S. Gouin et M. Gouterman, Ideality of pressure-sensitive paint. II. Effect of annealing on the temperature dependence of the luminescence, J APPL POLY, 77(13), 2000, pp. 2805-2814
This article reports the effect of annealing on a pressure-sensitive paint
(PSP) consisting of platinum tetra(pentafluorophenyl)porphine (PtTFPP) in a
fluoroacrylic polymer called FIB (Puklin, E.; Carlson, W. B.; Gouin, S.; C
ostin, C.; Green, E.; Ponomarev, S.; Tanji, H.; Gouterman, M. J Appl Polym
Sci 2000, 77, 2795). Samples annealed at 150 degrees C, 75 degrees C, annea
led by a heat gun, and dried at room temperature are compared to nonanneale
d samples. Temperature dependences of luminescence intensity and lifetime a
re studied as a function and pressure and temperature and fit with Arrheniu
s and Stern-Volmer equations. We find that heating above T-g is more import
ant than drying at room temperature in lowering the temperature dependence
and obtaining ideal PSP, ideal meaning independent effect of pressure and t
emperature on luminescence properties of the paint. Ideality is achieved by
lowering the activation energy for oxygen diffusion, presumably by relaxat
ion of the polymer network. It is shown that ideal behavior occurs only ove
r a limited temperature region. This range is more useful for PtTFPP in FIB
than for ruthenium bathophenanthroline in polydimethylsiloxane (PDMS), ano
ther common PSP formulation. (C) 2000 John Wiley & Sons, Inc.