Filler Reinforcementの展望 : 分散系のレオロジー : レオロジー特集号

概要

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This stiffening of elastomers by filler loading is both a surface and a volume effects. As expressed in a formula by Guth and Smallwood, volume effect means the increase of the strain energy, and is due to the stress disturbance in the matrix around filler particles. Therefore, a more general formula applicable also to reinforced hard polymers will be derived, provided that the volume dilation term is not omitted when the equation of equilibrium in terms of displacements is solved: The result of our analysis is presented in the text. The analysis of surface effect has been developed by many investigators. Among them, Furukawa and A.M. Bueche modified the stress equation of rubber elasticity based on the kinetic theory be introducing the term accounting for additional network chins resulting from the adhesion of polymer molecules on filler surfaces. Recently, a more precise equation was derived by Sato which included, besides a surface and a volume effects, a cavity effect due to incomplete wetting. There were many reports which suggested that the bond between rubber and active fillers, such as fine silica and carbon black, was so strong as to be considered chemical in nature. However, a variety of data suggesting the existence of weak bonds something thixotropic in nature were also presented.
社団法人日本材料学会の論文
1962-05-15