5
Published
2022-11-12
Section
Articles
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Copyright (c) 2023 Noor A. Darweesh, Asrar A. Saeed, Mahasin F. Al- Kadhemy
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Influence of Weathering on Physical Properties and Sun Light Transmitted through PMMA/ Safranin Films for Greenhouse Applications
Noor A. Darweesh
Asrar A. Saeed
Mahasin F. Al- Kadhemy
Keywords: Safranin Dye, Polymethylmethacrylate, Weathering, Sun Light
Abstract
The effect of weathering on physical properties of pure Poly methyl Methacrylate (PMMA) film and PMMA/ Safranin (S) films for Greenhouse applications has been studied. The solution casting method was used to prepare pure PMMA and PMMA/S films with dye solution (18ml), The concentration of Safranin solution was (1×10-4 mole/liter).
Weathering process will be done for these samples at different exposure sun light times (76, 152 and 228) h. Weathering affected on maximum absorption wavelength of Safranin to shift to lower wavelength (520nm) and decrease the absorbance. Also, the optical energy gap will decrease for pure PMMA from (5eV) to (4.8eV) and PMMA/S (18ml) from (5.02eV) to (4.82eV). FTIR results showed that there is no chemical interaction occurs between Safranin and PMMA Polymer, only physical interaction will be occurred. After weathering, the peaks in FTIR spectra shifted slightly and transmitted decreases with increasing the weathering time. These will confidently photostability of these films under weathering conditions and possibility to use them in greenhouse application. It can be concluded that the PMMA /S (18ml) film is better in green house applications in terms of absorption, energy gap and Sun light transmittance, where it is the highest possible transmitted from (10 A.M.) to (3 P.M.).
