Selective copolymerization of carbon dioxide with propylene oxide catalyzed by a nanolamellar double metal cyanide complex catalyst at low polymerization temperatures

Regioselective and Alternating Copolymerization of Carbonyl Sulfide with Racemic Propylene Oxide

“…These phenomena were typical for the copolymerization with predominant chain-transfer reaction, which was similar to CO 2 −PO copolymerization. 10,13 We also observed that O/S ER took place when the H 2 O/PO molar ratio ≥1/50 (entries 3−5 in Table 2). The FT-IR ( Figure S14 in the Supporting Information) and Raman ( Figure S15 in the Supporting Information) spectra of the copolymer from entry 5 of Table 2 showed that it contained end −OH (3540 cm −1 in FT-IR) and −SH groups (2665 cm −1 in Raman spectrum).…”

“…1 H NMR (CDCl 3 ) δ 5.19−5.13 (m, 1H), 3.16−3.00 (m, 2H), 1.37 (d, J = 6.3 Hz, 3H). 13 Table 1. Table 1).…”

Zn–Cr double metal cyanide catalysts synthesized by ball milling for the copolymerization of CO2/propylene oxide, phthalic anhydride/propylene oxide, and CO2/propylene oxide/phthalic anhydride

“…2, which presented a blocky structure with small, uniformly sized, and highly coagulated and nonuniform particles. The one-dimensional nanostructure ensured a better dispersion of the monomers and better exposure of active sites to the reactants, and thus yielded high catalytic activity [16]. It indicated that reactants were fully reacted and form small particles on nanoscale during the process of ball milling, moreover, it also demonstrated that grinding technique indeed allowed for a more controlled and fine particle size of the DMC material.…”

Recent advances in carbon dioxide based copolymers

“…Typical heterogeneous catalysts include ZnEt 2 -active hydrogen containing compound systems [11][12][13], zinc dicarboxylates [14][15][16][17][18], double metal cyanide complexes [19][20][21][22][23][24][25][26], and rare-earth metal coordination ternary catalysts [27][28][29][30][31], though the chemical structures or crystal structures of heterogeneous catalysts are not clear, they are convenient in synthesis and handling, showing more potentiality for industrial purpose.…”

“…When DMC is used for copolymerization of CO 2 and PO, it cannot produce fully alternating PPC [25,26], but the ether linkages in PPC from DMC catalyst may find unique application for poly(carbonate-ether)diols. Therefore, our group prepared colorless oligo(carbonate-ether) diols in high efficiency from copolymerization of CO 2 and propylene oxide (PO) using Zn 3 [Co(CN) 6 ] 2 based DMC as catalyst and polypropylene glycols (PPGs) as chain transfer agent [85].…”