PREPARATION AND PROPERTIES OF POLY(LACTIC ACID-CO-GLYCOL TEREPHTHALIC ACID)COPOLYESTER  

作　　者：GAO Cuili JI Quan KONG Qingshan XIA Yanzhi 

机构地区：[1]Advanced fibers and Modern Textile Cultivation Base for State Key Laboratory,College of Chemical Engineering, Qingdao University, Qingdao 266071, China

出　　处：《Chinese Journal of Reactive Polymers》2006年第1期63-69,共7页中国反应性高分子（英文版）

基　　金：NSFC(50373022),ShandongNaturalScienceFoundation,QingdaoScienceResearchFoundation

摘　　要：To obtain a kind of biodegradable polymer material with satisfactory properties, a new biodegradable copolyester poly（lactic acid-co-glycol terephthalate） （PETA）, was synthesized from three monomers of lactic acid, glycol and terephthalic acid. The resulting copolyesters, PETA, were characterized by FT-IR, ^1H-NMR, DSC, TGA and by the ways of weight loss rate to characterize their biodegradability. The findings in this work indicated that, the Tins and Tas of copolyesters PETA increased with increasing contents of the terephthalic acid units. From the biodegradation tests in natural soil, boiling water, acid buffer solution and alkali buffer solution, it was shown that the biodegradability of copolyesters PETA decreased with increasing contents of the terephthalic acid units.To obtain a kind of biodegradable polymer material with satisfactory properties,a new biodegradable copolyester poly(lactic acid-co-glycol terephthalate)(PETA),was synthesized from three monomers of lactic acid,glycol and terephthalic acid.The resulting copolyesters,PETA,were characterized by FT-IR,1H-NMR,DSC,TGA and by the ways of weight loss rate to characterize their biodegradability.The findings in this work indicated that,the Tms and Tds of copolyesters PETA increased with increasing contents of the terephthalic acid units.From the biodegradation tests in natural soil,boiling water,acid buffer solution and alkali buffer solution,it was shown that the biodegradability of copolyesters PETA decreased with increasing contents of the terephthalic acid units.

关 键 词：Lactic acid GLYCOL Terephthalic acid COPOLYESTER Thermal properties Biodegradability. 

分 类 号：O63[理学—高分子化学]