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Interfacial Interactions in Silica Reinforced Silicones.

ADA223425

Publication Date	1990
Personal Author	Aranguren, M. I.; Macosko, C. W.; Thakkar, B.; Tirrell, M.
Page Count	7
Abstract	The study of the type and strength fo the filler-polymer linkages is of great importance in understanding the reinforcement of elastomers. Silicone rubbers are weak elastomers and the addition of reinforcing fillers is essential in order to obtain useful, strong materials. The best reinforcing filler for these elastomers are fumed silicas. These fillers, like reinforcing carbon blacks, have very complex structures. Both have fractal characteristics, small particles fused together forming open aggregates that can cluster by physical forces. Silicas have sometimes more complex structures than carbon blacks, but have a better understood surface chemistry. Interactions between polydimethylsiloxanes and silica surfaces have been studied using heat of adsorption measurement of mostly low molecular weight analogs or inferring the strength of the adsorption by the shift of particular peaks in the infrared spectrum. Here we will present a new technique that measures directly the strength of the adsorption of the polymer segments onto glass and between themselves. It also allows for comparison of the strength of such bonds with the strength of a polymer entanglement link. Keywords: Polydimethylsiloxane, Silica, Interfacial interactions, Reprints, Surface chemistry, Interfacial interactions, Silicones, Reinforcements, Fillers, PDMS, Polymers, Elastomers and rubber. (JG)
Keywords	Reinforcing materials Interactions Interfaces Elastomers Polymers Silicon dioxide Silicones.25 Addition Fillers Carbon black Structures Adsorption Heat Measurement Comparison Strength(General) Infrared spectra Analogs Lightweight Molecular weight Reprints Solid-solid interfaces Fractal characteristics Polydimethylsiloxane PDMS
Source Agency	Non Paid Reprints
NTIS Subject Category	99F - Physical & Theoretical Chemistry 99C - Polymer Chemistry 71H - Elastomers 41K - Engineering Materials
Corporate Authors	Minnesota Univ., Minneapolis. Dept. of Chemical Engineering and Materials Science.
Supplemental Notes	Pub. in Mat. Res. Soc. Sym-. Proc., v170 p303-308 1990.
Document Type	Journal Article
NTIS Issue Number	199021
Contract Number	N00014-88-K-0366

Interfacial Interactions in Silica Reinforced Silicones.

Interfacial Interactions in Silica Reinforced Silicones.
ADA223425

Publication Date	1990
Personal Author	Aranguren, M. I.; Macosko, C. W.; Thakkar, B.; Tirrell, M.
Page Count	7
Abstract	The study of the type and strength fo the filler-polymer linkages is of great importance in understanding the reinforcement of elastomers. Silicone rubbers are weak elastomers and the addition of reinforcing fillers is essential in order to obtain useful, strong materials. The best reinforcing filler for these elastomers are fumed silicas. These fillers, like reinforcing carbon blacks, have very complex structures. Both have fractal characteristics, small particles fused together forming open aggregates that can cluster by physical forces. Silicas have sometimes more complex structures than carbon blacks, but have a better understood surface chemistry. Interactions between polydimethylsiloxanes and silica surfaces have been studied using heat of adsorption measurement of mostly low molecular weight analogs or inferring the strength of the adsorption by the shift of particular peaks in the infrared spectrum. Here we will present a new technique that measures directly the strength of the adsorption of the polymer segments onto glass and between themselves. It also allows for comparison of the strength of such bonds with the strength of a polymer entanglement link. Keywords: Polydimethylsiloxane, Silica, Interfacial interactions, Reprints, Surface chemistry, Interfacial interactions, Silicones, Reinforcements, Fillers, PDMS, Polymers, Elastomers and rubber. (JG)
Keywords	Reinforcing materials Interactions Interfaces Elastomers Polymers Silicon dioxide Silicones.25 Addition Fillers Carbon black Structures Adsorption Heat Measurement Comparison Strength(General) Infrared spectra Analogs Lightweight Molecular weight Reprints Solid-solid interfaces Fractal characteristics Polydimethylsiloxane PDMS
Source Agency	Non Paid Reprints
NTIS Subject Category	99F - Physical & Theoretical Chemistry 99C - Polymer Chemistry 71H - Elastomers 41K - Engineering Materials
Corporate Authors	Minnesota Univ., Minneapolis. Dept. of Chemical Engineering and Materials Science.
Supplemental Notes	Pub. in Mat. Res. Soc. Sym-. Proc., v170 p303-308 1990.
Document Type	Journal Article
NTIS Issue Number	199021
Contract Number	N00014-88-K-0366