ALTERNATING COPOLYMERIZATION OF CYCLOHEXENE OXIDE AND CARBON DIOXIDE UNDER COBALT PORPHYRIN CATALYST
Cobalt porphyrin complexes (TPPConIX) (TPP = 5,10,15,20-tetraphenyl-porphyrin; X = halide) in combination with bis(triphenylphosphine) iminium chloride (PPNC1) were used for the eopolymerization of cyelohexene oxide and CO2. The highest turnover frequency of 67.2 h^-1 was achieved after 13 h at 20℃,...
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Published in | Chinese journal of polymer science Vol. 29; no. 5; pp. 602 - 608 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Heidelberg
Chinese Chemical Society and Institute of Chemistry, CAS
01.09.2011
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Subjects | |
Online Access | Get full text |
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Summary: | Cobalt porphyrin complexes (TPPConIX) (TPP = 5,10,15,20-tetraphenyl-porphyrin; X = halide) in combination with bis(triphenylphosphine) iminium chloride (PPNC1) were used for the eopolymerization of cyelohexene oxide and CO2. The highest turnover frequency of 67.2 h^-1 was achieved after 13 h at 20℃, and the obtained poly(1,2-cyclohexylene carbonate) (PCHC) showed number average molecular weight (Mn) of 10 × 10^3. Though the obtained PCHC showed atactie structure, the m-centered tetrads content reached 58.1% at CO2 pressure of 1.0 MPa, and decreased to 51.9% at CO2 pressure of 6.0 MPa, indicating that it was inclined to form atactic polymer at high CO2 pressure. |
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Bibliography: | Carbon dioxide; Cobalt porphyrin; Cyclohexene oxide; Poly(1,2-cyclohexylene carbonate); Sstereochemistry;Copolymerization. Cobalt porphyrin complexes (TPPConIX) (TPP = 5,10,15,20-tetraphenyl-porphyrin; X = halide) in combination with bis(triphenylphosphine) iminium chloride (PPNC1) were used for the eopolymerization of cyelohexene oxide and CO2. The highest turnover frequency of 67.2 h^-1 was achieved after 13 h at 20℃, and the obtained poly(1,2-cyclohexylene carbonate) (PCHC) showed number average molecular weight (Mn) of 10 × 10^3. Though the obtained PCHC showed atactie structure, the m-centered tetrads content reached 58.1% at CO2 pressure of 1.0 MPa, and decreased to 51.9% at CO2 pressure of 6.0 MPa, indicating that it was inclined to form atactic polymer at high CO2 pressure. 11-2015/O6 |
ISSN: | 0256-7679 1439-6203 |
DOI: | 10.1007/s10118-011-1073-3 |