| 摘要 |
PROBLEM TO BE SOLVED: To provide a natural rubber exerting various functions of a graft polymer while retaining excellent properties inherent in a natural rubber (e.g. properties as a damping material). SOLUTION: The nanomatrix-dispersed natural rubber comprises a grafted natural rubber wherein vinyl monomers are grafted onto the surface of deproteinized natural rubber particles. The nanomatrix-dispersed natural rubber is produced by deproteinizing a natural rubber latex, introducing radical active points onto the surface of rubber particles with a water-soluble radical initiator, adding a monomer to carry out graft copolymerization on the surface of the natural rubber particles, making the obtained latex into a film or a bulk form and subjecting it to a heat-treatment at a temperature ranging from (Tg)-20°C to (Tg)+30°C, provided that (Tg) is the glass transition temperature of a polymer forming a graft chain. In the nanomatrix-dispersed natural rubber, the natural rubber particles are connected to each other and dispersed layeredly in a matrix 1-100 nm thick formed by the graft chain. COPYRIGHT: (C)2008,JPO&INPIT |
