濃厚ポリマーブラシの層構造と摩耗進展

膜厚と粘弾性の同時計測

抄録

In this study, a homemade apparatus conducting time-resolved simultaneous measurements of the film thickness and viscoelasticity at the contact interface using optical interference and contact dynamics was developed. Two types of tests, the indentation and friction tests, were alternately conducted on a substrate coated with CPB and a steel ball. From the indentation tests, the presence of dilute, middle, and concentrated layers was quantitatively confirmed by measuring the film thickness about the change in viscoelasticity. From the friction tests, the wear of the CPB was detected from a decrease in the film thickness of the CPB. The thickness of each layer decreased at a constant value with sliding, indicating that the dilute layer was continuously formed due to sliding. Therefore, it is concluded that wear occurs randomly at the friction interface, resulting in the formation of a layer of low density and low stiffness on the surface.