Paper Title:
New LDPE Copolymeric Films with Enhanced Hydrophilic Properties Prepared by Gamma Irradiation
  Abstract

Graft copolymerization induced by gamma radiation has being used as a tool to modify the surface properties of a range of polymeric substrates. This work describes the use of this technique for the grafting of 2-hydroxyethyl methacrylate (HEMA) branches onto low-density polyethylene (LDPE) surface, in order to improve its hydrophilic properties. Sample preparation protocols were selected from previous work in order to obtain films with high grafting yields. The obtained PE-g-HEMA films were characterized by thermal analysis techniques (DSC and TGA), and by Fourier transform infrared spectroscopy (FTIR). The results obtained show that, upon irradiation, there is some loss of cristalinity of the copolymer backbone, but also that the samples keep a good thermal stability. The water uptake of the samples was evaluated. Hydration levels up to near 95 % with a ydration/dehydration average ratio of 1:5 were obtained.

  Info
Periodical
Materials Science Forum (Volumes 514-516)
Edited by
Paula Maria Vilarinho
Pages
1034-1038
DOI
10.4028/www.scientific.net/MSF.514-516.1034
Citation
L. M. Ferreira, A. N. Falcão, M. H. Gil, "New LDPE Copolymeric Films with Enhanced Hydrophilic Properties Prepared by Gamma Irradiation", Materials Science Forum, Vols. 514-516, pp. 1034-1038, 2006
Online since
May 2006
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$32.00
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