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研究了光致聚合物的光化学反应理论模型及其动力学参量。合成了染料藻红B和亚甲基蓝作为联合光敏剂共同敏化的全息光存储光致聚合物材料。对材料测试分别得到在曝光波长为633 nm与曝光强度为65 mW/cm2时,透射率随曝光条件的变化关系以及材料各光化学参量。结果表明,随着曝光波长与曝光强度的增加,光致聚合物的光化漂白速率常数k与量子产率Φ增大,当曝光强度为65 mW/cm2时透射率在短波长下出现了下降,光化漂白速率常数k出现负值,而摩尔吸收系数ε在条件不同时则表现了不同的变化趋势。
The theoretical model of photochemical reaction of photopolymer and its kinetic parameters were studied. Dye-like alginate B and methylene blue were synthesized as a co-sensitized holographic optical storage photopolymer material by a combination of photosensitizers. The material tests were obtained at the exposure wavelength of 633 nm and exposure intensity of 65 mW / cm2, the transmittance changes with the exposure conditions and the material of the photochemical parameters. The results show that with the increase of exposure wavelength and exposure intensity, the photo-induced polymer bleaching rate constant k and the quantum yield Φ increase. When the exposure intensity is 65 mW / cm2, the transmittance decreases at short wavelength , Photochemical bleaching rate constant k appears negative, while the molar absorption coefficient ε shows different trends when the conditions are different.