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Characterization of polypyrrole-thiophene capped poly(methyl methacrylate) via pyrolysis mass spectrometry

This article reports the direct pyrolysis mass spectrometry results on p-toluene sulfonate doped polypyrrole synthesized through the thiophene moities of thiophene-capped poly(methyl methacrylate), TPMMA. Pyrolysis data gave strong evidence for decomposition of the matrix polymer TPMMA during the electrochemical polymerization of pyrrole with a TPMMA coated anode. However, evolution of products diagnostic of TPMMA around 370°C, the temperature region of PPY degradation, and presence of fragments involving both thiophene and pyrrole units confirmed the growth of polypyrrole from the end groups of the matrix polymer while the main chain dissociates.