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用低折射率的含氟共聚物为光致聚合物全息材料的成膜物,以增加全息记录材料折射率的空间可调制程度。用溶液聚合法合成了低折射率的水溶性甲基丙烯酸2,2,3,3-四氟丙酯-甲基丙烯酸共聚物(折射率为1.441),以该共聚物为成膜物质,丙烯酰胺为单体、亚甲基蓝为光敏染料、三乙醇胺为引发剂配制了光致聚合物薄膜;经过对光致聚合物组成构成的优化,在空间分辨力为1580lp/mm时,光致聚合物薄膜的灵敏度约为19 mJ/cm2,衍射效率可达93%,两者均优于以聚乙烯醇(PVA)为成膜物质的光致聚合物材料。
The use of a low refractive index fluorocopolymer as a film-forming substance for a photopolymer holographic material increases the degree of spatial modulation of the refractive index of the holographic recording material. A low refractive index, water-soluble 2,2,3,3-tetrafluoropropyl methacrylate-methacrylic acid copolymer (refractive index 1.441) was synthesized by solution polymerization. Using this copolymer as a film-forming substance, Amide is a monomer, methylene blue is a photosensitive dye, and triethanolamine is used as an initiator to prepare a photopolymer film. After the composition of the photopolymer is optimized, when the spatial resolution is 1580 lp / mm, the photopolymer film The sensitivity is about 19 mJ / cm2 and the diffraction efficiency is up to 93%, both of which are better than the photopolymer materials with polyvinyl alcohol (PVA) as the film-forming material.