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DJPS

Diyala Journal For Pure Science

Scientific Refereed Journal Published By College of Science - University of Diyala

 

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djps.1402.388C

Diyala Journal For Pure Sciences DJPS

ISRA Impact Factor:3.715

P- ISSN:2222-8373, E-ISSN:2518-9255

Volume 14, Issue 2 , April . 2018

 

 

 Preparation and Characterization Some Monomers and Polymers Derived from Azo - Schiff Base Compounds and Studying Liquid Crystalline Properties, Electrical Conductivity and Dielectric Constant

 

Noor Sabah Al – Obaidi, Hanaa Kaain Salih , Ahmed N. Abd

 

Year: 2018, Volume: 14, Issue: 2

 

Pages: 221-234, DOI: http://dx.doi.org/10.24237/djps.1402.388C

 

Language: English

 

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Abstract


 

This  research  included  the  preparation  of  some  monomers and polymers by using (P-phenylene di amine) (A) as central unit (nucleus) for the preparation of these compounds in several steps following, the first step included the preparation of new derivatives of compounds (B) and (C), The second step included the preparation of three series of schiff bases (A1- A5), (B1-B5) and (C1-C5), The third step included polymerization of monomers that prepared in the 2nd step (A1 , A2 , B1 , B2 , C1 , C2 ), the prepared compounds diagnosed were by spectroscopy methods which includes infrared spectroscopy (IR) and some compound using nuclear magnetic resonance of the proton (1H-NMR), as well as the liquid crystalline state of the compounds prepared above studied was obtained compounds in (Nematic phase) and observed changes at different temperatures, as well as measure the real dielectric constant of these compounds, and the values ​​obtained are excellent as these compounds have high dielectric making it store materials for energy.

 

Key words: liquid crystal, Schiff base, Conductivity, Real dielectric constant

 

 

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