Copolymerization of carbon dioxide and propylene oxide catalyzed by two kinds of bifunctional salen‐cobalt(III) complexes bearing four quaternary ammonium salts

2019 ◽  
Vol 67 (1) ◽  
pp. 72-79
Author(s):  
Longchao Du ◽  
Chengze Wang ◽  
Weiju Zhu ◽  
Jie Zhang
Keyword(s):  
Carbon Dioxide ◽  
Propylene Oxide ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts

Conversion of Carbon Dioxide into Oxazolidinones Mediated by Quaternary Ammonium Salts and DBU

ChemCatChem ◽  
2017 ◽  
Vol 9 (24) ◽  
pp. 4451-4455 ◽  
Author(s):  
Min Lv ◽  
Peng Wang ◽  
Dan Yuan ◽  
Yingming Yao
Keyword(s):  
Carbon Dioxide ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts

Terpolymerizations of CO 2 , Propylene Oxide and DL‐Lactide Catalyzed by Zn‐Fe DMC Catalysts with Quaternary Ammonium Salts

2020 ◽  
Vol 5 (8) ◽  
pp. 2388-2394 ◽  
Author(s):  
Ningzhang Liu ◽  
Chuanhai Gu ◽  
Mengting Chen ◽  
Junan Zhang ◽  
Wen Yang ◽  
...  
Keyword(s):  
Propylene Oxide ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts

scholarly journals Copolymerization and terpolymerization of carbon dioxide/propylene oxide/phthalic anhydride using a (salen)Co(III) complex tethering four quaternary ammonium salts

2014 ◽  
Vol 10 ◽  
pp. 1787-1795 ◽  
Author(s):  
Jong Yeob Jeon ◽  
Seong Chan Eo ◽  
Jobi Kodiyan Varghese ◽  
Bun Yeoul Lee
Keyword(s):  
Molecular Weight ◽  
High Activity ◽  
Phthalic Anhydride ◽  
Propylene Oxide ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Alternating Copolymer ◽  
Highly Active ◽  
Full Conversion

The (salen)Co(III) complex 1 tethering four quaternary ammonium salts, which is a highly active catalyst in CO2/epoxide copolymerizations, shows high activity for propylene oxide/phthalic anhydride (PO/PA) copolymerizations and PO/CO2/PA terpolymerizations. In the PO/PA copolymerizations, full conversion of PA was achieved within 5 h, and strictly alternating copolymers of poly(1,2-propylene phthalate)s were afforded without any formation of ether linkages. In the PO/CO2/PA terpolymerizations, full conversion of PA was also achieved within 4 h. The resulting polymers were gradient poly(1,2-propylene carbonate-co-phthalate)s because of the drift in the PA concentration during the terpolymerization. Both polymerizations showed immortal polymerization character; therefore, the molecular weights were determined by the activity (g/mol-1) and the number of chain-growing sites per 1 [anions in 1 (5) + water (present as impurity) + ethanol (deliberately fed)], and the molecular weight distributions were narrow (M w/M n, 1.05–1.5). Because of the extremely high activity of 1, high-molecular-weight polymers were generated (M n up to 170,000 and 350,000 for the PO/PA copolymerization and PO/CO2/PA terpolymerization, respectively). The terpolymers bearing a substantial number of PA units (f PA, 0.23) showed a higher glass-transition temperature (48 °C) than the CO2/PO alternating copolymer (40 °C).

Fluorinated Quaternary Ammonium Salts as Dissolution Aids for Polar Polymers in Environmentally Benign Supercritical Carbon Dioxide

2009 ◽  
Vol 21 (14) ◽  
pp. 3125-3135 ◽  
Author(s):  
Manabu Tanaka ◽  
Abhinav Rastogi ◽  
Gregory N. Toepperwein ◽  
Robert A. Riggleman ◽  
Nelson M. Felix ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Environmentally Benign ◽  
Polar Polymers ◽  
Supercritical Carbon
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