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Determination of polyolefin film properties from refractive index measurements
Author(s) -
Schael George W.
Publication year - 1964
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1964.070080617
Subject(s) - refractive index , polyolefin , birefringence , crystallinity , materials science , step index profile , refraction , index (typography) , optical density , refractometer , optics , normalized frequency (unit) , composite material , analytical chemistry (journal) , optoelectronics , chemistry , physics , chromatography , fiber optic sensor , phase locked loop , layer (electronics) , frequency synthesizer , world wide web , computer science , phase noise , graded index fiber , fiber
A technique is described for determining the density of polyolefin film from refractive index measurements. The procedure involves the measurement of the refractive indexes ( n x , n y , and n z ) along the three major axes of a film sample and conversion of the arithmetic average refractive index to a density value. The refractive index data are also used to calculate the per cent crystallinity and birefringence in the film.