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首页> 外文期刊>Journal of Applied Polymer Science >A convenient method to determine the Rayleigh ratio with uniform polystyrene oligomers
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A convenient method to determine the Rayleigh ratio with uniform polystyrene oligomers

机译：用均匀的聚苯乙烯低聚物测定瑞利比的简便方法

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摘要

The Rayleigh ratio of toluene at 25 degrees C for a wavelength of 632.8 nm was determined by static light scattering measurement of a certified polystyrene reference material PS 2400 with exactly evaluated or certified mass-average molecular mass (M-w). At first, static light scattering measurements were carried out for PS 2400 in toluene with a literature value of the Rayleigh ratio of toluene. Then, corrections of degree of depolarization, density fluctuations, and molecular mass dependence of refractive index increment were applied to the observed M-w of PS 2400 to obtain apparent M-w. Finally, from the ratio between the apparent M-w, and the certified M the Rayleigh ratio of toluene was reevaluated. (c) 2005 Wiley Periodicals, Inc.
机译：通过对具有精确评估或认证的质均分子量（M-w）的认证聚苯乙烯参考材料PS 2400的静态光散射测量，确定25摄氏度下632.8 nm波长下甲苯的瑞利比。首先，用甲苯的瑞利比的文献值对PS 2400在甲苯中进行静态光散射测量。然后，对观察到的PS 2400的M-w进行去极化度，密度波动和折射率增量的分子质量依赖性的校正，以获得表观M-w。最后，根据表观M-w与标准M的比值，重新评估了甲苯的瑞利比。 （c）2005年Wiley Periodicals，Inc.

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