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Supercritical fluid infusion of silver into polyimide films of varying chemical composition

Published online by Cambridge University Press:  31 January 2011

J. Rosolovsky ,
R. K. Boggess ,
A. F. Rubira ,
L. T. Taylor ,
D. M. Stoakley  and
A. K. St. Clair
J. Rosolovsky
Affiliation:
Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
R. K. Boggess
Affiliation:
Department of Chemistry and Physics, Radford University, Radford, Virginia 24142
A. F. Rubira
Affiliation:
Departamento de Quimica, Universidade Estadual de Maringa, Av. Colombo 5790, 87020-900, Maringa-PR, Brazil
L. T. Taylor
Affiliation:
Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
D. M. Stoakley
Affiliation:
NASA Langley Research Center, Materials Division, Hampton, Viriginia 23665
A. K. St. Clair
Affiliation:
NASA Langley Research Center, Materials Division, Hampton, Viriginia 23665
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Abstract

Polyimides can be infused with silver complexes by the use of supercritical fluids. Highly reflective polyimide films were formed by infusing (1,5-cyclooctadiene-1,1,1,5,5,5-hexafluoroacetylacetonato)silver(I) [Ag(COD) (HFA)] into a number of polyimides and then thermally curing those films at 300 °C for time intervals between 30 min and 3 h. Reflectivities of the films exhibited strong dependence on the infusion and cure conditions as well as on the type of polyimide used. The highest reflectivity of 67.1% was achieved with a silvered film prepared from 3,3′,4,4′-benzophenonetetracarboxylic acid dianhydride (BTDA) and oxydianiline (ODA) infused at 5000 psi, 100 °C, for 30 min and cured for 1 h at 300 °C. Reflectivities of silvered surfaces of other polyimides investigated varied from 39% to 61%. A strong correlation between the presence of a ketonic group in the polyimide structure and the formation of mirror surfaces was detected.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 11 , November 1997 , pp. 3127 - 3133
Copyright
Copyright © Materials Research Society 1997

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References

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