|
|
 |
| |
|
|
|
Molecular and Optical Investigations of Laser Radiation Influence in Makrofol LS 1-1 Polycarbonate |
|
|
|
PP: 47-52 |
|
|
|
doi:10.18576/jrna/040106
|
|
|
|
Author(s) |
|
|
|
Ali A. S. Alhazmi,
|
|
|
|
Abstract |
|
|
| Polymeric sheets of Makrofol material LS 1-1 were irradiated with IR-laser
fluence ranges from 1.5 to 18.0 J/cm$^2$. The impact of laser radiation on optical and molecular
features of Makrofol was studied by using various methods as intrinsic viscosity to measure
average molecular mass, refractive index, UV spectroscopy and color difference measurements.
The results ensure that the laser radiation cause rupture of bonds of the Makrofol samples when
irradiated with fluences up to 7 J/cm$^2$. The irradiation of laser in the range of fluences
7 - 18 J/cm$^2$ results in more compact structures of Makrofol, which led to enhancement the
molecular mass and raise the refractive index. Furthermore, the optical energy gap decreases
from 6.28 to 3.11 eV with increasing laser fluences to 18 J/cm$^2$, and related with the increase
the Urbach energy from 0.58 to 0.98 eV. Further, we investigated the transmission and color
changes of the samples in the range of wavelengths of 370-780 nm. The non-irradiated Makrofol
sample is almost colorless. It exhibited respectable color sensitivity to laser irradiation
that improvement in green and blue color components. |
|
|
|
|
|
|
|
