Refractive index of corona-treated polypropylene films

被引：9
|
作者：
Yovcheva, T. [1 ]
Babeva, Tz [2 ]
Nikolova, K. [3 ]
Mekishev, G. [1 ]
机构：
[1] Paisij Hilendarski Univ Plovdiv, Dept Expt Phys, BG-4000 Plovdiv, Bulgaria
[2] Bulgarian Acad Sci, Cent Lab Photoproc, BG-1113 Sofia, Bulgaria
[3] Univ Food Technol, BG-4002 Plovdiv, Bulgaria
来源：
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS | 2008年 / 10卷 / 05期
关键词：
corona discharge; poly(propylene); refractive index; thin films; transmittance spectra;
D O I：
10.1088/1464-4258/10/5/055008
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The samples under investigation are 20 mu m thick isotactic polypropylene films corona treated at different corona polarities and grid voltages in a three-electrode system. In order to control the results of the applied treatment a combination of two refractive index (RI) measuring techniques (laser refractometry and spectrophotometry) is used to study RI dispersion in the spectral range 400-1000 nm. It is found that the surface RI was lower than the volume RI. After a corona treatment both surface and volume RI increase. The changes of the volume RI as compared to surface values are more influenced by the corona treatment conditions: the greater the grid potential, the bigger the volume RI.
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页数：4
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