scholarly journals Mechanistic Insights into the Carbon Dioxide/Cyclohexene Oxide Copolymerization Reaction: Is One Metal Center Enough?

ChemSusChem ◽  
2017 ◽  
Vol 10 (6) ◽  
pp. 1233-1240 ◽  
Author(s):  
Joan González-Fabra ◽  
Fernando Castro-Gómez ◽  
Arjan W. Kleij ◽  
Carles Bo
Keyword(s):  
Carbon Dioxide ◽  
Metal Center ◽  
Cyclohexene Oxide ◽  
Copolymerization Reaction

Alternating Copolymerization of Carbon Dioxide with Cyclohexene Oxide Catalyzed by a Novel Catalyst

2012 ◽  
Vol 549 ◽  
pp. 445-448
Author(s):  
Li Dan Fan ◽  
Gang Qin ◽  
Xin Xin Cao ◽  
Shao Kui Cao
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Activity ◽  
Reaction Time ◽  
Zinc Complex ◽  
Cyclohexene Oxide ◽  
Novel Catalyst ◽  
Alternating Copolymerization

A novel catalyst for the copolymerization of CO2 and cyclohexene oxide(CHO) was prepared by using BTE and ZnCl2. The zinc complex showed catalytic activity for the copolymerization. The obtained copolymer was characterized by IR and NMR. Effect of reaction time on copolymerization was investigated.

scholarly journals Study on Thermal Decomposition Behaviors of Terpolymers of Carbon Dioxide, Propylene Oxide, and Cyclohexene Oxide

2018 ◽  
Vol 19 (12) ◽  
pp. 3723 ◽  
Author(s):  
Shaoyun Chen ◽  
Min Xiao ◽  
Luyi Sun ◽  
Yuezhong Meng
Keyword(s):  
Carbon Dioxide ◽  
Thermal Stability ◽  
Thermal Decomposition ◽  
Thermogravimetric Analysis ◽  
Propylene Carbonate ◽  
Cyclohexene Oxide ◽  
Block Polymers ◽  
Rate Method ◽  
Poly Propylene ◽  
Thermal Stability Of

The terpolymerization of carbon dioxide (CO2), propylene oxide (PO), and cyclohexene oxide (CHO) were performed by both random polymerization and block polymerization to synthesize the random poly (propylene cyclohexene carbonate) (PPCHC), di-block polymers of poly (propylene carbonate–cyclohexyl carbonate) (PPC-PCHC), and tri-block polymers of poly (cyclohexyl carbonate–propylene carbonate–cyclohexyl carbonate) (PCHC-PPC-PCHC). The kinetics of the thermal degradation of the terpolymers was investigated by the multiple heating rate method (Kissinger-Akahira-Sunose (KAS) method), the single heating rate method (Coats-Redfern method), and the Isoconversional kinetic analysis method proposed by Vyazovkin with the data from thermogravimetric analysis under dynamic conditions. The values of ln k vs. T−1 for the thermal decomposition of four polymers demonstrate the thermal stability of PPC and PPC-PCHC are poorer than PPCHC and PCHC-PPC-PCHC. In addition, for PPCHC and PCHC-PPC-PCHC, there is an intersection between the two rate constant lines, which means that, for thermal stability of PPCHC, it is more stable than PCHC-PPC-PCHC at the temperature less than 309 °C and less stable when the decomposed temperature is more than 309 °C. Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and thermogravimetric analysis/infrared spectrometry (TG/FTIR) techniques were applied to investigate the thermal degradation behavior of the polymers. The results showed that unzipping was the main degradation mechanism of all polymers so the final pyrolysates were cyclic propylene carbonate and cyclic cyclohexene carbonate. For the block copolymers, the main chain scission reaction first occurs at PC-PC linkages initiating an unzipping reaction of PPC chain and then, at CHC–CHC linkages, initiating an unzipping reaction of the PCHC chain. That is why the T−5% of di-block and tri-block polymers were not much higher than that of PPC while two maximum decomposition temperatures were observed for both the block copolymer and the second one were much higher than that of PPC. For PPCHC, the random arranged bulky cyclohexane groups in the polymer chain can effectively suppress the backbiting process and retard the unzipping reaction. Thus, it exhibited much higher T−5% than that of PPC and block copolymers.

Kinetics of Ternary Copolymerization of Carbon Dioxide with Propylene Oxide, Butene Oxide, and Cyclohexene Oxide

2019 ◽  
Vol 61 (4) ◽  
pp. 395-403 ◽  
Author(s):  
O. M. Chukanova ◽  
K. O. Korenkov ◽  
E. O. Perepelitsina ◽  
N. O. Garifullin ◽  
I. V. Sedov
Keyword(s):  
Carbon Dioxide ◽  
Propylene Oxide ◽  
Cyclohexene Oxide ◽  
Kinetics Of

Highly Active Dizinc Catalyst for the Copolymerization of Carbon Dioxide and Cyclohexene Oxide at One Atmosphere Pressure

2009 ◽  
Vol 48 (5) ◽  
pp. 931-933 ◽  
Author(s):  
Michael R. Kember ◽  
Paul D. Knight ◽  
Palarp T. R. Reung ◽  
Charlotte K. Williams
Keyword(s):  
Carbon Dioxide ◽  
Cyclohexene Oxide ◽  
Atmosphere Pressure ◽  
Highly Active

Synthesis, structures, and thermal properties of terpolymers of propylene oxide, carbon dioxide, and cyclohexene oxide

2019 ◽  
Vol 68 (11) ◽  
pp. 2119-2125
Author(s):  
Z. N. Nysenko ◽  
E. E. Said-Galiev ◽  
M. I. Buzin ◽  
G. G. Nikiforova ◽  
M. M. Il’in ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Thermal Properties ◽  
Propylene Oxide ◽  
Cyclohexene Oxide

Cationic Co–Salphen Complexes Bisligated by DMAP as Catalysts for the Copolymerization of Cyclohexene Oxide with Phthalic Anhydride or Carbon Dioxide

2017 ◽  
Vol 50 (20) ◽  
pp. 7895-7900 ◽  
Author(s):  
Masahiro Hatazawa ◽  
Rei Takahashi ◽  
Jingyuan Deng ◽  
Hirohiko Houjou ◽  
Kyoko Nozaki
Keyword(s):  
Carbon Dioxide ◽  
Phthalic Anhydride ◽  
Cyclohexene Oxide
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