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Synthesis Of Polyaniline Substituted Dyes And The Study Of Their Electrical Conductivity


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Authors : ; ; ; ; ; ; ;

Page : 362-368

Keywords : Polyaniline; polyaniline substituted azo dyes; electrical conductivity;

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Polyaniline substituted azo dyes were synthesized from polyaniline obtained by oxidative polymerization of aniline and different azo dyes obtained from 2-aminothiophene intermediates. Four different polyaniline substituted dyes were synthesized and there molecular weight ranges from 58044-58128gmol. The melting point was observed to span from 286C-319C. The FT-IR bands of polyaniline substituted dyes showed absorption peaks in the range 3213.0-3242.8cm-1 due to the presence of an amino group the benzenoid and quinoid rings for all the polyaniline substituted dyes showed in the range 1461-1487cm-1 and 1543-1595cm-1 respectively while the carbon nitrogen single bond C-N absorption were found in the range 1263.6-1285cm-1. The electrical conductivity measurements were obtained by employing a standard process using a programmable LCR meter at a frequency range of 200-100000Hz and the result was determined for polyaniline to be 5.957 x 10-3 S m-1. Thus electrical conductivity of synthesized dyes were observed to be within the range of 10-7-10-8 S m-1 while polyaniline substituted dyes lies within the range of 10-2-10-4 S m-1. The electrical conductivity of the dyes and polyanaline substituted dyes lies within the range of electrical conductivity for semiconductor which is between 10 12 102 S m-1.

Last modified: 2018-06-03 19:54:05