Method of evaluating the coefficient of friction of frost-resistant sealing rubbers

Abstract

The results of an experimental study of the effect of the normal pressure in the range of 0.1-0.3 MPa, a velocity of sliding of 1-100 mm/s, and a bulk temperature of 22 to -27°C on the coefficient of sliding friction of an elastomer-steel friction pair have been presented. Two types of elastomeric materials have been considered, i.e., frost resistant rubber based on synthetic propylene oxide rubber and this rubber filled with the antifriction additive of ultrafine polytetrafluoroethylene powder in an amount of 1 weight part per 100 weight parts. The results have shown the efficiency of filling rubbers with ultrafine polytetrafluoroet hylene; the coefficient of sliding friction at temperatures below -15°C decreases by more than two times.

Experimental Study of the Influence of Rubber Properties on Sliding Friction in Dry Contact

“…Meanwhile, due to cyclic deformations of the rubber by asperities of sandpaper in the process of sliding friction a second weak maximum of the coefficient of friction, is observed [3,4]. In fact, one of the authors of this work has shown [5] that, a second weak maximum at friction of rubber against smooth well-polished steel in the same testing conditions, was not observed. From the results (figure 2) it is evident that normal pressure has a strong influence on the coefficient of friction.…”

Влияние Размера Частиц И Концентрации Фторсодержащего Полимера На Свойства Морозостойких Резин На Основе Пропиленоксидного Каучука

“…А.Ю. Ишлинского РАН (г. Москва) на трибометре UMT-2 по методике, изложенной в работах [39,44], сопротивление резин абразивному износу также изучали на машине трения МИ-2 и приборе АР-40.…”

“…А.Ю. Ишлинского РАН (г. Москва) [39,44] для резины, содержащей 50 мас.ч. УПТФЭ, были детально исследованы триботехнические свойства разработанного материала при комнатной и отрицательной температурах.…”

Preparation and Improved Physical Characteristics of Propylene Oxide Rubber Composites

“…UPTFE (brand name: “Forum”) is a PTFE with a molecular weight that is relatively lower than that of ordinary PTFE [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. UPTFE has unique thermal and aggressive media resistance, chemical resistance, a low coefficient of friction, and can withstand temperatures of −169 °C to 270 °C [ 13 , 14 ].…”