Tapping mode AFM evidence for an amorphous reticular phase in a condensation-cured hybrid elastomer: alpha,omega-dihydroxypoly(dimethylsiloxane)/poly(diethoxysiloxane)/fumed silica nanoparticles.

Tapping mode AFM evidence for an amorphous reticular phase in a condensation-cured hybrid elastomer: alpha,omega-dihydroxypoly(dimethylsiloxane)/poly(diethoxysiloxane)/fumed silica nanoparticles. Research Abstract Details 

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Tapping mode AFM evidence for an amorphous reticular phase in a condensation-cured hybrid elastomer: alpha,omega-dihydroxypoly(dimethylsiloxane)/poly(diethoxysiloxane)/fumed silica nanoparticles. Abstract Text:

Tomoki Ogoshi,Tomoko Fujiwara,Massimo Bertolucci,Giancarlo Galli,Emo Chiellini,Yoshiki Chujo,Kenneth J Wynne,

A new surface phenomenon is reported for hybrid nanocomposites comprising (1) a low Tg poly(dimethylsiloxane) (PDMS) phase cross-linked by (2) a siliceous phase (SP) generated by in situ hydrolysis/condensation of poly(diethoxysiloxane) (PDES), and (3) fumed silica nanoparticles (FSN). After ambient temperature cure, tapping mode atomic force microscopy (TM-AFM) easily reveals near-surface FSN. For nanocomposites with higher PDES content, FSN surprisingly "disappear" after a further cure at 100 degrees C. The observation is explained by further condensation of extant siliceous fragments creating an amorphous reticular phase, which acts as a mechanical barrier between the FSN and the AFM tip.

Tapping mode AFM evidence for an amorphous reticular phase in a condensation-cured hybrid elastomer: alpha,omega-dihydroxypoly(dimethylsiloxane)/poly(diethoxysiloxane)/fumed silica nanoparticles. Publishing Authors By Initials

T Ogoshi,T Fujiwara,M Bertolucci,G Galli,E Chiellini,Y Chujo,KJ Wynne,

For similar inorganic chemicals: silicon compounds: siloxanes research abstracts see: inorganic chemicals: silicon compounds: siloxanes research

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Tapping mode AFM evidence for an amorphous reticular phase in a condensation-cured hybrid elastomer: alpha,omega-dihydroxypoly(dimethylsiloxane)/poly(diethoxysiloxane)/fumed silica nanoparticles. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Journal of the American Chemical Society

VOLUME: 126

Page Numbers: 12284-5

Journal Abbreviation: J. Am. Chem. Soc.

ISSN: 0002-7863

DAY: 6

MONTH: Oct

YEAR: 2004

Tapping mode AFM evidence for an amorphous reticular phase in a condensation-cured hybrid elastomer: alpha,omega-dihydroxypoly(dimethylsiloxane)/poly(diethoxysiloxane)/fumed silica nanoparticles. Information

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LANGUAGE: eng

NlmUniqueID: 7503056

Tapping mode AFM evidence for an amorphous reticular phase in a condensation-cured hybrid elastomer: alpha,omega-dihydroxypoly(dimethylsiloxane)/poly(diethoxysiloxane)/fumed silica nanoparticles. Keywords Mesh Terms:

KEYWORDS: Siloxanes

MESH TERMS: chemistry

Chemical & Substance for Abstract: Tapping mode AFM evidence for an amorphous reticular phase in a condensation-cured hybrid elastomer: alpha,omega-dihydroxypoly(dimethylsiloxane)/poly(diethoxysiloxane)/fumed silica nanoparticles. Information

Substance Name: Silicon Dioxide

Registry Number: 7631-86-9

Grant and Affiliation Information for Tapping mode AFM evidence for an amorphous reticular phase in a condensation-cured hybrid elastomer: alpha,omega-dihydroxypoly(dimethylsiloxane)/poly(diethoxysiloxane)/fumed silica nanoparticles.

AFFILIATION: Chemical Engineering Department, School of Engineering, Virginia Commonwealth University, 601 West Main Street, Richmond, Virginia 23284-3028, USA.

Country: United States

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MEDLINETA: J Am Chem Soc

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