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A simple technique for measuring the refractive index of polymer latexes at various wavelengths
Author(s) -
Devon Michael J.,
Rudin Alfred
Publication year - 1987
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.1987.070340202
Subject(s) - refractive index , absorbance , wavelength , polymer , materials science , optics , copolymer , optoelectronics , composite material , physics
The refractive index of emulsions of polymers and copolymers may be estimated from absorbance readings with a UV‐visible spectrophotometer. Other information needed is the weight‐average particle diameter, from other techniques such as gradient disc centrifugation. A simple computer program matches the refractive index parameter so that calculated and experimental absorbances are equal at the given wavelength. The wavelength dependence of the polymer refractive index is readily obtained.