Structure and properties of polyurethane elastomer cured in graded temperature field

Polyurethane elastomer with graded structure was prepared via changing traditional curing processing. Curing reaction of polyurethane was performed in graded temperature field.The sample prepared was characterized using FTIR, WAXD, tensile testing and other methods. The results show that the degree of microphase separation in the sample decreases with the decrease of the curing temperature. The Young's modulus and tensile strength also exhibit the same changing trend. In the contrast, transparency increases with the decreasing temperature. According to the study, the graded properties of polyurethane prepared are related to microdomains structure in the material, changing with the curing temperature.