Thermal oxidative stability of polyanilines. (January 2020)

• Record Type: Journal Article
• Authors: Trân, Thanh Hiền; Debarnot, Dominique; Richaud, Emmanuel
• Is Part Of: Polymer testing. Volume 81(2020)
• Publication Date: 2020-01
• Subjects: Polyaniline -- Cold plasma -- Thermal stability -- Infra-red spectroscopy -- Water contact angle; Polymers -- Testing -- Periodicals; Polymères -- Tests -- Périodiques; 620.1920287
• DOI: 10.1016/j.polymertesting.2019.106187
• Languages: English
• ISSNs: 0142-9418

Abstract

Abstract: This paper deals with thermal ageing of polyaniline obtained from plasma or chemical ways. FTIR analyses suggest the formation of stable carbonyl compounds in both cases. The plasma polyaniline degrades clearly faster than its chemical analog which is discussed from structural considerations. The consequences of thermal ageing on the surface properties monitored by Water Contact Angles (WCA) are also considered and explained as the overlap of an "oxidation" component that decreases WCA and a "crosslinking" component (only observed in plasma polyaniline) responsible for the WCA increase. Highlights: Degradation study of polyaniline synthesized either by plasma or conventional methods. Changes in chemical structure (FTIR) and surface properties (Water Contact Angle). Faster degradation of plasma polyaniline compared to its conventional analog. Ageing associated to crosslinking and oxidation for plasma polyaniline and only to oxidation for the chemical polymer.