Surface modification method, surface modification elastic body, syringes gaskets, syringes and tires

Surface modification method, surface modification of the polymer brush formed on the surface of the elastic body giving the sliding property to the surface of the elastic body such as a vulcanized rubber or a thermoplastic elastomer without using a resin having an expensive self-lubricating quality elastic body to provide a syringe gasket and the syringe were formed by surface modification elastic body. Surface modification methods are directed to thermoplastic elastomers or vulcanized surface of the rubber. The method, the surface of the object to be modified, such as rubber, to the water contact angle of 8 degrees to with respect to the value of the water contact angle when untreated to produce a hydroxyl group so as to reduce 50 °, 2 a hydroxyl group It reacted with grade or tertiary organic halogen compound to form a polymerization initiation point. Next it is that the polymer brushes are grown on the surface of the object to be modified by monomers by radical polymerization by starting from the polymerization initiation point.