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The Characterization of Linear Polyethylene SRM 1475. VII. Differential Refractive Index of Polyethylene Solutions
1Institute for Materials Research, National Bureau of Standards, Washington, D.C. 20234.
Abstract:
The value of dn/dc for polyethylene in 1-chloronaphthalene at 135 °C, required for the determination of molecular weight by light scattering, was found to vary with molecular weight. Similar changes were found in 1,2,4-trichlorobenzene, the gel permeation chromatograph solvent. The absolute value of dn/dc decreases by about 2 percent as the polymer molecular weight increases from 12,000 to 110,000.
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