綱板とポリプロピレンの接着における分子量の効果

概要

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This study is concerned with the peel strength of laminated steel plates constituted of two steel plates and a plastic sheet. Sufficient bonding between steel plate and polypropylene is required for application of this material. In this paper, the effect of molecular weight of polypropylene on a adhesion was mainly investigated on the laminated steel plate. Two steel plates were adhered with a polypropylene sheet by using a mixed adhesive which composed of a silane coupling agent and peroxide, and adhesion strength was determined by T-peel test. The fracture surface created by peeling wasobserved by scanning electron mictoscopy (SEM), and its elemental composithion was determined by electron spectroscopy for chemical analysis (ESCA). The extent of deformation of peeled surface in the polypropylene side increased with peel strength. It was concluded by ESCA analysis that failure occured within the oxidized polypropylene layer, namely, by cohesive failure. T-peel strength became large with increasing molecular weight of polypropylene. This result suggests that the peel strength depends on the force of drawing out of polimer chains.
社団法人日本材料学会の論文
1992-02-15