| 초록 |
Aqueous dispersion of polyurethane(pu) ionomer, based on poly(butylene adipate) as soft segment, isophorone diisocyanate as diisocyanate, 1,4-butanediol as chain extender, dimethylol propionic acid as potential ionic center, triethylene tetramine as cross linker, and triethyl amine as neutralizer, were reinforced with graphene to give waterborne PU/graphene nanocomposites. The reinforcing effects of graphene were examined in terms of mechanical, dynamic mechanical and thermal properties together with electrical conductivity of the dispersion cast films. With the addition of 3phr graphene to PU, the conductivity were increased up to 10-4S/cm and also tensile modulus and strengh increased. The dispersion of graphene were studied by using transmission electron microscopy. |
