乙二胺改性聚乳酸的直接熔融缩聚法合成研究  

Study on Direct Melt Polycondensation and Synthesis of PLA Modified by Ethylenediamine

作　　者：陈佑宁[1] 张知侠[1] 

机构地区：[1]咸阳师范学院化学与化工学院,陕西咸阳712000

出　　处：《塑料工业》2011年第7期20-23,共4页China Plastics Industry

基　　金：陕西省自然科学基金项目(2004B13);咸阳师范学院专项科研基金项目(06XSYK105)

摘　　要：采用直接熔融缩聚法将乙二胺对乳酸预聚体进行改性。探讨了反应温度、催化剂类型及用量、反应时间对产物摩尔质量的影响,并用红外光谱和示差扫描量热法(DSC)对产物进行了表征。结果表明,在170℃反应8 h,乙二胺与乳酸的体积比为8∶100,辛酸亚锡为催化剂,产物摩尔质量有了较大提高,并保持着较好的亲水性能。Hydroxy acid pre-polymer was modified by ethylene diamine via direct melt polycondensation. Influences of the reaction temperature, catalyst type and reaction time on molecular weight were studied. The products were characterized by FTIR and DSC. The results showed that molecular weight of products greatly improved and maintained a good hydrophilic properties, under the condition of ethylene diamine and the volume of lactic acid ratio of 8 ： 100, stannous octoate as a catalyst, at 170℃ for 8 h.

关 键 词：聚乳酸 端羟基乳酸预聚体 直接熔融缩聚 乙二胺 

分 类 号：TQ316.33[化学工程—高聚物工业]