Journal
CHINESE JOURNAL OF POLYMER SCIENCE
Volume 40, Issue 9, Pages 1028-1033Publisher
SPRINGER
DOI: 10.1007/s10118-022-2727-z
Keywords
Dinuclear Salen-Cr(III) complex; Poly(propylene carbonate); Polylactide; Gradient and random copolymers
Categories
Funding
- National Key R&D Program of China [2021YFA1501700]
- National Natural Science Foundation of China, Basic Science Center Program [51988102]
- National Natural Science Foundation of China [52073272]
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A new dinuclear Salen-Cr(III) complex was designed in this study, which exhibited higher efficiency for copolymerization of propylene oxide/carbon dioxide and lactide, and gradient and random copolymers of PPC-PLA were successfully synthesized.
Copolymerization of propylene oxide (PO)/carbon dioxide (CO2) and lactide (LA) is achievable to form new copolymers, combining the advantages of both poly(propylene carbonate) (PPC) and polylactide (PLA). In this study, we designed a dinuclear Salen-Cr(III) complex, which showed higher efficiency for copolymerization of PO/CO2 and LA than that of mononuclear Salen-Cr(III) complex. Besides, we successfully obtained gradient and random copolymers of PPC-PLA in one pot. Furthermore, by adjusting reaction temperature, block ratios of PPC/PLA in copolymers were controllable (block ratio of PPC/PLA=1.0 at 40 degrees C, while block ratio of PPC/PLA=0.5 at room temperature). While increasing the reaction temperature to 60 degrees C, conversion of LA was much faster than that of PO so that gradient copolymers were obtained.
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