Hybrid micro-emulsion of aniline in sodium dodecyl sulfate micellar solution and sulfonic acids: morphology, electrical, thermal and kinetic studies

Abstract The present work, aims to study the reaction kinetics parameters, morphology, electrical and thermal properties of aniline during its hybrid micro-emulsion polymerization in presence of 1.5 naphthalene sulfonic acid (1.5 NDSA) and dodecylbenzene sulfonic acid (DBSA) used alone or in combina...
Ausführliche Beschreibung

Abstract The present work, aims to study the reaction kinetics parameters, morphology, electrical and thermal properties of aniline during its hybrid micro-emulsion polymerization in presence of 1.5 naphthalene sulfonic acid (1.5 NDSA) and dodecylbenzene sulfonic acid (DBSA) used alone or in combination with sodium dodecyl sulfate (SDS) surfactant. FTIR, UV-visible, SEM, electrical conductivity and differential scanning calorimetry characterizations revealed that combinations of 1.5 NDSA/SDS and DBSA/SDS led to the appearance of nanometric morphology having a respective size around of (190–200) nm and, (60, 250, 300–550) nm. Electrical conductivity was found to be strongly dependent on the SDS added amount, where the maximum values of 80.4 S/$ cm^{2} $ has been obtained in the case of 1.5 NDSA/SDS system. A mechanism based on the micelles collision theory has been adopted to explain properties related to the nanometric size of polyaniline and the enhancement of their electrical conductivity. Activation energies according to methods of Chen and Ozawa has shown a good thermal stability of polyaniline samples. Ausführliche Beschreibung