光致聚合物中单体及粘结剂对全息性能的影响

研究了单体及粘结剂等成份对全息光致聚合物薄膜光存储性能的影响。在相同引发条件下．以丙烯酰胺作为单体时，光聚物的衍射效率明显高于以丙烯酸和N羟甲基丙烯酰胺作为单体时光聚物的衍射效率。向丙烯酰胺中加入少量N-羟甲基丙烯酰胺，可以改善膜表面的光学质量．降低散射光强度，并提高膜的保存时间。在聚乙烯醇膜中单体聚合程度明显优于在聚乙烯吡咯烷酮中的程度，在大分子量的聚乙烯醇中的衍射效率及感光灵敏度高于在小分子量中的衍射效率和感光灵敏度，而且大分子量的聚乙烯醇能够制备厚膜，这是实现全息海量存储的一个重要因素。

Effects of monomers and binders in the photopolymer on holographic storage properties are studied. Under the same initiator conditions, diffraction efficiency of photopolymer with an acrylamide monomer is significantly larger than that of acrylic acid and N-hydroxymethylacrylamide monomers, respectively. N-hydroxymethylacrylamide can improve optical quality, reduce scattering intensity, and increase the shelf life time of the films. Compared with polyvinylpyrrolidone (PVP), polymerization degree of monomer in the polyvinylalcohol (PVA) is higher. Diffraction efficiency and energetic sensitivity are larger in the PVA with a high average molecular weight than in the PVA with low average molecular weight. The PVA with a high average molecular weight can be used to prepare thick films, and it is an important factor to realize the mass capacity of holographic data storage.