グラファイト充填・縮合多環多核芳香族樹脂複合材のトライボロジー特性

概要

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Thermosetting resin named COPNA were prepared from Fluorene (fused polycyclic hydrocarbon) and 1,4-benzendimethanol with p-toluenesulfonic acid as a catalyst. The cured resin at 210℃ and the carbonized product at about 500℃ were analysed by IR, TGA, GC-MS to study the polymerization process and initial carbonization process. Two series of flat testing specimens were prepared from Fluorene-based COPNA resin (FC), above-mentioned, and commercial pitch-based COPNA resin (SK) composites filled with 0-40 mass% graphite. Their lubricating properties such as the dependence of friction coefficient on load, sliding speed and temperature, were evaluated, using a cylinder/plate type tribometer. Main results are as follow. (1) The load carrying capacity increases and the friction coefficient (μ) decreases with graphite filled content: max.load > 4900 N and min.μ=0.04 for FC composite; and max..load=3920N and min.μ=0.03 for SK composite. (2) Both FC and SK composites give higher limitting PV values,10-20 MPa・m/s, than others reported. (3) The friction of the FC composite increases abruptly at about 300℃ during increasing of temperature, but that of the carbonized product holds with a lower value, μ<0.1, up to 550℃. (4) Some very thin films with modified graphite on the rubbing surfaces are observed in good lubrication conditions; the formation and lubrication mechanisms are discussed.
東海大学の論文
1998-03-30