共聚酯
共聚物
单体
乙醇酸
聚合
开环聚合
丙交酯
化学
高分子化学
材料科学
乳酸
聚酯纤维
有机化学
聚合物
细菌
生物
遗传学
作者
Sicheng Chen,Zhaowei Jia,Luya Cao,Yuju Li,Xinning Han,Xiaobo Pan,Jincai Wu
出处
期刊:Macromolecules
[American Chemical Society]
日期:2021-10-01
卷期号:54 (19): 9027-9038
被引量:4
标识
DOI:10.1021/acs.macromol.1c01397
摘要
Synthesizing different sequence-type bio-polyesters is a valuable and challenging task via a living polymerization method. In this work, a highly heteroselective ring-opening polymerization of rac-benzylglycolide was reported with a high Pr value of 0.94. Then, a stereospecific method was utilized to synthesize the first AABB-type sequence-controlled bio-polyester of lactic acid and benzyl glycolic acid via the alternating polymerization of l-lactide (L-LA) and d-benzylglycolide (D-BG) with a high alternating level of 94%. Importantly, it is pointed out in this work that the alternating level of copolymer is an average value of two alternating probabilities after two different monomer units of lactic acid and benzyl glycolic acid in the polymer chain, respectively. The alternating probability after different monomer units can be calculated using 13C NMR and 1H NMR spectra, which also can be verified by a chain end ratio analysis method. The high alternating level of copolymer of L-LA and D-BG can be further confirmed via the analysis of its MALDI-TOF-mass spectrum.
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