Chemistry Reference
In-Depth Information
1.3.3.3 SPECULAR REFLECTANCE SPECTRA OF COMMERCIAL
AL COATED POLYPROPYLENE FILM 2
The specular reflectance spectra of the surfaces of the commercial film 2
are seen in Fig. 1.8; curve 1 show the specular reflectance spectrum of the
polypropylene side of the film and curve 2 show the specular reflection
spectrum of the Al side of the film. While the polypropylene surface has
the spectrum of polypropylene, the Al coated surface reflected the infrared
rays. The absorbance values close to zero indicated that the light was not
absorbed but reflected by the Al surface.
FIGURE 1.8
Specular reflectance spectra of the film 2 (1) polypropylene surface (2) Al
coated surface of the film 1.
1.3.3.4 THICKNESS OF COMMERCIAL FILM 2
There were six refraction fringes observed in specular reflection spectrum
of commercial Film 2 in Fig. 1.5. Using Equation 1 and inserting values
of six fringes between 1600 cm
-1
to 2650 cm
-1
and the film thickness was
calculated as 19 µm.
1.3.3.5 SPECULAR REFLECTANCE SPECTRA OF MAGNETRON
SPUTTERED FILMS
The specular reflection spectra of uncoated and coated surfaces of poly-
propylene film prepared by Ozmihci et al. [5] are seen in Fig. 1.9. Both
