Synthesis of polyhydroxyurethanes by ring-opening polyaddition of Bi-functional cyclic carbonates with diamines and the film properties

摘要

Various kinds of polyhydroxyurethanes were synthesized by polyaddition of bis (cyclic carbonate) s and diamine to study the film properties. The tensile strength and elongation percentage of the polyhydroxyurethane films were varied with drying conditions probably due to absorbed water serving as a plasticizer. The water absorption percentages and thermal decomposition temperatures of the polyhydroxyurethane films were＞30％and 32～88℃ higher than those of commercial polyurethanes, respectively.