機械加硫ゴムの物性と構造

概要

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When vulcanized rubber is strained by external force at lower temperature, e. g. lower than its glass transition temperature, it is considered that there occurs in the network of polymer chains. When natural rubber has external force to 200% of its original bulk at -70℃, and is left in nitrogen at room temperature for about four hours, its cross-linking density increases about 17% as high. The relation between the cross-linking density and the rate of deformation due to the strain shows the Maxwellian type. Experiments have revealed the fact, on the other hand, that when vulcanized is impregnated with radical acceptor its cross-linking density gets remarkably reduced in the rate of increment. It is conceivable, all things considered, that some mechanical reaction has taken place on the degraded rubber radicals to recombine.
社団法人日本材料学会の論文
1971-05-15