离子液体/氯化亚锡催化合成聚乳酸的研究  

Catalytic synthesis of poly(lactic acid) with ionic liquid/stannous chloride as catalyst

作　　者：陈春明[1] 

机构地区：[1]韩山师范学院化学系,广东潮州521041

出　　处：《合成纤维工业》2009年第6期5-7,共3页China Synthetic Fiber Industry

基　　金：韩山师范学院博士启动项目(510038);广东省自然科学基金资助项目(7301526)

摘　　要：以离子液体氯化1-丁基-3-甲基咪唑盐（[Bmim]Cl）和氯化亚锡（SnCl2）的复盐为催化剂，L-乳酸为原料，采用直接溶液缩聚法制备聚乳酸（PLA）；探讨了催化剂用量、反应温度及反应时间对PLA相对分子质量的影响，借助红外光谱和核磁共振氢谱对聚合物进行了表征。结果表明：当反应体系真空度约1kPa，[Bmim]CI／SnCl2催化剂质量分数为反应物的0．7％，[Bmim]C1与SnCl2的摩尔比为1：2，反应温度170℃，反应时间12h时，制备的PLA的粘均相对分子质量为3．5×10^4。Poly（ lactic acid） （PLA） was prepared from L- lactic acid in presence of the composite catalyst of 1 -bury L- -3-meth- ylimidazolium chloride （ [ Bmim] Cl） ionic liquid and stannous chloride （SnCl2 ） via direct solution condensation. The effects of catalyst amount and reaction temperature and time on the relative molecular mass of PLA were discussed. The polymer was char- acterized with infrared spectrum and nuclear magnetic resonance spectrum. The results showed that the obtained PLA had the vis- cosity average relative molecular mass of 3.5 × 10^4 when the reaction conditions were as followed： reaction system vacuum about 1 kPa, 0.7% [ Bmim] Cl/SnC12 catalyst of the reactants by mass fraction, [ Bmim] Cl-and-SnCl2 mole ratio of 1 ： 2, reaction temperature 170 ℃ and time 12 h.

关 键 词：离子液体 氯化亚锡 催化剂 缩聚 聚乳酸 合成 

分 类 号：TQ316.33[化学工程—高聚物工业]