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《高分子科学(英文版)》 2018-02
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Synthesis of Ultraviolet Absorption Polylactide via Immortal Polymerization of rac-Lactide Initiated by a Salan-yttrium Catalyst

Wei Zhao;Chuan-Yang Li;Chun-Ji Wu;Xin-Li Liu;Ze-Huai Mou;Chang-Guang Yao;Dong-Mei Cui;State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences;College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology;University of Chinese Academy of Sciences, Changchun Branch;  
A highly efficient strategy for the synthesis of polylactide with the UV absorption ability was established by employing a Salan-yttrium complex(acting as a fast runing catalyst) combined with large excess hydroxyl functionalized benzophenone, BP′-OH. During polymerization, BP′-OH, acting as the chain transfer agent, attached to the active rare-earth metal catalyst via a rapid-reversible exchange reaction to initiate the polymerization. Thus, more polyester chains appeared to grow from one active metal species, and the UV absorption fragments were incorporated into the polymer chains at specific sites, in situ. A high productivity up to 1000 mol LA/mol(Salan-Y) was successfully achieved and 100 BP′-labeled PLA chains grew from each active metal center.
【Fund】: financially supported by the National Natural Science Foundation of China (Nos. 21361140371 51021003 21774119 and 21774071)
【CateGory Index】: O631.5
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