Authors
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Ghorai, S. ; Jalan, A. K. ; Roy, M. ; Das, A. ; De, D.
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Title
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Tuning of accelerator and curing system in devulcanized green natural rubber compounds
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Date
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01.08.2018
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Number
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55761
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Abstract
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These days sustainable ecosystem warrants cleaner, safer and easier mobility of resources in a production cycle. In a response of such call, in this present work, sulphur crosslinked natural rubber (NR) is successfully devulcanized using bis(3-triethoxysilyl propyl) tetrasulfide (TESPT) - a dual function disulfide chemical. It is observed that the mono-, di- and poly sulfide crosslinks, those determine the final performance of the composites, can be controlled by using various chemicals like N-cyclohexyl-benzothiazyl-sulphenamide (CBS), tetramethylthiuram disulfide (TMTD), 2-mercaptobenzothiazol (MBT) and N-tert-butyl-2-benzothiazyl-sulphonamide (TBBS). Subsequently different vulcanizing systems like conventional, efficient and semi efficient vulcanization systems were also studied. Furthermore, in the optimization of vulcanizing system, semi-EV showed the highest mechanical properties compared to that of the CV and EV system. The study shows a unique correlation between the crosslink density, (mono-, di- and polysulfide) and the mole % uptake of the solvent with time. It also shows the dependence of the fraction of immobilized polymer chain and the segmental dynamics of the composites on the crosslink density.
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Publisher
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Polymer Testing
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Wikidata
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Citation
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Polymer Testing 69 (2018) 133-145
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DOI
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https://doi.org/10.1016/j.polymertesting.2018.05.015
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Tags
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