Non-Fouling Materials for Submerged Sensors.
Abstract
Silicones are effective as non-toxic fouling release marine coatings, but inorganic fillers are usually used to improve their strength. The objectives of this program was to develop a means of improving the strength of silicones that maintains their optical clarity for sensor applications. Hydrosilylation of hydride-terminated polydimethylsiloxane with polybutadiene in dilute solution yielded polysiloxane side-loops. Crosslinking took place on removal of solvent. When the ratio of silane to olefin in the hydrosilylation mixture was increased, the inherent viscosity of the solutions decreased drastically. The results are explained on the basis of diminishing availability of olefin sites as the reaction proceeds. When one end of a difunctional silane attaches to an olefin site and no other olefin sites are available nearby, molecular motion eventually brings a remote olefin site in the molecule into proximity. Hydrosilylation then results in permanent ring folding.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 28, 1999
- Accession Number
- ADA359408
Entities
People
- Kurt Baum