The optical properties of polymethylmethacrylate polymer dispersed liquid crystals

被引：36

作者：

Al-Ani, SKJ

Al-Ramadin, Y

Ahmad, MS ^{[1
]}

Zihlif, AM

Volpe, M

Malineonico, M

Martuscelli, E

Ragosta, G

机构：

[1] Univ Jordan, Dept Phys, Amman, Jordan

[2] CNR, Inst Res & Technol Plast Mat, I-80125 Naples, Italy

来源：

POLYMER TESTING | 1999年 / 18卷 / 08期

关键词：

D O I：

10.1016/S0142-9418(98)00059-2

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of the addition of polymer liquid crystals as dispersed molecules to polymethylmethacrylate (PMMA) on the optical properties in the UV-visible and near infrared regions is investigated. From transmission, absorption and reflection spectra the absorption coefficient alpha(omega) and refractive index (n) at angular frequency of radiation (omega) have been calculated at room temperature. The values of the optical band gap (E-opt) have been obtained from the direct allowed transitions in k-space. The width of the tails of localized states in the band gap (Delta E) was evaluated from Urbach edges. Both the parameters (E-opt) and (Delta E) vary with the mixing ratio of dispersed liquid crystals. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：611 / 619

页数：9

共 24 条

[1] DETERMINATION OF THE OPTICAL GAP OF AMORPHOUS MATERIALS [J].