Effects of clinical X-ray irradiation on UHMWPE films

N. Stojilovic, S. V. Dordevic, S. Stojadinovic

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Irradiation of biocompatible polymers is generally performed using 60Co gamma sources delivering high doses of radiation, ranging from kGy to MGy levels. This irradiation is typically employed for sterilization and/or crosslinking purposes. However, exposure to gamma rays may generate free radicals responsible for polymer degradation and, therefore, studies of the irradiation effects on these polymers are of great practical interest. In this study, ultra-high molecular weight polyethylene (UHMWPE) films were exposed to high-energy photons to doses comparable to those used in radiotherapy for patients with cancer. Specifically, three dose levels of 30, 60, and 120 Gy were delivered utilizing linear accelerator X-rays (6 MV) and irradiation effects were studied using X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR), and Ultraviolet–visible (UV–vis) spectroscopy. It was found that radiation doses up to 120 Gy do not change the polymer crystallinity but affect its optical properties. In particular, the decrease in the optical band gap is observed in irradiated polymers.

Original languageEnglish (US)
Pages (from-to)139-143
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume410
DOIs
StatePublished - Nov 1 2017

Keywords

  • Band-gap
  • Clinical X-rays
  • Optical spectroscopy
  • UHMWPE

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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