REFRACTOMETRIC AND LIGHT-SCATTERING PARAMETERS AT 633 NM FOR POLYSTYRENE SOLUTIONS
REFRACTOMETRIC AND LIGHT-SCATTERING PARAMETERS AT 633 NM FOR POLYSTYRENE SOLUTIONS
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DOI：
10.1016/0014-3057(89)90002-5
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发表时间：
1989-01-01
影响因子：
6
通讯作者：
RADWAN, MA
中科院分区：
文献类型：
--
作者：
HUGLIN, MB;ODONOHUE, SJ;RADWAN, MA
几种溶剂在633 nm处的折射率通过精确服从柯西色散从其他波长（λ0）的测量值插值得到。测定的聚苯乙烯在溶液中的部分比容与溶剂有关，其值小于聚合物的比容。给出了用aq. KCl在λ0（包括633 nm）不同值处标定微分折光计的多项式。聚苯乙烯在几种溶剂中的比折射率增加（dn/dc），在λ0的三个值下测量，遵循柯西色散，得到633 nm处的值与直接在该波长测量的值很好地一致。讨论了用于获得dn/dcby计算的各种程序，但即使是最有利的程序也只推荐用于dn/dc大于或等于ca±0.15 cm3g−1的系统。根据苯的标准值，确定了几种液体在633 nm垂直偏振光下的总瑞利比。
Refractive indices of several solvents at 633 nm have been interpolated via an accurately obeyed Cauchy dispersion from measured values at other wavelengths (λ0). A dependence on solvent has been observed for the measured partial specific volume of polystyrene in solution and the values are smaller than the specific volume of the polymer. Polynomials are presented for calibration of a differential refractometer with aq. KCl at different values ofλ0including 633 nm. Specific refractive index increments (dn/dc) of polystyrene in several solvents, measured at three values ofλ0, follows a Cauchy dispersion, which yields values at 633 nm in good accord with those measured directly at this wavelength. Various procedures are discussed for obtaining dn/dcby calculation, but even the most favourable is recommended only for systems in which dn/dc⩾ca± 0.15 cm3g−1. Total Rayleigh ratios of several liquids for vertically polarized light at 633 nm have been determined on the basis of a standard value for benzene.