Alternating copolymerization of carbonyl sulfide and Cyclohexene Oxide catalyzed by zinc-cobalt double metal cyanide complex

作者：Luo, Ming; Zhang, Xing-Hong^*; Du, Bin-Yang; Wang, Qi; Fan, Zhi-Qiang

来源：Polymer, 2014, 55(16): 3688-3695.

DOI：10.1016/j.polymer.2014.05.065

• Carbonyl sulfide
• Cyclohexene oxide
• Copolymerization

This paper describes the first example of alternating copolymerization of carbonyl sulfide (COS) with cyclohexene oxide (CHO) via heterogenous catalysis of a nano-lamellar zinc-cobalt(III) double metal cyanide complex (Zn-Co(III) DMCC), providing an efficient method for converting COS to poly(-cyclohexene monothiocarbonate) (PCHMTC) with an alternating degree up to 93%. The number-average molecular weight (M-n) of PCHMTC was 6.5-25.0 kg/mol with polydispersities (PDIs) of 1.6-2.1. The productivity of the catalyst was up to 970 g polymer/g catalyst (5.0 h). The oxygen-sulfur exchange reaction (O/S ER) caused by Zn-Co(III) DMCC was largely suppressed when the reaction was performed at 100-110 degrees C in the presence of THF or CH2Cl2, and thus the selectivity of the monothiocarbonate over carbonate linkages was up to 98%. The mechanisms of the copolymerization and O/S ER were proposed based on the ESI-MS, GC-MS and FT-IR spectra. The obtained PCHMTC is highly transparent and exhibits good solubility in various organic solvents, high T-g of 112 degrees C, initial decomposition temperature of 214 degrees C and high refractive index of 1.705.

• 出版日期2014-8-5
• 单位浙江大学