Improvement in Thermal Stability and Temperature Dependence of Diffractivity in Low-$T_{\text{g}}$ Photorefractive Polymers Dispersed with Plasticizers
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概要
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In the study to solve on the thermal instability due to the crystallization of additives for poly-N-vinylcarbazole (PVK)-based low-$T_{\text{g}}$ photorefractive polymers with ethylcarbazole (EtCz) as a plasticizer, it has been found that the addition of a dimeric analog of PVK, 1,3-biscarbazolyl propane (BisCzPro), is very effective, and the replacement of EtCz with BisCzPro or EtCz/BisCzPro mixtures enables us to control glass transition temperature ($T_{\text{g}}$) by changing the amount ratio of the additives and examine the temperature dependence of diffractivity while maintaining a transparent uniform film at high temperatures. As a result, we have clearly observed the existence of a specific temperature showing a maximum diffractivity, which is presumed to have resulted the decrease in the space field due to the detrapping and recombination of space charges by thermal agitation.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2004-09-15
著者
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YOKOYAMA Masaaki
Department of Agricultural Chemistry, Faculty of Agriculture, Kyushu University
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KURIHARA Shun-ichiro
Department of Material and Life Science, Graduate School of Engineering, Osaka University
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Tanaka Shin-ya
Department Of Applied Chemistry Saitama University
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Nagayama Norio
Department Of Material And Life Science Graduate School Of Engineering Osaka University
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Tanaka Shin-ya
Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Kurihara Shun-ichiro
Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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