SBR純ゴム系,CaCO3複合系加硫物の体積弾性率緩和現象

概要

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In order to study for phenomena of bulk modulus relaxation of pure gum vulcanizate systems that had various crosslinking densities and CaCO3 filled vulcanizate systems that had weak interface activite we investigated the effect that provided the relaxation with interface structure from change of relaxation spectrum forms in repeated relaxation.Consequently we inferred the following; in case of pure rubber systems the form of relaxation spectrum had no effects on the crosslinking structures, but in case of CaCO3 filled vulcanizate systems the structures formed microscopic voides around the interface. And we confirmed that relaxation bulk modulus were presented by an approximato equation for repeated number N and were one by one astringent in relaxation bulk modulus of matrix rubber phase.KR(Vf, N)=ak+bk[1-{1-vc•exp(-k•N)}•Vf]Here ak, bk and k is constant, Vf is volume ratio of particules and vc is volume ratio of voids of a unit particles phases.
日本ゴム協会の論文