Positron annihilation studies of polyethylene filled with ultrasil

Changes in polyethylene (PE) when filled with Ultrasil have been studied by the method of positron annihilation. The results show that the temperature dependence τ 3 is almost the same for all samples. Changes, however, occur in the intensities I 3 and I 2. I 3 has the highest values in pure PE and...

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Bibliographic Details
Published in:European polymer journal 1993, Vol.29 (1), p.95-97
Main Authors: TINO, J, KRISTIAK, J, HLOUSKOVA, Z, SAUSA, O
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Exact sciences and technology
Forms of application and semi-finished materials
Polymer industry, paints, wood
Technology of polymers
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Summary:Changes in polyethylene (PE) when filled with Ultrasil have been studied by the method of positron annihilation. The results show that the temperature dependence τ 3 is almost the same for all samples. Changes, however, occur in the intensities I 3 and I 2. I 3 has the highest values in pure PE and gradually decreases with increasing Ultrasil concentration; I 2 shows the opposite trend. The effects result from local densifications, which increase with increasing concentration of Ultrasil (increase of I 2) and decreasing number of sites in which positronium can be stabilized.
ISSN:0014-3057
1873-1945
DOI:10.1016/0014-3057(93)90278-N