Gamma Rays Induced Modification in Ultrahigh Molecular Weight Polyethylene (UHMWPE)

Abstract

Modifications taking place in ultrahigh molecular weight polyethylene (UHMWPE) films due to gamma ray radiation-induced and investigated in correlation with the applied doses. Films were irradiated in a vacuum at room temperature by a 1.25 MeV Co60 a source with doses ranging from 0 to 300 kGg. The optical, chemical, structural, and surface morphological properties of the irradiated and unirradiated UHMWPE films were investigated by UV-Visible, FTIR, XRD, and SEM, respectively. The band gap E g decreases with increasing radiation dose and coloration effects have been seen at higher doses. FTIR spectra show an oscillatory behavior in the transmittance intensities without affecting in their peak positions. Number of small absorption peaks can be seen clearly which may be due to the cross-linking of the polymeric chain. No significant change in crystalline peak has been found in the X-ray diffraction pattern indicating the structural stability of the polymer. The morphology of the smooth topography of the polymer samples to change rougher one polymeric sample shows the formation of microvoids on the surface of the polymeric materials with the increase of the doses from 0 to 300 kGy.

Structural and optical analysis of gamma-induced modification in polycarbonate nuclear track detector

“…Furthermore, the gamma irradiation exposure has a great influence on the morphological, optical and structural properties of the polymeric materials and polymer composition, due to the destruction of the chemical bonds and creation of highly energetic electrons as a result of the influence of γ-irradiation [4][5][6][7][8][10][11][12][13][14][15][16]. Many researchers have exerted considerable efforts using gamma rays to improve the properties of different polymeric materials to increase their use area in many applications [17][18][19][20][21].…”

Improving photoluminescence, optical and electrical characteristics of PMMA films with gamma irradiation

“…These processes lead to defects within the polymer chain backbone, which are responsible for the altered optical, electrical, mechanical and structural properties of irradiated polymer films, as well as changes in colour (Zaki et al 2020a;Zaki et al 2020b;Zaki et al 2015). Many scientists have worked hard to modify the properties of many polymeric materials utilising gamma rays, allowing them to be used in a wider range of applications (Zaki et al 2020b;Krystyna Cieśla, Abramowska (2021); Aarya et al 2021;Yu Gu et al 2021;Park et al 2021). However, due to their dielectric properties, their use in micro-and optoelectronics is still limited.…”