Abstract
Views In this paper, effect of the pulsed CO2 laser irradiation on optical properties and surface morphology of PMMA was investigated. The samples were irradiated by a CO2 pulsed laser with the wavelength of 9.55 micron and the pulse duration of about 100 ns. UV-Visible spectroscopy and Scanning Electron Microscopy (SEM) were used for investigating the change in absorption, reflection, refractive index and surface morphology, respectively.
Highlights
As it can be seen from the figures, for all the samples and with increasing the number of pulses, the surface transmission decreases; while, the changes in reflection and the refractive index are dependent on the laser fluence and the number of pulses
The changes in surface morphology is a result of laser irradiation with high number of pulses at fluences below the ablation threshold or lower number of pulses at fluences above the ablation threshold
PMMA polymer was irradiated with a pulsed CO2 laser to investigate the effect of the laser irradiation on its optical properties
Summary
These stresses can lead to cracking, surface morphology modification or optical properties changing. Radical formation and nanostructuring of the surface are two important results of laser irradiation at fluences below the ablation threshold. Optical properties modification and surface morphological changes of PMMA following pulsed CO2 laser irradiation are investigated.
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