Title

Consumption of the molecular oxygen in polymerization systems using photosensitized oxidation of dimethylanthracene

Document Type

Article

Peer Reviewed

1

Publication Date

5-1-2006

Journal/Book/Conference Title

Chemical Engineering Communications

DOI of Published Version

10.1080/00986440500193921

Abstract

It is well known that the presence of oxygen in free radical polymerization systems leads to an inhibition period and a lowered ultimate conversion. In this contribution, we report a method for consuming molecular oxygen photochemically before the polymerization takes place, thereby allowing the reaction to proceed in an oxygen-free environment. The method is based on the generation of singlet oxygen by reaction of the ground state oxygen with the excited triplet state of the singlet oxygen generator (a porphyrin, Znttp). The singlet oxygen is then consumed by reaction with a second compound (the singlet oxygen trapper, dimethylanthracene). The possible factors that might affect the efficiency of the singlet oxygen generation/trapping processes were discussed and the effectiveness of a dimethylanthracene/Znttp combination for consumption of oxygen was investigated in two acrylate systems of different viscosity.

Keywords

Sustainability

Published Article/Book Citation

Chemical Engineering Communications, 193:5 (2006) pp.620-627.

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URL

https://ir.uiowa.edu/cbe_pubs/23