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- Ichimura Kunihiro
- Center of Advanced photopolymers, Faculty of Science, Toho University Research Center for Materials with Integrated Properties, Toho University
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This work proposes water-borne photopolymers cast and developed solely with neutral water by incorporating mechanically milled sub-micron particles of poorly water-soluble photoacid generators (PAGs) to make a poly(vinyl alcohol) film insoluble in water with aid of an acid-sensitive crosslinker. Fluorescence measurements of milled mixtures of anthracene and a tiny amount of tetracene in water revealed that the solid-state energy transfer occurs through singlet exciton migration as a result of mechanochemical crystal mixing. Solid-state electron transfer was also verified by fluorescence quenching of milled mixtures of PAG and emissive sensitizers including anthracene derivatives as a consequence of exciton diffusion in sensitizer crystals to reach at the particle surface to transfer an electron to PAG solid. Factors affecting solid-state electron transfer efficiency include the nature of PAG and sensitizers, particle sizes and exciton diffusion length, whereas bis[p-(tert-butylphenyl)]iodonium hexafluorophosphate (1a) was the best solid-state quencher. Solid-state sensitized photoacid generation was confirmed by irradiating aqueous dispersions of co-milled PAG and a sensitizer. Based on these results, three-component photopolymers comprised of an aqueous dispersion of PAG in absence or in the presence of a co-milled sensitizer, poly(vinyl alcohol) and a water-soluble diepoxy were prepared to exhibit photosensitivity of 17 mJ cm-2 by the direct photolysis of a dispersed sulfonium salt and that of ca.120 mJ cm-2 by the photolysis of 1a sensitized with co-milled 9, 10-dipropoxyanthracene.
収録刊行物
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- Journal of Photopolymer Science and Technology
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Journal of Photopolymer Science and Technology 20 (4), 605-614, 2007
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詳細情報 詳細情報について
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- CRID
- 1390282679300537984
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- NII論文ID
- 130004464593
- 40015602537
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- NII書誌ID
- AA11576862
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- COI
- 1:CAS:528:DC%2BD2sXot1Wmsbg%3D
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- ISSN
- 13496336
- 09149244
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- NDL書誌ID
- 8919486
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可