REINFORCEMENT OF SILOXANE ELASTOMERS BY SILICA - INTERACTIONS BETWEEN AN OLIGOMER OF POLY(DIMETHYLSILOXANE) AND A FUMED SILICA

The study of the adsorption of an organosiloxane onto a fumed silica was undertaken in order to improve our knowledge of the reinforcement of silicon rubbers by silica. IR and gas‐phase chromatography techniques were used to characterize the adsorption of octamethyltetracyclosiloxane. At room temperature, the occurrence of hydrogen bonding between the solute and the adsorbent was shown. The amount of material adsorbed according to this mechanism was shown to be strongly dependent on temperature. The heats of adsorption at various covering ratios were calculated from the isotherms measured at temperatures close to 150°C. Copyright © 1979 John Wiley & Sons, Inc.