摘要
以聚乙二醇－４０００钾盐为引发剂．合成了食不同长度聚醚链段的聚Ｄ．Ｌ－乳酸－聚乙二醇－聚Ｄ．Ｌ－乳酸（ＰＬＡ－ＰＥＧ－ＰＬＡ）三嵌段共聚物。考察了溶剂用量、引发剂用量、反应温度和时间、ＰＥＧ分子量、不同溶剂对聚合反应的影响。以１Ｈ－ＮＭＲ、ＩＲ、ＤＳＣ、ＧＰＣ对共聚物进行了表征。
Poly(D.L)lactide-Poly(ethylene glycol)triblock copolymer(PLA-PEGPLA)was synthesized with the initiator of potassium poly(ethylene glycol)ate.The effect of the amount of solvent and initiator.reaction time and temperature.sort of solvent and molecular weight of PEG on the polymerization reaction were studied. A effort of copolymerization of D. L-lactide with relatively low molecular weight of PEG was made in THF solution. The copolymers were characterized by GPC. DSC.IR、1 H-NMR.
出处
《合成技术及应用》
1996年第2期11-16,共6页
Synthetic Technology & Application
