单模聚焦微波作用下端炔基修饰的聚(L-丙交酯)的合成与表征  

Synthesis and characterization of alkynyl terminated poly(L-lactide) under single-mode focus microwave radiation

作　　者：徐湾[1] 罗丙红[1] 李建华[1] 李彩荣[1] 文伟[1] 周长忍[1,2] 

机构地区：[1]暨南大学材料科学与工程系,广东广州510630 [2]暨南大学人工器官与材料教育部工程中心,广东广州510630

出　　处：《功能材料》2013年第9期1338-1341,1345,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(81171459);广东省自然科学基金资助项目(10151063201000033);暨南大学科研培育与创新基金资助项目(11611439)

摘　　要：在单模聚焦微波辐射作用下,以辛酸亚锡为催化剂,炔丙醇为小分子引发剂引发L-丙交酯开环聚合合成了端炔基修饰的聚(L-丙交酯)。通过正交实验考察了各种反应条件对产物产率的影响,得出最佳的聚合反应条件如下:反应温度110℃,微波功率45W,辐照时间45min,催化剂用量0.1%。在此基础上,通过改变n(L-丙交酯)∶n(炔丙醇)投料比合成了一系列端炔基修饰的聚(L-丙交酯),通过FT-IR、1H NMR、DSC、XRD和GPC对其结构与性能进行了研究。结果表明,在微波作用下,快速、高效地合成了端炔基修饰的聚(L-丙交酯)目标产物,且产物的结构与性能可以通过改变n(L-丙交酯)∶n(炔丙醇)投料比在一定程度上进行调控,随着L-丙交酯投料量增大,产物的分子量逐渐增大,熔点逐渐升高。Alkynyl terminated poly（L-lactide） was synthesized by the bulk ring-opening polymerization of Lqactide under single-mode focus microwave radiation using stannous octoate （Sn（Oct）2） as a catalyst and propargyl alcohol as a co-initiator. The optimal synthesis conditions obtained by an orthogonal experiment were as fol- lows： temperature of 110℃, microwave power of 45W, irradiation time of 45min and catalyst concentration of 0. 1mol%. Furthermore, a series of alkynyl terminated poly（L-lactide） have been synthesized rapidly and efficiently by changing n（propargyl alcohol）/n（L-laeticle） feed ratio. The structure and properties of the product were studied by IR,1H NMR,XRD,DSC and GPC. Results showed that the structure and properties of the alkynyl terminated poly（L-lactide） can be controlled by changing the n （propargyl alcohol）/n （L-lactide） feed ratio, with the L-lactide content increased, the molecular weight and melting point increased.

关 键 词：聚(L-丙交酯) 端炔基修饰 微波合成 点击化学 

分 类 号：O633.1[理学—高分子化学]