Some methods have been developed to convert the abundant

cheap CO2 resources to polymer products

in order to receive a degradable polymer by using CO2 as the raw material.A new aliphatic polycarbonate (PBCL) was synthesized by terpolymerization of carbon dioxide

1

2-butylene oxide(BO) and ε-caprolactone(CL).The terpolymer structure was characterized by FTIR

1H-NMR

13C-NMR

DSC and WAXD measurements.The influences of various reaction conditions such as the molar ratio of the monomers and the reaction time on the polymerization progress were investigated.The terpolymers were amorphous

the glass transition temperature (Tg) of the terpolymers were above 40℃

which were higher than those of poly(butylene carbonate) (PBC) and poly(ε-caprolactone)(PCL).The biodegradation behavior of these copolymers was investigated in a pH 7.4 phosphate buffer solution at 37℃.The results showed that ε-Caprolactone was inserted into the backbone of poly［(butylene oxide)-(carbon dioxide)］ successfully.ε-caprolactone offered an ester structure unit that gave the terpolymers remarkable degradability enhanced with increasing CL content in the terpolymers

the weight loss of PBCL55 was 37.68% after 8 weeks in buffer solution immersion test.