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几种宽带敏感的光致聚合物光化反应动力学研究
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摘要
光致聚合物材料具有衍射效率高、感光灵敏度高、折射率调制度大、成本低廉、制作简单等优点,这使其成为人们研究光全息存储材料领域中的重点和热点,同时光致聚合物也被认为是最有前途和最先被用作全息存储的介质,目前在高密度全息存储研究方面,越来越多的科研人员和机构开始关注光致聚合物材料的研究并取得了丰富的成果。
     本文在总结光致聚合物材料的研究现状的基础上,制作几种宽带敏感的光致聚合物样品,并对它们的光化反应动力学过程进行了一定研究:
     1.分别合成了VB2敏化的光致聚合物(样品1),VB2与Azure I共同作为光敏剂敏化的的光致聚合物(样品2),VB2与AzureⅡ共同作为光敏剂敏化的的光致聚合物(样品3),并分别测试了三种样品的吸收谱线。
     2.测试了VB2敏化的光致聚合物(样品1)不同染料浓度下的衍射效率以及透过率实验数值,并对透过率实验数值进行了曲线拟合。通过拟合曲线,得出了不同染料浓度下VB2敏化的光致聚合物的光漂白速率常数kp、摩尔吸收系数ε、量子产率φ、散射损失相关系数T_(sf)的具体数值,并对其变化规律进行了讨论。
     3.测试了VB2和Azure I共同敏化的光致聚合物(样品2)不同膜厚度下的透过率实验数值,并对实验数值进行了曲线拟合。通过拟合曲线,得出了不同膜厚度下VB2和Azure I共同敏化光致聚合物的光漂白速率常数k_p、摩尔吸收系数ε、量子产率φ、散射损失相关系数T_(sf)的具体数值并对其变化规律进行了讨论。
     4.测试了VB2和AzureⅡ共同敏化的光致聚合物(样品3)不同曝光强度下的透过率实验数值,并对实验数值进行了曲线拟合。通过拟合曲线,得出了不同曝光强度下VB2和AzureⅡ共同敏化光致聚合物的光漂白速率常数k_p、摩尔吸收系数ε、量子产率φ、散射损失相关系数T_(sf)的具体数值并对其变化规律进行了讨论。
     5.测试了VB2和AzureⅡ共同敏化的光致聚合物(样品3)不同曝光波长的透过率实验数值,并对实验数值进行了曲线拟合。通过拟合曲线,得出了不同曝光波长下VB2和AzureⅡ共同敏化光致聚合物的光漂白速率常数k_p、摩尔吸收系数ε、量子产率φ、散射损失相关系数T_(sf)的具体数值并对其变化规律进行了讨论。
Photopolymer has many advantages: high diffraction efficiency, high photosensitive sensitivity, high refraction modulation, easy fabrication and low cost etc. These advantages make it become the hotspot and focus for people in the field of holographic storage materials, meanwhile photopolymer is also believed to be the most promising and first used as holographic storage materials. More and more scientists and organizations began to focus on the photopolymer materials and some achievements have been done.
     Based on the summarizing of the present research on the photopolymers, several photopolymers with broadband sensitive spectral range were fabricated. Meanwhile, a certain research on the holographic characteristics and photochemical kinetics of these photopolymers had been done.
     1. The absorption spectrums of three kinds of dyes were tested. a photopolymer material was fabricated Sensitized by VB2 (sample1). Meanwhile, Sensitized by VB2 and Azure I (sample2).In addition, a VB2 and Azure II sensitized photopolymer for holographic storage was prepared (sample3).
     2. The photopolymers’experimental values of transmittance in different dyes concentration sensitized by VB2 were tested.
     3. Through the fitting curves, the photopolymers’values of the molar absorption coefficientε, the quantum yieldφ, the photobleaching coefficient k_p and the scattering loss correlation coefficient T_(sf) in different dyes concentration sensitized by VB2 were tested ,and the change rules were discussed.
     4. The photopolymers’experimental values of transmittance in different film thickness sensitized by VB2 and Azure I were tested.
     5. Through the fitting curves, the photopolymers’values of the molar absorption coefficientε, the quantum yieldφ, the photobleaching coefficient k_p and the scattering loss correlation coefficient T_(sf) in different film thickness sensitized by VB2 and Azure I were tested ,and the change rules were discussed.
     6. The photopolymers’experimental values of transmittance in different exposure intensity sensitized by VB2 and Azure II were tested.
     7.Through the fitting curves, the photopolymers’values of the molar absorption coefficientε, the quantum yieldφ, the photobleaching coefficient k_p and the scattering loss correlation coefficient T_(sf) in different exposure intensity sensitized by VB2 and Azure II were tested ,and the change rules were discussed.
     8. The photopolymers’experimental values of transmittance in different exposure wavelength sensitized by VB2 and Azure II were tested.
     9.Through the fitting curves, the photopolymers’values of the molar absorption coefficientε, the quantum yieldφ, the photobleaching coefficient kp and the scattering loss correlation coefficient Tsf in different exposure wavelength sensitized by VB2 Azure II were tested ,and the change rules were discussed.
引文
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