/05/20 alle ore 13:23:23