Structure and properties of heat-resistant high-strength organosilicon press material with short fibers

The paper considers the influence of geometric parameters of the structure of chopped silica fiber in a heat-resistant polymer composite press material based on an organosilicon matrix, which is condensation product of silanols obtained by hydrolysis from phenylsilanetriol and methylsilanetriol. It has been shown that as the length of the short fiber increases, the strength, hardness, and elastic modulus increase, but at the same time, the technological efficiency of processing decreases and the porosity of the finished materials increases. The optimal length of silica fiber (about 25 mm) in organosilicon composite material has been established to obtain balanced technological, operational characteristics and processing by pressing.