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 (M-4), 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.

Automated summary

PFCB-VSO has significant effects on the mechanical properties, thermal properties, and hydrophobic properties of fluorosilicone rubber, enhancing the non-telechelic cross-link network to improve mechanical performance, and increasing thermal stability and hydrophobicity.