Copolymerizations of carbon dioxide and epoxides in the presence of rare earth coordinate catalyst

Abstract

Carbon dioxide (CO 2 ) as a direct material was copolymerized with epoxides to synthesize new aliphatic polycarbonates, and the copolymerization was catalyzed by the coordinate catalyst composed of rare earth yttrium phosphonate and triisobutylaluminum [Y(P 204 ) 3 -A1(i-Bu) 3 ]. The epoxides used in this research included epichlorohydrin (ECH) and some new glycidol ether (GE) monomers prepared by the reaction of ECH and phenol or alcohol, such as ␣-allyl glycidol ether, ␤-chloroethyl glycidol ether, benzene glycidol ether, m-tolyl glycidol ether, and benzyl glycidol ether. The copolymers were characterized by infrared (IR), 1 H nuclear magnetic resonance (-NMR), and dynamic mechanical analysis. The results show that Y(P 204 ) 3 -A1(i-Bu) 3 had better catalytic activity in the copolymerization of CO 2 with epoxide, and the copolymerization rate of aryl GE was distinctly higher than that of aliphatic GE. Dynamic mechanical analysis indicated the glass transition temperature T g of the copolymers GE-CO 2 were lower than that of ECH-CO 2 .

Addition of carbon dioxide to allyl glycidyl ether using ionic liquids catalysts

“…60 atm) for 44 h at 35 8C. Guo et al [13] also reported copolymer product of AGE-CO 2 using Y(P 204 ) 3 -Al(i-Bu) 3 catalyst under 30-40 atm CO 2 pressure for 24 h at 60 8C. Our previous work [14] also revealed the copolymerization of AGE and CO 2 using Co-Zn double metal cyanide catalyst at 9.6 atm for 36 h at 50 8C.…”

“…It is interesting to note that previous works reported mainly the formation of polycarbonate in the reaction of AGE with carbon dioxide [12][13][14]. Lukaszczyk et al [12] used a mixed catalyst system based on ZnEt 2 and pyrogallol for the copolymerization of AGE with CO 2 at high CO 2 pressure (ca.…”

“…The identification of the fivemembered cyclic carbonates was performed by FT-IR (ASI Model 1000, KBr), 1 H NMR and 13 …”

Effect of cocatalyst and carbon dioxide pressure on the synthesis of polycarbonate from phenyl glycidyl ether and carbon dioxide

“…The carbonate or ether unit content in the copolymerization product was calculated from 1 H-NMR spectra according to literature [22]. 13 C-NMR can also be useful in that each of the carbonates, be it cyclic or polymer, gives a unique signal. IR spectra of the polymers were obtained with a React IR (ASI Model 1000).…”

“…In our previous work [12], we also reported the synthesis of PMEC using immobilized quaternary ammonium salt catalysts. The copolymerization of PGE and CO 2 was also studied using Y(P 204 ) 3 -Al(i-Bu) 3 catalyst [13].…”