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Ionic liquid mediated synthesis of 4, 4'diamino azo benzene substituted aliphatic polyamides and thermal studies

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Title Ionic liquid mediated synthesis of 4, 4'diamino azo benzene substituted aliphatic polyamides and thermal studies
 
Creator B, Sridevi
M, Chitra
R, Nalini Suja
 
Subject Ionic liquid
Polyamides
Thermal studies
Green conditions
Viscosity
 
Description 729-736
Ionic liquids act as green solvents, which can replace the usual traditional solvents which pose both environmental and
biological hazard. In the present work 4,4'diamino azobenzene has been condensed with various aliphatic diacids such as
succinic acid, glutaric acid, adipic acid, azelaic acid, sebacic acid and Pimelic acid using imidazolium based ionic liquids in
the presence of triphenylphosphite(TPP). The resulting azopolyamides have been obtained in high yield with intrinsic
viscosity ranging from 0.56 - 0.81 dlg-1. This method is compared with modified Higashi’s method. The thermodynamic
parameters like G, H and S are calculated by approximate methods such as Freeman & Carroll, Coats & Red fern,
Doyle and Murray and White. The resulting polyamides prepared using green condition show increased thermal stability
when compared to polyamides prepared by modified Higashi’s method.
 
Date 2022-11-18T11:21:02Z
2022-11-18T11:21:02Z
2022-11
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscpr.res.in/handle/123456789/60842
https://doi.org/10.56042/ijct.v29i6.67387
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJCT Vol.29(6) [November 2022]