Poly(ethylene oxalate), product formed or molded therefrom and production process of poly(ethylene oxalate)

摘要

The invention provides poly(ethylene oxalate) containing recurring units represented by the following formula (1): in a proportion of at least 60 basal mol%, wherein (a) the solution viscosity ( eta inh) is at least 0.25 dl/g as measured at 30 DEG C and a polymer concentration of 0.40 g/dl in a 4:1 (by weight) mixed solvent of m-chlorophenol and 1,2,4-trichloro-benzene, (b) the melt viscosity ( eta <*>) is at least 30 Pa.s as measured at 190 DEG C and a shear rate of 1,000/sec, and (c) the density is at least 1.48 g/cm<3> as measured in an amorphous state, various products formed or molded from the poly(ethylene oxalate) and a production process of the poly(ethylene oxalate). The polymer is high-molecular weight and excellent in melt processability, heat resistance, crystalline properties, mechanical properties and the like, and has good degradability in soil.