详细信息
文献类型:期刊文献
中文题名:三步法合成高封端率端氨基聚乳酸
英文题名:Synthesis of Amino-Terminated Poly(Lactic Acid)
作者:于博昊[1];龚飞荣[1];赵燕超[1];饶炬[1];程树军[1]
机构:[1]华东理工大学材料科学与工程学院,超细材料制备与应用教育部重点实验室,上海200237
年份:2008
卷号:21
期号:2
起止页码:182
中文期刊名:功能高分子学报
外文期刊名:Journal of Functional Polymers
收录:CSTPCD;;北大核心:【北大核心2004】;CSCD:【CSCD2011_2012】;
基金:上海市科委资助项目(044319213)
语种:中文
中文关键词:聚乳酸;端基改性;赖氨酸
外文关键词:poly(lactic acid) ; end-modification; lysine
摘要:叔丁氧羰基碳酸酐((Boc)2O)和氨基丙醇反应合成叔丁氧羰基氨基丙醇(Boc-氨基丙醇),以此为引发剂在辛酸亚锡的催化下,引发L-丙交酯开环聚合合成叔丁氧羰基氨基封端聚乳酸(BocNH-PLLA),叔丁氧羰基(Boc)经三氟乙酸处理脱除后得到端氨基聚乳酸(PLLA-NH2)。以PLLA-NH2为大分子引发剂,引发ω-苄氧羰基L-赖氨酸-N-羧酸酐(ω-Z-L-Lysine-NCA)开环聚合,合成聚L-乳酸-聚ω-苄氧羰基L-赖氨酸两嵌段共聚物(P(LLA-LLz))。采用红外光谱(FT-IR)、核磁共振氢谱(1H-NMR)、凝胶渗透色谱(GPC)对聚合物结构进行了表征。结果表明:PL-LA-NH2端基亲核性明显提高,可引发ω-Z-L-Lysine-NCA开环聚合制备嵌段共聚物,PLLA-NH2的合成方法简便,氨基封端率高,其分子量和单体与引发剂的摩尔比具有良好的线性关系。
Amino-terminated poly(lactic acid) was synthesized in three steps: (1) protection of the amino group in amino propanol by Boc group; (2) ring opening polymerization of L lactide with Boe amino pro- panol as an initiator and Sn(Oct)2 as a catalyst; (3) dcprotection of the t3oc group. The nucleophilicityof amino-terminatal poly(lactic acid) was estimated as a macroinitiator by initiating the polymerization of N-carboxyanhydride of ω-benzyloxycarbonyl-L-lysine. The polymers were characterized by FT IR, ^1HNMR and GPC. The results show that the synthesis of amino-termed poly(lactic acid) can be easily carried out with high amino ratio and each length of the block can he controlled from the ratio of monomer to initiator.
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