Optical properties of poly (ethyl methacrylate) - cellulose acetate propionate blend film irradiated with Nd:YAG laser

• Published in: Journal of polymer research Vol. 27; no. 4
• Main Authors: Mahmoud, K. H., Elsayed, Khaled A., Kayed, T. S.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 2020; Springer Nature B.V
• Subjects: Cellulose acetate; Cellulose propionates; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Crosslinking; Energy gap; Fluence; Industrial Chemistry/Chemical Engineering; Irradiation; Laser beams; Lasers; Neodymium lasers; Optical properties; Original Paper; Polymer Sciences; Pulse duration; Refractivity; Semiconductor lasers; YAG lasers; CAP; Band gap; PEMA; UV laser irradiation
• ISSN: 1022-9760; 1572-8935
• DOI: 10.1007/s10965-020-02060-1

Poly (ethyl methacrylate) (PEMA) - cellulose acetate propionate (CAP) blend film was prepared using the cast technique. A Q-switched Nd: YAG laser beam with a wavelength of 266 nm, a pulse duration of 10-ns, a repetition rate10 Hz and 0.018 J/cm 2 fluence was used to irradiate the prepared film. The optical absorption of pristine and irradiated sample was studied within 200–500 nm wavelength region. The absorbance increases with laser irradiation time over the full wavelength region which is attributed to an increase of the crosslinking network. Examining Tauc plots revealed a transition of the direct allowed type with optical energy gap value of 4.92 eV for the pristine blend film which has decreased to 4.30 eV after laser irradiation for 90 min. The refractive index, finesse coefficient, dielectric function, Brewster, and critical angles demonstrated dispersion in the 200–500 nm wavelength range.