含氟红敏光致聚合物全息材料的组成优化

Composition Optimization of Fluoro-Containing Red-Sensitive Photopolymer Holographic Materials

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。

Fluoro-containing polymer with low refractive index was used photopolymer holographic material to increase the spatial modulation range of its as the film-forming substance refractive index. Water Soluble, fluoro-containing polymer with low reflective index derived from the copolymers of 2, 2, 3, 3-tetrafluoropropyl methacrylate and methacrylic acid was prepared. The above polymer with low reflective index was used as the filmforming component, together with acrylamide as monomer, methylene blue as light-sensitive dye and triethanol amine as photo-initiator, for the preparation of photopolymer films for holographic recording. The photopolymer with optimized composition exhibited high sensitivity of 19 mJ/cm^2 and high diffraction efficiency of 93% at spatial resolution of 1580 lp/mm, better than that with water soluble polyvinyl alcohol （PVA） as the film-forming substance.