Thermal stability of electrochemically prepared polythiophene and polypyrrole

Abstract

The degradation behaviour of electrochemically prepared polythiophene and polypyrrole has been studied by thermal gravimetric analysis technique. Studies on both the polymers show that they are more stable than polyacetylene but still undergo degradation reactions which involve two steps, viz. loss of dopant and then degradation of polymer backbone. The general features of degradation mechanisms are discussed.

One‐Step Fabrication of Superhydrophobic/Superoleophilic Electrodeposited Polythiophene for Oil and Water Separation

“…The initial weight loss below 300 °C is brought about by the evaporation of the absorbed moisture, and the degradation of the dopant and unreacted terthiophene . The degradation of the dopant, also known as thermal dedoping process, happens without any loss of conjugation as reported previously by Mohammad et al It can also be estimated based on the remaining weight at 300 °C that the electropolymerized polythiophene contains about 20 wt% dopant, which is consistent to what has been reported previously by Cao et al Succeeding weight losses are due to the oxidative degradation of the polythiophene backbone. It has been reported that the oxidative degradation of polythiophene involves substitution, addition, and chain scission that gives off product with OH and CO groups …”

Dirac Cones in two-dimensional conjugated polymer networks

“…Test models of 1D-PTh found chain breakdown between 900 and 1,000 K, matching experimental thermogravimetric analysis (TGA) measurements of 973 ± 100 K (ref. 66).…”

Pyrolysis Mass Spectrometry Analysis of BF4−Doped Polythiophene

“…[13,14] Chromatograms recorded during the pyrolysis performed using 3588C, 4458C, 5908C, and 9208C pyrofoils were quite identical. Unfortunately, the separation of the gaseous low molecular weight products was not possible due to the column limitations.…”