S. Gouin et M. Gouterman, Ideality of pressure-sensitive paint. IV. Improvement of luminescence behavior by addition of pigment, J APPL POLY, 77(13), 2000, pp. 2824-2831
We report the effect of inorganic pigments on the diffusion properties of a
polymer matrix. The presence of pigments has a large effect on the frequen
cy factor and the activation energy of the diffusion of oxygen in the polym
er matrix. This effect is used to modify the overall temperature dependence
of the luminescence in pressure-sensitive paint (PSP). Ideality of lumines
cence (i.e., independent effect of pressure and temperature on the luminesc
ence intensity) can be achieved with a PSP formulation by using a low-cost
and commercial silicone polymer using Al2O3 as the pigment. Ideality temper
ature limits (ITL) can be tailored by adjusting the pigment volume concentr
ation (PVC) in the paint formulation. With the appropriate adjustment of PV
C, the luminescence characteristics of the PSP can be designed to suit the
particular needs of the Rind-tunnel researchers. (C) 2000 John Wiley & Sons
, Inc.