Empirical prediction method of intrinsic light scattering loss of transparent amorphous polymers

摘要

AbstractWe studied simple empirical equations to estimate the values of intrinsic light scattering loss αRof various polymers applicable for plastic optical fibers, especially for aromatic amorphous polymers. The αRis divided into two losses, that is, αisoand αaniso. Here, αisomeans the isotropic scattering loss; αaniso, the anisotropic scattering loss. The αisois mainly a function of refractive index, and the αanisois 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 αRcan be estimated. We derived new empirical equations for predicting the values of each intrinsic light scattering loss, αisoand αaniso. The estimated values were approximately equal to the experimental ones. The values of αRof aromatic amorphous polymers were not so large inherently, and they were a few hundred decibels per kilometer at the highest. © 1992 John Wil