Optical and electrical properties of a new polymer

✍ Scribed by Lamies Shahada; M. E. Kassem; H. I. Abdelkader; H. M. Hassan

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 158 KB
• Volume: 65
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970829)65:9<1653::aid-app1>3.0.co;2-e

✦ Synopsis

Thin film of poly(5-isopropylidenecyclo-1,4-vinylene-2,3-dicarboxylicacidamide-s-methyl hydrazinecarbodithioate) (II) (Scheme 1 ) of 5 mm thickness was prepared. The dielectric properties of the prepared sample were studied as a function of frequency and temperature, and the results were analyzed by the Cole-Cole method. The optical permittivity and the dc-conductivity have been deduced, and the activation energy has been calculated and found to be 0.023 eV. Also, a detailed study of optical absorption is presented. The optical absorption spectra were measured in the wavelength range from 200 -600 nm. The calculated absorption coefficient, absorption index, and determined values of energy gaps ( E d opt , E i opt and DE) are presented. The results indicate that both mechanisms of direct and indirect transitions exist.