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UV-Spectroscopic Investigation of the Photopolymerization Process in the Formation of Optically Transparent Polymer Medium
Abstract
The reason for the increase in the transparency of the polymer obtained in the presence of a small addition of molecular iodine in the liquid photopolymerizing composition is satisfactorily explained by the formation of a charge transfer (CT) π,σ-type complexe: oligocarbonate dimethacrylate with molecular iodine. The CT-band (360 nm) absorbs a significant part of actinic radiation, as a result of which the rate of photolytic decomposition of the photoinitiator at the initial stage of polymerization satisfies the condition of the free volume output from the polymer to the liquid part of the photopolymercompozite. At deeper stages the principle of layer-by-layer photopolymerization is realized. This is possible due to the consistent enlightenment of the thin upper layers exposed to UV light.
About the Authors
M. A. Lopatin
G. A. Razuvayev Institute of Metalloorganic Chemicals of the Russian Academy of Sciences
Russian Federation
Russian Federation
Nizhny Novgorod
V. V. Semenov
G. A. Razuvayev Institute of Metalloorganic Chemicals of the Russian Academy of Sciences
Russian Federation
Russian Federation
Nizhny Novgorod
V. M. Treushnikov
G. A. Razuvayev Institute of Metalloorganic Chemicals of the Russian Academy of Sciences
Russian Federation
Russian Federation
Nizhny Novgorod
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Review
For citations:
Lopatin M.A., Semenov V.V., Treushnikov V.M. UV-Spectroscopic Investigation of the Photopolymerization Process in the Formation of Optically Transparent Polymer Medium. Zhurnal Prikladnoii Spektroskopii. 2024;91(3):361-366. (In Russ.)
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