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Reflectivity of iridescent coextruded multilayered plastic films
Author(s) -
Radford J. A.,
Alfrey T.,
Schrenk W. J.
Publication year - 1973
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760130308
Subject(s) - iridescence , materials science , reflectivity , polystyrene , layer (electronics) , composite material , visible spectrum , refractive index , range (aeronautics) , optics , structural coloration , polymer , optoelectronics , photonic crystal , physics
Coextruded plastic films containing 231 alternating layers of polystyrene and polymethylmethacrylate have been made with individual layer thickness in the range of .06–0.1μ. Due to the difference in refractive indices these unique films can be made to reflect portions of the visible spectrum, yielding a highly iridescent appearance. Reflectivity measured on films of known layer thickness distribution correlated with values predicted from optical theory.