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Crystalline and Elastomeric Poly(monothiocarbonate)s Prepared from Copolymerization of COS and Achiral Epoxide
journal contribution
posted on 2016-12-22, 18:37 authored by Wei-Min Ren, Tian-Jun Yue, Ming-Ran Li, Zhao-Qian Wan, Xiao-Bing LuThe semicrystalline poly(monothiocarbonate)s
were prepared by the copolymerization of carbonyl sulfide (COS) and
ethylene oxide, an achiral epoxide, using a bifunctional chromium(III)
complex as catalyst. The resultant copolymer, possessing perfectly
alternating structure, high molecular weight, and narrow polydispersity,
has a melting temperature of 128.2 °C, with a melting enthalpy
up to 75.44 J/g. Moreover, an ABA triblock copolymer containing the
“hard” semicrystalline poly(ethylene monothiocarbonate)
(A) and the “soft” amorphous poly(propylene monothiocarbonate)
(B) is synthesized by stepwise addition of epoxides. The tensile testing
demonstrates the triblock copolymer may have the potential as a thermoplastic
elastomer.