Journal
REACTIVE & FUNCTIONAL POLYMERS
Volume 70, Issue 5, Pages 288-293Publisher
ELSEVIER
DOI: 10.1016/j.reactfunctpolym.2010.02.001
Keywords
Catalysis; Copolymerizations; Cyclic anhydrides; Double metal cyanide; Propylene oxide
Funding
- World Class University Program [R32-2008-000-10174-0]
- MEST [R15-2006-022-01001-0]
- Brain Korea 21 Program [BK-21]
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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)](1.0)center dot 2.0'BuOH center dot 1.0H(2)O 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 (M-n = 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. (c) 2010 Elsevier Ltd. All rights reserved.
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