Perfluorocyclobutyl aryl ether-inserted vinyl silicone oil for crosslinking of fluorosilicone rubber

Vinyl silicone oil containing perfluorocyclobutyl aryl ether in the backbone (PFCB–VSO) was prepared by polycondensation of silane monomer containing perfluorocyclobutyl aryl ether (M4), dimethyldimethoxysilane, and methyl vinyl dimethoxysilane in the acetic acid system. Fluorosilicone rubber was designed by using PFCB-VSO as a non-telechelic crosslinker. The effects of PFCB-VSO on the mechanical properties, thermal properties, and hydrophobic properties of fluorosilicone rubber were studied. The cross-link network of fluorosilicone rubber was investigated. The cross-link point was concentrated by the introduction of PFCB-VSO, which was demonstrated by cross-link density. The mechanical properties were enhanced by the growth of the non-telechelic cross-link network. The tensile strength was 10.35 MPa, the tear strength was 21.78 kN/m, and the elongation at break was 735%. The thermal stabilities and the hydrophobic properties of fluorosilicone rubber were increased by PFCB-VSO.