Study on high‐temperature composite properties of fluorosilicone rubber with nano‐Sb2O3

Abstract

AbstractThis article studied the influence of nano‐Sb2O3 on the high‐temperature composite performance of fluorosilicone rubber (FVMQ). FVMQ with 4% mass of nano‐Sb2O3 content was prepared by mechanical blending method. The friction properties of FVMQ and Sb2O3/FVMQ composites at different temperatures were analyzed by means of three‐dimensional profilometer and scanning electron microscopy. The results showed that nano‐Sb2O3 can enhance the matrix strength of FVMQ, and this effect was obvious at high temperature. The elongation of Sb2O3/FVMQ composites was increased by 10.7% at 25°C. The tear strength of Sb2O3/FVMQ composites was increased by 53.1%. While the friction coefficient and the wear amount, respectively, were decreased by 20 and 48.53% at 200°C. Sb2O3/FVMQ composite showed excellent anti‐wear, antifriction, anti‐tear, and other characteristics in the high‐temperature test. The enhancement of the cross‐linking density of matrix caused by adding Sb2O3 into FVMQ can lead to the softening of rubber, and the type of wear changed from abrasive wear to adhesive wear. Thus, the composite showed good wear resistance.