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1,5-hydrogen transfer — a hitherto ignored decay channel in the photodegradation of poly(2,6-dimethyl-1,4-phenylene oxide)

✍ Scribed by Siegfried Schneider; Peter Gedeck; Josef Harrer; Frauke Richter; Timothy Clark

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
401 KB
Volume
257
Category
Article
ISSN
0009-2614

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✦ Synopsis

We present the results of a theoretical study and put forward a novel mechanism for the photodegradation of the polymer poly(2,6-dimethyl-l,4-phenylene oxide) (PPE). The primary step is a 1,5-hydrogen transfer from the methyl group of one ring system to the ipso-earbon of the adjacent monorneric unit. Therefore, in contrast to other proposed mechanisms, the primary step is a result of the three-dimensional structure of PPE rather than a consequence of structural defects in the polymer chain or of impurities.

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