Effects of EG and PEG with Different Molecular Weight on Property of Polyurethane Porous Membrane

In this paper,EG and PEG with different molecular weight were used as pore-foaming agent of polyurethane porous membrane.The influences of the dosage of EG and PEG with different molecular weight on micro-porous membrane structure of polyurethane were investigated through characterization and analysis of the SEM,moisture permeability,contact angle and tensile property of polyurethane porous membranes.The results showed that,when EG content was 50%,the moisture permeability reached 2 929g/(m2·d);the breaking strength and elongation at break were 5.77MPa and 451.3%respectively. This indicates polyurethane porous membrane gained has high moisture permeability,porosity and stretchability.