✦ LIBER ✦

Identification of luminescence centres in low density polyethylene

✍ Scribed by I. Boustead; A. Charlesby

Publisher: Elsevier Science
Year: 1967
Tongue: English
Weight: 687 KB
Volume: 3
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(67)90014-6

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✦ Synopsis

Using fluorescence, phosphorescence and thermoluminescence techniques it is established that there are several types of luminescence centres, most of which are unattached to the polymer main chain and distributed in different structural regions. The principal centres in the amorphous regions are free molecules of anthracene and a derivative of phenanthrene with possibly molecules of a naphthalene derivative attached to the polymer chain. In the crystalline region the luminescence centres are almost entirely benzoic acid with some alkyl-aryl ketone, the latter being formed from benzoic acid by oxidation. The presence of other luminescence centres is demonstrated, but identification is only tentative.

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