Abstract: PUF based on PEG/PCL mixed soft segments was prepared in one-step. The effect of the ratio and the molecular weight of PEG and PCL on both static and dynamic mechanical behavior was investigated. For both PEGs with molecular weight of 400 and 1000, the tensile strength, elongation at break, and constant strain stress increased with increasing content of PCL. Higher molecular weight of PEG favored the elongation at break, but did not favor the tensile strength and constant strain stress.

Key words: poly(ethylene glycol), polycaprolactore, polyurethane foam, mechanical property