Peak intensity ratio ¼
A a,yJ À A a,0J
A a,0J
,
A b,yJ À A b,0J
A b,0J
(1)
where A a, yJ and A b, yJ are the absorbances of peaks a and b, respectively, under
y J/cm
2 LPUV irradiation, whereas A a, 0J and A b, 0J are the absorbances of peaks
a and b, respectively, without LPUV irradiation.
The peak intensity ratios of peaks a and b of the films prepared via different film
preparation protocols as a function of the LPUV irradiation time are shown in
Fig. 13a, b, respectively. The intensity of peak a for all 6FDA-TeMPD films
Fig. 13 Peak intensity ratio
for (a) peak a and (b) peak
b in the absorption spectra as a
function of LPUV exposure
from 0 to 10 J/cm
2
. Film
preparation conditions: THF
100
C (○), THF 250
C (●),
DMAc 100
C (□), DMAc
250
C (■). (Reprinted with
permission from
J. Photopolym. Sci. Technol.
25, 401. (Copyright (2012)
The Society of Photopolymer
Science and Technology))
508
S. Sato et al.