writer：Ming Luo, Xing-Hong Zhang,* Bin-Yang Du, Qi Wang, and Zhi-Qiang Fan
keywords：Carbonyl Sulfide，Propylene Oxide，Regioselective
source：期刊
specific source：Macromolecules 2013, 46, 5899-5904
Issue time：2013年

We report the first example of a regioregular and fully alternating poly (propylene monothiocarbonate) (PPMTC) from the well-controlled copolymerization of two asymmetric monomers, carbonyl sulfide and racemic propylene oxide, using (Salen)CrCl in conjunction
with bis(triphenylphosphoranylidene)ammonium chloride. The maximum turnover of frequency of this catalyst system was 332 h^-1 at 25 °C. The contents of monothiocarbonate and tail-to-head linkages of PPMTC were up to 100% (based on ¹H NMR spectra) and 99.0% (based on ¹³CNMR spectra), respectively. PPMTC samples have number-average molecular weight (M_n) up to 25.3 kg/mol with polydispersity index of 1.41. The very low decomposition temperature of 137 °C and high refractive index of 1.63 of PPMTC make it a potential scarifying optical adhesive.