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Empirical prediction method of intrinsic light scattering loss of transparent amorphous polymers
Author(s) -
Takezawa Yoshitaka,
Taketani Noriaki,
Tanno Seikichi,
Ohara Shuichi
Publication year - 1992
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.1992.070461115
Subject(s) - polymer , scattering , light scattering , refractive index , amorphous solid , materials science , static light scattering , isotropy , anisotropy , optics , thermodynamics , molecular physics , chemistry , physics , composite material , organic chemistry
We studied simple empirical equations to estimate the values of intrinsic light scattering loss α R of various polymers applicable for plastic optical fibers, especially for aromatic amorphous polymers. The α R is divided into two losses, that is, α iso and α aniso . Here, α iso means the isotropic scattering loss; α aniso , the anisotropic scattering loss. The α iso is mainly a function of refractive index, and the α aniso is a function of refractive index, density, and the number of benzene rings in the polymer repeating unit. Therefore, when the polymer density and the structure of its repeating unit are known, the values of α R can be estimated. We derived new empirical equations for predicting the values of each intrinsic light scattering loss, α iso and α aniso . The estimated values were approximately equal to the experimental ones. The values of α R of aromatic amorphous polymers were not so large inherently, and they were a few hundred decibels per kilometer at the highest. © 1992 John Wiley & Sons, Inc.