Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5210800 | Reactive and Functional Polymers | 2010 | 6 Pages |
Abstract
Ring-opening copolymerizations of propylene oxide (PO) with cyclic acid anhydrides, succinic anhydride (SA), maleic anhydride (MA) and phthalic anhydride (PA) were carried out in the presence of a double metal cyanide (DMC) catalyst of molecular formula Zn2.3Cl1.0[Co(CN)6]1.0â
2.0tBuOHâ
1.0H2O as a means of developing functional polyols bearing ester backbones. Uniform alternating copolymers are produced when [PO]/[anhydride] in the copolymer approaches unity. All resulting copolymers have moderate molecular weights (Mn = 2300-10,600) and a narrow polydispersity index (1.02-1.49). The apparent reactivity ratio of PO is 0.34, 0.28, and 0.26 for PO/SA, PO/MA, and PO/PA copolymerizations, respectively, assuming that the reactivity ratio of the anhydrides is zero. The DMC-catalyzed PO copolymerizations with anhydrides are an efficient way to produce polyester polyols, expanding the versatility of conventional polyols.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Hyun Suk Suh, Ju Young Ha, Ji Hwan Yoon, Chang-Sik Ha, Hongsuk Suh, Il Kim,