Abstract
NMR and EPR methods were used to analyse structural and kinetic processes of vulcanisation of industrial liquid thiokols with manganese dioxide (MnO2). We have established how the different compositions of batches of industrial MnO2 affect the cure rate and density of chains forming molecular nets within the sealant. We have shown influence of structure and localisation of Mn4+ ions (as part of MnO2) on the mechanism of liquid thiokols vulcanisation, which depending on vulcanisation conditions could go through adsorption-desorption processes of thiokol cure, or through raercaptide links formation. The latter then oxidised by the excess of (MnO2 or eliminated under influence of sulphur of with thermal vulcanisation.
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