Abstract
Simultaneous radical polymerization of vinylmonomers was carried out to improve wet skid resistance (Wet SR) of polyether- and polyester-based polyurethane. The amount of the monomers used was 10-15wt% in order to keep the rubberlike elasticity of polyurethane. Wet SR was enhanced by all the monomers employed, but it was enhanced without decreace of tensile properties only by nonpolar monomer such as divinylbenzene. They were decreased by polar monomers. Further, Wet SR of polyurethane was, inspite of its high modulus, found to have the same correlation with the loss tangent and modulus as presented for rubber for automobile tire by Yamamoto.
