Polyester polyol synthesis by alternating copolymerization of propylene oxide with cyclic acid anhydrides by using double metal cyanide catalyst

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• 作者：Hyun Suk Suh ; Ju Young Ha ; Ji Hwan Yoon ; Chang-Sik Ha ; Hongsuk Suh ; Il Kim
• 关键词：Catalysis ; Copolymerizations ; Cyclic anhydrides ; Double metal cyanide ; Propylene oxide
• 刊名：Reactive and Functional Polymers
• 出版年：2010
• 出版时间：May 2010
• 年：2010
• 卷：70
• 期：5
• 页码：288-293
• 全文大小：683 K

文摘

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 Zn_2.3Cl_1.0[Co(CN)₆]_1.02.0^tBuOH1.0H₂O 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 (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.