title: Influence of additives on the water uptake of hydrosilanized silicone rubbers.
abstract: Water uptake characteristics of a silicone polymer containing additives of varying solubility have been investigated. A hydrophobic silica, a sparingly soluble agent and a soluble catalyst were added to a stoichiometrically balanced hydrosilanized silicone polymer (the inherent absorption of which was 0.09 wt%). The diffusion coefficients for desorption of all materials were of the order 10(-6) cm2s-1, whereas the diffusion coefficients for absorption showed a decrease with increasing hydrophilicity and solubility of the additive. The greater the solubility of the additive, the more prolonged the uptake and the greater the deviation from classic diffusion theory.
authors.affiliation: Department of Biomaterials in Relation to Dentistry, St. Bartholomew's, London, UK.
authors.forename: P D
authors.initials: PD
authors.lastname: Riggs
authors.forename: S
authors.initials: S
authors.lastname: Parker
authors.forename: M
authors.initials: M
authors.lastname: Braden
authors.forename: S
authors.initials: S
authors.lastname: Kalachandra
mesh_terms: D000042:Absorption; D007202:Indicators and Reagents; D017671:Platinum Compounds; D012821:Silanes; D012822:Silicon Dioxide; D012826:Silicone Elastomers / Q000737:chemistry*; D013500:Surface Tension; D014867:Water
chemical_list: D007202:Indicators and Reagents; D017671:Platinum Compounds; D012821:Silanes; D012826:Silicone Elastomers; D014867:Water; C082343:silanol; C002999:chloroplatinic acid; D012822:Silicon Dioxide