(29)Si solid state NMR studies of the effect of composition of amine and alkyl silane blends in tertiary amine-catalyzed anhydride-cured epoxy mixtures. Technical report
Silane coupling agent blends of gamma-aminopropyltriethoxysilane (APS) and butyltriethoxysilane (BTS) of varying composition were added to an epoxy matrix made of a benzyldimethylamine (BDMA)-catalyzed, nadic methyl anhydride. NMR was utilized in order to determine the effect of composition of the silane coupling agent blend on the mobility of the various portions of the siloxane network. It was found that hydrolysis caused an increase in the rigidity of the highly condensed structures, but decreased the rigidity of the silicon atoms bonded to only one or two oxygen atoms. This phase separation could possibly lead to stress concentration within the network structure. Increasing amine concentration caused only slight increases in rigidity. Although ETS gave consistently lower rigidity values than BTS, these values were not statistically significant.
- Research Organization:
- Case Western Reserve Univ., Cleveland, OH (United States). Dept. of Macromolecular Science
- OSTI ID:
- 5409733
- Report Number(s):
- AD-A-235841/4/XAB; CNN: N00014-88-R-0330
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603* -- Materials-- Properties
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKYL RADICALS
AMINES
ANHYDRIDES
ATOMS
CATALYSTS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
CURING
DECOMPOSITION
DISPERSIONS
ELEMENTS
EPOXIDES
EVEN-ODD NUCLEI
HYDRIDES
HYDROGEN COMPOUNDS
HYDROLYSIS
ISOTOPES
LIGHT NUCLEI
LYSIS
MAGNETIC RESONANCE
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
METHYL RADICALS
MICROSTRUCTURE
MIXTURES
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SILICON COMPOUNDS
RADICALS
RESONANCE
SEMIMETALS
SILANES
SILICON
SILICON 29
SILICON COMPOUNDS
SILICON ISOTOPES
SILOXANES
SOLVOLYSIS
STABLE ISOTOPES