Zeolitic Imidazolate Framework-67 Efficiently Catalyzes the Ring-Opening Polymerization of L-Lactide

Chinese Journal of Applied Chemistry

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Zeolitic Imidazolate Framework-67 Efficiently Catalyzes the Ring-Opening Polymerization of L-Lactide

ZHU Chenyang^a,LUO Zhixiong^b,CHEN Cheng^b,Chaemchuen Somboon^a^b,Verpoort Francis^a^b^*()

^aSchool of Materials Science and Engineering
^bState Key Laboratory of Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China

Received:2018-12-14 Published:2019-04-01
Contact: Verpoort Francis
Supported by:
Supported by the National Natural Science Foundation of China(No.21850410449)

Abstract

Abstract:

To explore the metal effecting in structure of zeolitic imidazolate frameworks(ZIFs) influenced to its catalytic activity, we have synthesized ZIF-8, Zn/Co-ZIF and ZIF-67 by room temperature method and applied them as catalysts for the bulk ring-opening polymerization of L-lactide. Under the same reaction condition, ZIF-67 shows the highest catalytic activity. Compared to 2-methylimidazolate(linker) as a catalyst under the same reaction condition, the poly(lactic acid) obtained with ZIF-67 has highly isotactic structure. In addition, the matrix assisted laser desorption ionization-time of flight(MALDI-TOF) mass spectrum indicate that the poly(lactic acid) obtained with ZIF-67 has an almost linear structure. ZIF-67 can be reused for three times without significantly loss of catalytic activity.

Key words: ring-opening polymerization, poly(lactic acid), zeolitic imidazolate framework-67, heterogeneous catalysis

ZHU Chenyang, LUO Zhixiong, CHEN Cheng, Chaemchuen Somboon, Verpoort Francis. Zeolitic Imidazolate Framework-67 Efficiently Catalyzes the Ring-Opening Polymerization of L-Lactide[J]. Chinese Journal of Applied Chemistry.

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Zeolitic Imidazolate Framework-67 Efficiently Catalyzes the Ring-Opening Polymerization of L-Lactide

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