Effect of a hydroxyl terminated poly dimethyl siloxane,in combination with TESPT,on the mechanical and dynamic properties of silica filled rubber in addition to reducing ethanol emission in combination with TESPT

Abstract

This work is aimed to improve the dispersion of silica without compromise on the Mechanical and Dynamic properties, by the addition of Hydroxyl terminated poly dimethyl siloxane (PDMS-OH). PDMS-OH is expected to interact with silica through hydrogen bonding which is reversible, reduces filler–filler interaction and hence improve the silica dispersion. Dissociation of hydrogen bonds which is reversible, provides a way for significant energy dissipation during deformation by the external stress and then promotes the recovery after the stress is removed. This prevents the filler re-agglomeration after deformation which is not possible with only silica-TESPT bonds which are covalent and irreversible. This study also explores the possibilities of reducing the emission of volatile organic compound ethanol by partially replacing the TESPT coupling agent with PDMS-OH without sacrificing in Mechanical and Dynamic properties such as Rolling Resistance and wet Traction.