Refractive Index of Liquids at Elevated Temperatures

Lauer, J. L.; King, R. W.

doi:10.1021/ac60119a018

Cited by 13 publications

(1 citation statement)

References 13 publications

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“…Data at higher t c ,nperatures are limited ; however, measurements have been reported for c 1 6 and c 3 6 over the range 80-100°C. 26 Li et a1.22 found the equation…”

Section: Performance and Calibrationmentioning

confidence: 98%

A scattered‐light study of linear polyethylenes

Stacy

Arnett

1964

J. Polym. Sci. A Gen. Pap.

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synopsisA scattered-light photometer particularly adapted to high temperature work has been designed and constructed. Among the desirable features are constant monitoring of the primary beam, placement of photodetectors outside the heated zone, output proportional to ratio of outputs of matched detectors, thus to Rayleigh's ratio, insensitivity of output readings to light absorption by the solution, temperature control from room temperaturc to 150°C. The geometrical factors affecting output readings have been analyzed and the instrument calibrated using several standards. Techniques developed for hot solution clarification and the measurement with good precision of weight-average molecular weights of ethylene polymers are described. The results for several typical unbranched Marlex polyethylenes are given covering the range 80,OOo-170,OOO. Depending on the polymer, the ratio weight-average to number-average varies from 10 to 16 for whole polymer. The z-average molecular weights estimated from the mean-square molecular radii are used to estimate as/aw ratios.

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“…Data at higher t c ,nperatures are limited ; however, measurements have been reported for c 1 6 and c 3 6 over the range 80-100°C. 26 Li et a1.22 found the equation…”

Section: Performance and Calibrationmentioning

confidence: 98%

A scattered‐light study of linear polyethylenes

Stacy

Arnett

1964

J. Polym. Sci. A Gen. Pap.

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Effect of molecular weight on the refractive increment of polyethylene and n‐alkanes

Wagner

Hoeve

1971

J. Polym. Sci. A‐2 Polym. Phys.

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synopsisAs in the case with other polymers previously reported, the values of the refractive index increment dn/dc of polyethylene and the n-alkanes change with molecular weight. Most of the variation may be understood by examination of the role of density in the Lorentz-Lorenz mixing equation ior specific refractivity, R12 = plR1 + P2R2 used to calculate dnldc. It rcay also be shown that as the absolute refractive index difference between solute and solvent becomes smaller, dnldc becomes more sensitive to density change of the solute.

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Pure Liquids: Extended References

Wohlfarth¹,

Wohlfarth²

Refractive Indices of Inorganic, Organometallic, and Organononmetallic Liquids, and Binary Liquid Mixtures

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Refractive Index of Liquids at Elevated Temperatures

Cited by 13 publications

References 13 publications

A scattered‐light study of linear polyethylenes

A scattered‐light study of linear polyethylenes

Effect of molecular weight on the refractive increment of polyethylene and n‐alkanes

Pure Liquids: Extended References

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