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Title: Thermal, tensile and rheological properties of high density polyethylene (HDPE) processed and irradiated by gamma-ray in different atmospheres

The aim of this paper is to investigate structural changes of high density polyethylene (HDPE) modified by ionizing radiation (gamma rays) in different atmospheres. The gamma radiation process for modification of commercial polymers is a widely applied technique to promote new physical-chemical and mechanical properties. Gamma irradiation originates free radicals which can induce chain scission or recombination, providing its annihilation, branching or crosslinking. This polymer was irradiated with gamma source of {sup 60}Co at doses of 5, 10, 20, 50 or 100 kGy at a dose rate of 5 kGy/h. The changes in molecular structure of HDPE, after gamma irradiations were evaluated using thermogravimetric analysis (TGA) and tensile machine and oscillatory rheology. The results showed the variations of the properties depending on the dose at each atmosphere.
Authors:
; ; ;  [1] ;  [2]
  1. Center of Chemistry and Environment, Institute of Energy and Nuclear Research - IPEN (Brazil)
  2. Faculdades Oswaldo Cruz (Brazil)
Publication Date:
OSTI Identifier:
22271312
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1593; Journal Issue: 1; Conference: PPS-29: 29. international conference of the Polymer Processing Society, Nuremberg (Germany), 15-19 Jul 2013; Other Information: (c) 2014 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ATMOSPHERES; COBALT 60; CROSS-LINKING; GAMMA RADIATION; IRRADIATION; MODIFICATIONS; MOLECULAR STRUCTURE; POLYETHYLENES; RADIATION DOSES; RADIATION EFFECTS; RHEOLOGY; TENSILE PROPERTIES; THERMAL GRAVIMETRIC ANALYSIS; VARIATIONS