由环己烷二甲醇和低聚乳酸制备脂肪/芳香共聚酯  

Preparation of Aliphatic/Aromatic Copolyesters Based on Cyclohexanedimethanol and Oligo(lactic acid)

作　　者：巫民建[1,2] 苏吉英[1] 陈义旺[1] 贺晓慧[1] 周魏华[1] 

机构地区：[1]南昌大学高分子研究所,南昌330031 [2]江西化学工业研究所,南昌

出　　处：《应用化学》2009年第7期766-769,共4页Chinese Journal of Applied Chemistry

基　　金：教育部新世纪优秀人才计划(NCET-06-0574);南昌大学创新团队计划

摘　　要：由对苯二甲酸二甲酯(DMT)、1,6-己二醇(HDO)以及1,4-环己烷二甲醇(CHDM)和α-羟基-ω-羧基DL-低聚乳酸(OLA)在催化剂钛酸四丁酯下熔融缩聚合成了一系列可生物降解共聚酯聚(对苯二甲酸环己烷二甲醇酯-co-对苯二甲酸己二酯-co-乳酸)(PHCTL)。采用核磁共振仪(1HNMR)、差示扫描量热仪(DSC)、热重分析(TG)和广角X射线衍射(WAXS)测试技术对共聚酯进行了表征。结果表明,共聚酯的熔点(Tm),比聚(对苯二甲酸己二醇酯-co-乳酸)(PHTL)增加40～120℃,热分解温度(Td)增加20～40℃。当环己烷二甲醇在二元醇投料中占30%～70%%时,由凝胶渗透色谱(GPC)分析测得共聚酯的分子量在1.7×104～3.6×104之间。PHCTL共聚酯37℃时在磷酸缓冲液中10d后降解10%,而PHTL则为7%,PHCTL共聚酸的杨氏模量为242MPa。A new series of biodegradable copolyesters, PHCTL, were synthesized via polycondensation from dimethyl terephthalate （ DMT ）, 1,6-hexanediol （ HDO ）, （ lactic acid） （OLA） in the presence of activator tetrabutyl 1,4-cyclohexanedimethanol （ CHDM ） and oligo titanate. The resulting copolyesters, PHCTL, were characterized by ^1 H NMR, differential scanning calorimetry （ DSC ）, thermogravimetry （TG） and wide-angle X-ray scattering（WAXS）. The melting temperature （ Tm, ） and thermal decomposition temperature （ Td ） of the copolyesters increased obviously with increased of the CHDM content. In comparison with the copolyesters without CHDM involved, the Tm and Td of the copolyesters with a feeding ratio of 50/50 CHDM/HDO increased from 129 ℃ and 361 ℃ to 219 if2 and 383 ℃, respectively. The molecular mass of the copolyesters varied in a range of 1.7 × 10^4 - 3.6 × 10^4 g/tool. The copolyesters were distinctly degraded in phosphate buffer solution at 37 ℃ （ 10% mass loss after 10 days, 7% for PHTL）. The degradation rates of the copolyesters were dependent on their hydrophilicity. The Young module of PHCTL is 242 MPa.

关 键 词：共聚酯 生物降解 乳酸 酯交换 

分 类 号：O632.1[理学—高分子化学]