繊維強化高分子複合体における力学分散

概要

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In order to characterize the mechanical dispersion in fiber-reinforced polymer composite, the dynamic viscoelastic properties were measured for the polymer composite reinforced with satin glass cloth. The symmetrical angle between the length direction of sample and each fiber axis of warp and woof was varied to be±67.5°(ECN67.5), ±45 °.(ECN45) and ±22.5°(ECN22.5). The composite reinforced with the cloth in which the fiber axis of warp coincided with the longitudinal direction of sample (ECN0), that reinforced with uniaxially aligned glass roving to the longitudinal direction of sample (ERN0) and that reinforced with glass chopped strand mat (EWN) were also used as samples. Although the primary transition on E″ and tanδ vs. temperature curve is merely observed in ECN67.5 and ECN45, a sub-transition appears at a temperature above the primary transition in ECN22.5, ECN0, ERN0 and EWN. The appearance of the sub-transition is characteristic in fiber-reinforced polymer composite. The present results can be explained by the mechanism proposed by Lipatov el al. starting that the separation of the sub and primary transition occurs if the boundary layers formed on the surface of reinforcement and the bulk polymer phase are coupled parallel with respect to the direction of deformation.
日本複合材料学会の論文