In-Plane Birefringence of Cellulose Esters

The normalized orientation birefringence is shown in Fig. 9.7. It is demonstrated that the wavelength dependence of the normalized orientation birefringence becomes weak as the bu- 

In the case of cellulose esters, Eq. 9.9 is predictable because which is the coefficient having the relation with the wavelength of 

The wavelength dispersion of the out-of-plane birefringence of the samples is shown in Fig. 9.9. The solution-cast films, including CTA (butyryl content is zero], show positive birefringence although CTA shows negative In-plane birefringence. The out-of-plane 

ATR spectra of CTA films prepared by the solution-cast method with different evaporation rates. 

4 Optical Properties of Solution-Cast Cellulose Triacetate Films 

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