Open AccessThe characterization of linear polyethylene SRM 1475. VII. Differential refractive index of polyethylene solutions
Author(s) -
Herman L. Wagner
Publication year - 1972
Publication title -
journal of research of the national bureau of standards. section a. physics and chemistry
Language(s) - English
Resource type - Journals
eISSN - 2376-5704
pISSN - 0022-4332
DOI - 10.6028/jres.076a.020
Subject(s) - gel permeation chromatography , polyethylene , solvent , polymer , refractive index , materials science , molecular mass , polymer chemistry , analytical chemistry (journal) , molar mass distribution , chromatography , chemistry , composite material , organic chemistry , optoelectronics , enzyme
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.