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Poly(trimethylene monothiocarbonate) from the Alternating Copolymerization of COS and Oxetane: A Semicrystalline Copolymer

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journal contribution
posted on 21.11.2016, 18:03 by Hai-Lin Wu, Jia-Liang Yang, Ming Luo, Rui-Yang Wang, Jun-Ting Xu, Bin-Yang Du, Xing-Hong Zhang, Donald J. Darensbourg
A semicrystalline poly­(trimethylene monothiocarbonate) (PTMMTC) has been synthesized via the selective and alternating copolymerization of carbonyl sulfide and oxetane. This reaction was catalyzed by (salen)­CrCl accompanied by organic bases over a wide range of temperatures from 40 to 130 °C. PTMMTC is shown to exhibit similar crystallization behavior to high-density polyethylene (HDPE), i.e., being spherulite and possessing melting temperatures (Tm) up to 127.5 °C and a degree of crystallinity (Xc) of up to 71%. Moreover, PTMMTC has a wide processing temperature window of ca. 100 °C.

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