Efficient solvent-free alternating copolymerization of CO2 with 1, 2-epoxydodecane and terpolymerization with styrene oxide via heterogeneous catalysis
writer：Zhang, Y.-Y.; Wei, R.-J.; Zhang, X.-H.; Du, B.-Y.; Fan, Z.-Q.
keywords：1, 2-epoxydodecane, CO2, terpolymerization
source：期刊
specific source：Journal of Polymer Science Part A: Polymer Chemistry 2015, 53, 737-744.
Issue time：2015年
The alternating copolymerization of CO2 with the
terminated epoxides anchoring long alkyl groups is rarely reported because of
their low reactivity and polycarbonate selectivity. This work describes a
well-controlled solvent-free copolymerization of CO2 with 1,
2-epoxydodecane (EDD) with a long electron-donating alkyl group via the
catalysis of Zn-Co(III) double metal cyanide complex catalyst. The productivity
of the catalyst was up to 2406 g polymer/g Zn, i.e., EDD
conversion was 99.2%. The alternating degree of CO2-EDD copolymers
were more than 99% and had high number-average molecular weights (Mns) of >100 kg mol-1,
while only 1.0 wt% 4-decyl-1,3-dioxolan-2-one (DC) were detected. Moreover, by
introducing styrene oxide (SO) with electron-withdrawing phenyl group into
EDD-CO2 copolymerization system, a new random terpolymer with either
electron-withdrawing or electron-donating side groups was produced with single
glass transition temperatures (Tgs)
in a wide range from 3 to 56 oC, which might be potentially used as
biodegradable elastomers or plastics.