Adhesion of RFL-treated short-cut Aramid Fibres to Sulphur and Perioxide-cured Elastomers

S. Sadatshirazi, Auke Talma, Jacobus W.M. Noordermeer

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The thermal history and in particular the mixing dump temperature is a parameter of paramount importance in mixing rubber and silica with a silane coupling agent in order to achieve proper silanization of silica and to avoid premature scorch reactions. In this work, the influence of mixing dump temperature on the performance of silica reinforced Natural Rubber (NR) is investigated. The investigation also includes the effect of non-rubber constituents, primarily proteins in NR, by using deproteinized Natural Rubber (DPNR) and synthetic polyisoprene (IR). The vulcanization properties and rubber-to-filler interactions of silica reinforced NR in presence and absence of a silane coupling agent are highlighted. With increasing mixing dump temperature, the silanization reaction between silica and silane coupling agent proceeds further. At sufficiently high dump temperature, filler-filler interactions in the NR-silica compounds are reduced and silica-rubber interaction improved as evidenced by a drop in the Payne effect and increment in chemically bound rubber. It is demonstrated that NR and IR compounds mixed till above the optimum dump temperature exhibit cure reversion and reduction in tensile properties. On the other hand, DPNR-silica vulcanizates show slightly more constant physical properties.
Original languageEnglish
Title of host publication10th Fall Rubber Colloquium 2012, Kautschuk Herbst Kolloquium, November 7th - 9th, 2012
Place of PublicationHannover
PublisherDeutsches Institut für Kautschuktechnologie
Publication statusPublished - 2012
Event10th Fall Rubber Colloquium 2012: Kautschuk-Herbst-Kolloquium - Radisson Blu Hotel, Hannover, Germany
Duration: 7 Nov 20129 Nov 2012
Conference number: 10

Publication series

PublisherDeutsches Institut für Kautschuktechnologie


Conference10th Fall Rubber Colloquium 2012
Abbreviated titleKHK


  • METIS-296624
  • IR-86220


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