Effect of 1-phenyl-2,4-dithiobiuret as secondary accelerator on cure characteristics and vulcanisate properties of natural rubber-styrene/butadiene rubber blends

Abi Santhosh Aprem, Kuruvilla Joseph, Sabu Thomas, Nektaria Marianthi Barkoula, J. Karger-Kocsis

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Blends of natural rubber and styrene/butadiene rubber have been cured using a new binary accelerator system containing 1-phenyl-2,4-dithobiuret (DTB). This new accelerator was synthesised and used in combination with sulphenamides such as dicyclohexyl benzothiazyl sulphenamide, tertiary butyl benzothiazole sulphenamide and morpholinothio benzothiazole sulphenamide. A significant reduction in cure time was observed with the addition of DTB. Network characterisation of the vulcanisates was carried out by the estimation of crosslink density and relative proportions of crosslinks. The mechanical properties of the vulcanisates improved upon addition of DTB. Dynamic mechanical analysis was carried out to study the effect of the new accelerator on entanglement density and modulus. Based on the processing behaviour, mechanical properties and chemical characterisation it was found that DTB could be effectively used as a secondary accelerator in the curing of NR-SBR blends.

Original languageEnglish
Pages (from-to)3-10
Number of pages8
JournalPlastics, Rubber and Composites
Volume32
Issue number1
DOIs
Publication statusPublished - Jan 1 2003

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemical Engineering(all)
  • Polymers and Plastics
  • Materials Chemistry

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