摘要
在微波辐射条件下,以L-乳酸为原料抽真空直接合成低分子量聚乳酸。根据微波辐射的特点制作了两口 长颈反应釜,考察单体纯度、催化剂种类和用量、聚合时间、聚合温度等因素对聚L-乳酸粘均分子量的影响,确 定了最佳工艺;并采用IR、1H NMR和13C NMR等测试手段对聚合产物进行了结构表征。
Poly（ latic acid ） was synthesized by L-latic acid in vacumme under microwave irradiation. According as the characteristics of microwave heat, the hong-neck reactor with two oralia was designed.Effect factors on viscosity-average molecular weight of Poly（L-latic acid ） such as monomer purity, the variety and quantity of catalyst, polymerizing time and temperature were studied.Optimum technology was established.The product was characterized by IR, ^1H NMR and ^13C NMR.
出处
《齐齐哈尔大学学报（自然科学版）》
2005年第4期17-20,共4页
Journal of Qiqihar University(Natural Science Edition)
关键词
微波辐射
聚乳酸
低分子量
microwave radiation
Poly（ latic acid ）
Low-molecular weight
