聚合物分散液晶的制备及拉曼光谱分析

The Preparation and Raman Spectral Analysis about Polymer-dispersed Liquid Crystals

用溶致相分离的方法制备了以PMMA为基体的四种不同配比的聚合物分散液晶(PDLC),四氢呋喃为引发剂,并且通过傅立叶拉曼光谱仪对其进行检测,分析其光谱,观察各单体混合前后性质的变化,鉴别聚合物分散液晶的物质构成。此外,在指定的组分前提下,根据液晶最强峰与PMMA特征峰的相对强度拟合曲线得出PDLC中液晶与PMMA的质量百分比,为下一步研究聚合物分散液晶系统的光折变特性提供指导。

Four polymer-dispersed liquid crystals（PDLC） dope with C4H30 as photoconductive sensitizer were presented. To qualitative analyses the PDLC, FT-Raman Module was to identify the contents and characteristic changes of it. Basing on the intensity ratio of liquid crystal 5CB. Raman peak and the characterizing Roman peak of PMMA measured at the same time, one can quantitatively obtain the real 5CB concerns, hence providing an effective direction for the photorefractive effect.