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Proceedings Paper

Fiber optic sensor for composite cure monitoring
Author(s): Joseph L. Lenhart; John H. van Zanten; Joy P. Dunkers; Carl G. Zimba; Calvin A. James; Steven K. Pollack; Richard S. Parnas
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Paper Abstract

The fiber/resin interface is critical to the final mechanical properties of a fiber reinforced composite material. To directly study this region, Robello siloxane (RBS) was grafted to glass surfaces. RBS contains a dimethylaminonitrostilbene fluorophore tethered to a isocyanatopropyltriethoxysilane coupling agent. Silane coupling agent chemistry was used to deposit small amounts of RBS to glass surfaces in a mixed silane layer with a diluting coupling agent. The fluorescence response of grafted RBS was sensitive to the chemical functionality of the diluting coupling agent. A blue shift in fluorescence from the grafted RBS dye can be followed during cure of an epoxy resin over layer, giving the technique potential to monitor cure in the interfacial region.

Paper Details

Date Published: 4 February 1999
PDF: 7 pages
Proc. SPIE 3589, Process Control and Sensors for Manufacturing II, (4 February 1999); doi: 10.1117/12.339955
Show Author Affiliations
Joseph L. Lenhart, Johns Hopkins Univ. (United States)
John H. van Zanten, Johns Hopkins Univ. (United States)
Joy P. Dunkers, National Institute of Standards and Technology (United States)
Carl G. Zimba, National Institute of Standards and Technology (United States)
Calvin A. James, Howard Univ. (United States)
Steven K. Pollack, Howard Univ. (United States)
Richard S. Parnas, National Institute of Standards and Technology (United States)

Published in SPIE Proceedings Vol. 3589:
Process Control and Sensors for Manufacturing II
David M. Pepper, Editor(s)

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