Hybrid organic/inorganic copolymers with strongly hydrogen-bond acidic properties for acoustic wave and optical sensors

Journal Article · Thu May 01 04:00:00 EDT 1997 · Chemistry of Materials

DOI:https://doi.org/10.1021/cm960590t· OSTI ID:569170

Grate, J W; Kaganove, S N; Patrash, S J ^[1]

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1. Pacific Northwest National Lab., Richland, WA (United States); and others

Hybrid organic/inorganic polymers have been prepared incorporating fluoroalkyl-substituted bisphenol groups linked using oligosiloxane spacers. These hydrogen-bond acidic materials have glass-to-rubber transition temperatures below room temperature and are excellent sorbents for basic vapors. The physical properties such as viscosity and refractive index can be tuned by varying the length of the oligosiloxane spacers and the molecular weight. In addition, the materials are easily cross-linked to yield solid elastomers. The potential use of these materials for chemical sensing has been demonstrated by applying them to surface acoustic wave devices as thin films and detecting the hydrogen-bond basic vapor dimethyl methylphosphonate with high sensitivity. It has also been demonstrated that one of these materials with suitable viscosity and refractive index can be used to clad silica optical fibers; the cladding was applied to freshly drawn fiber using a fiber drawing tower. These fibers have potential as evanescent wave optical fiber sensors. 38 refs., 2 figs.

• DOE Contract Number: AC06-76RL01830
• OSTI ID: 569170
• Journal Information: Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 5 Vol. 9; ISSN 0897-4756; ISSN CMATEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
ACOUSTIC MEASUREMENTS
CLADDING
COPOLYMERS
CROSS-LINKING
DETECTION
ELASTOMERS
HYBRIDIZATION
INORGANIC POLYMERS
ION ACOUSTIC WAVES
MOLECULAR WEIGHT
NMR SPECTRA
OPTICAL EQUIPMENT
OPTICAL FIBERS
OPTICAL PROPERTIES
PH VALUE
PHYSICAL PROPERTIES
REFRACTIVE INDEX
SENSITIVITY
SILICA
SPACERS
SYNTHESIS
THIN FILMS
VAPORS
VISCOSITY