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Synthesis of CO 2 ‐based functional poly(carbonate‐co‐lactide)
Author(s) -
Chen Yao,
Wang Wenchuan,
Xie Dong,
Wu Lili,
Zhang Chaocan
Publication year - 2021
Publication title -
journal of polymer science
Language(s) - English
Resource type - Journals
eISSN - 2642-4169
pISSN - 2642-4150
DOI - 10.1002/pol.20210130
Subject(s) - copolymer , cyclohexene oxide , epoxide , polymer chemistry , carbonate , propylene oxide , lactide , chemistry , materials science , catalysis , organic chemistry , ethylene oxide , polymer
TPPAlCl‐PPN + Cl − binary catalyst (where TPPAlCl is 5,10,15,20‐tetraphenylporphyrin aluminum chloride, PPN + Cl − is bis[triphenylphosphine] iminium chloride, the molar ratio of TPPAlCl to PPN + Cl − is 1 to 0.5) can initiate the effective one‐pot/one‐step ternary copolymerization of CO 2 , lactide and 4‐vinyl‐1‐cyclohexene‐1,2‐epoxide, and the quaternary copolymerization of CO 2 , propylene oxide, lactide, 4‐vinyl‐1‐cyclohexene‐1,2‐epoxide, to form multiblock poly(carbonate‐co‐lactide) products with pendant vinyl group. The ternary copolymerization product composes of polylactide (PLA) block and poy(vinylcyclohexylene carbonate) (PVCHC) block, and the quaternary copolymerization product composes of poy(propylene carbonate) (PPC) block, PLA block and PVCHC block, which are verified by 1 H NMR, 13 C NMR, 1 H‐ 1 H cosy, hetero‐nuclear multiple bond correlation, DTG, and Gel permeation chromatography analysis. The functionality and glass‐transition temperature of the products can be easily adjusted by the copolymerization variables, such as the molar ratio of comonomers, copolymerization temperature, pressure of CO 2 , the concentration of the catalyst.