New Experiments Concerning the Mechanism of the Solid State Photopolymerization of Di-Styrylpyrazine
- 1 July 1983
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 96 (1) , 121-139
- https://doi.org/10.1080/00268948308074698
Abstract
Defects in Distyrylpyrazine (DSP) monomer crystals haven been investigated by Transmission Electron Microscopy (TEM), light microscopy and synchroton topography. The onset of the photoreaction causes a multiplication of the defects. The course of the photoreaction as well as the product and stress distribution in the crystal are strongly wavelength dependent. Fracture of the crystals can be prevented under special irradiation conditions. A crystal structure analysis of a photoproduct in a four-center-type photopolymerization is available now for the first time. The chemical composition of these crystals has been determined by gelpermeation chromatography (GPC). The results are discussed with respect of the solid state reaction mechanism.Keywords
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