UV-Induced Electrical and Optical Changes in PVC Blends

被引：0

作者：

Sefik Suzer

Ozgur Birer

Adnan U. Sevil

Olgun Guven

机构：

[1] Bilkent University,

[2] Department of Chemistry,undefined

[3] TR-06533 Ankara,undefined

[4] Turkey,undefined

[5] Ankara Nuclear Research and Training Center,undefined

[6] Besevler,undefined

[7] TR-0600 Ankara,undefined

[8] Turkey,undefined

[9] Hacettepe University,undefined

[10] Department of Chemistry,undefined

[11] TR-06532 Ankara,undefined

[12] Turkey,undefined

来源：

Monatshefte für Chemie / Chemical Monthly | 2001年 / 132卷

关键词：

Keywords. Dehydrochlorination of PVC; Photochemistry; 2-Chloro-polyaniline; Optical litography; Photochemical sensitization.;

D O I：

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学科分类号：

摘要：

2-Chloro-polyaniline (2-Cl-PANI) in its non-conducting (emeraldine base, EB) form, prepared by a chemical route, was dissolved together with poly-(vinylchloride) (PVC) in THF for casting into thin (10–50 μm) films. Upon exposure to UV radiation, the electrical conductivity of these films increased by more than 4 orders of magnitude (from 10−6 to 10−2S/cm). This is attributed to the dehydrochlorination of PVC by exposure to energetic photons and subsequent doping of 2-Cl-PANI (i.e. conversion to emeraldine salt, ES) by in situ created HCl. The doped films could be returned to their undoped form by exposure to NH3 vapours. The UV-induced doping/NH3 undoping cycles could be repeated several times. Various spectroscopic techniques were employed to follow the changes in the films upon exposure to UV radiation. The same photo-dehydrochlorination process has also been utilized for optical and/or lithographic purposes by preparing PVC blends containing methyl violet, and acid-base indicator dye. The photo-dehydrochlorination can be effectively sensitized by incorporating hydroquinone into the PVC blends containing methyl violet.

引用

页码：185 / 192

页数：7