Journal of Polymer Science Polymer Chemistry Edition · 1974 · 15 citations · 3 references
Natural SciencesChemical EngineeringChemistryOrganic ChemistryPolymer ChemistryPolymer MaterialsBiodegradationDecomposition AnalysisDegradation ProductsPolymer AnalysisPolymer DegradationThermogravimetric AnalysisDegradation AnalysisPolymer BiodegradationPolymer Degradation AnalysisPolymer Degradation MechanismsPolymer Thermal DegradationTemperature Effects On DecompositionThermal Degradation ProductsThermal Degradation Studies
Abstract The degradation of a series of polybenzimidazoles containing metylene groups in the chain was studied by TGA and MS. On heating the polymer derived from m ‐phenylenediacetic acid and 3,3′‐diaminobenzidine to about 560°C in argon, partial fast decomposition into a solid sublimate was observed. The sublimate consisted of a mixture of fractions derived from the breaking of the chain at the methylene bonds. These methylene groups can be preoxidized at 250°C to carbonyl groups, eliminating thereby this mode of decomposition. At temperature higher than 560°C, gaseous products similar to those of the corresponding all‐aromatic PBI are obtained.
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