折光指数也称为折射率或折光率。定义为光在真空中的传播速度与在某介质中传播速度之比,也称之为绝对折光指数。
The former one, synthesized from BES and XDI (xylene diisocyanate) through condensation -polymerization, has good optical and mechanical properties: good transmittance, weatherability, high refractive index (1.659), excellent impact resistance (izod impact strength 25-30kgcm/cm2), low density (1.34g/cm3) and dispersivity.
其一是采用BES和不变黄二异氰酸酯(XDI)原位聚合得到了折光指数高(1.659)、色散低(阿贝值30.1),耐冲击强度好(IPS=25~30kgcm/cm2)、密度较低(1.34g/cm3)、耐候性好的新型含硫聚氨酯光学塑料,室外放置100天颜色无变化。
参考来源 - 聚氨酯型聚合物光学塑料的设计合成及性能研究There are some other ways to analyzed the contents of menthol and menthone, such as polarimetry, refraction index method and acetylation method.
薄荷醇和薄荷酮含量的测定方法有旋光测定法、折光指数法及乙酰化法。
参考来源 - 中药薄荷草的化学成分分析研究·2,447,543篇论文数据,部分数据来源于NoteExpress
低收缩率,低光学吸收率,低折光指数粘合剂组合物。
Low shrinkage, low optical absorbance, low refractive index adhesive composition.
基于折光指数相匹配的理论,设计和计算了各组分的折光指数。
Based on refractive index match theory, the parameters are DE - signed and calculated.
对沸点、密度和折光指数的计算结果表明,计算值都很接近实验值。
The calculation of boiling points, densities and refractive indexes shows that the result of-calculation agrees with the experimental data very well.
应用推荐