摘要
以L-丙交酯为原料,辛酸亚锡和三苯基膦为催化体系,利用双螺杆挤出机快速制备具有一定分子量的聚乳酸。研究了聚合时间、聚合温度、螺杆转速以及催化剂含量对聚合产物性质的影响。结果表明,在双螺杆转速110 r/min,聚合温度170℃,单体与催化剂摩尔比为2 000:1条件下,聚合1.5 h,能获得粘均分子量约为4.9万、光学纯度达到93%的聚乳酸。
The poly（L-lactic acid） （PLLA） was rapidly synthesized from L-lactide （L-LA） by using 2- ethylhexanoic acid tin（II） salt and triphenylphosphine as the catalyst system and using a twin-screw ex- truder as a reactor. The effects of the polymerization time, polymerization temperature, the screw speed and the catalyst content on polymer properties were investigated. The results showed that when the twin-screw speed was 110 r/min, the polymerization temperature was 170 ℃, the molar ratio of monomer/catalyst was 2 000 ： 1 and the polymerization time was 1.5 h, the PLLA polymer with a molecular weight of about 49 000 and optical purity of 93% could be obtained.
出处
《应用化工》
CAS
CSCD
2012年第11期1872-1876,共5页
Applied Chemical Industry
基金
国家自然科学基金资助(51173025)
关键词
L-丙交酯
双螺杆挤出机
开环聚合
L-lactide
twin-screw extruder
ring-opening polymerization
