Study on high-temperature composite properties of fluorosilicone rubber withnano-Sb2O3

摘要

This article studied the influence of nano-Sb(2)O(3)on the high-temperature composite performance of fluorosilicone rubber (FVMQ). FVMQ with 4% mass of nano-Sb(2)O(3)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-Sb(2)O(3)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 degrees 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 degrees 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 Sb(2)O(3)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.