Biodegradable aliphatic/aromatic copolymers based on terephthalic acid and poly(L-lactic acid): Synthesis, characterization and hydrolytic degradation

Wang, Bing-tao and Zhang, Yan and Song, Pingan and Guo, Zhenghong and Cheng, Jie and Fang, Zhengping (2010) Biodegradable aliphatic/aromatic copolymers based on terephthalic acid and poly(L-lactic acid): Synthesis, characterization and hydrolytic degradation. Chinese Journal of Polymer Science, 28 (1). pp. 405-415. ISSN 0256-7679

Abstract

Biodegradable aliphatic/aromatic copolyesters, poly(butylene terephthalate-co-lactate) (PBTL) were prepared via direct melt polycondensation of terephthalic acid (TPA), 1,4-butanediol (BDO) and poly(L-lactic acid) oligomer (OLLA). The effects of polymerization time and temperature, as well as aliphatic/aromatic moiety ratio on the physical and thermal properties were investigated. The largest molecular weight of the copolyesters was up to 64100 with molecular weight distribution index of 2.09 when the polycondensation was carried out at 230°C for 6 h. DSC, XRD, DMA and TGA analysis clearly indicated that the degree of crystallinity, glass-transition temperature, melting point, decomposition temperature, tensile strength, elongation and Young's modulus were influenced by the ratio between TPA and OLLA in the final copolyesters. Hydrolytic degradation results demonstrated that the incorporation of biodegradable lactate moieties into the aromatic polyester could efficiently improve hydrolytic degradability of the copolymer even though it still had many aromatic units in the main chains.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 08 Aug 2019 00:29
Last Modified: 09 Aug 2019 04:59
Uncontrolled Keywords: aliphatic/aromatic copolyesters, direct melt polycondensation, iodegradable
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8699 Other Manufacturing > 869999 Manufacturing not elsewhere classified
Identification Number or DOI: 10.1007/s10118-010-9032-y
URI: http://eprints.usq.edu.au/id/eprint/35578

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