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Effect of the modification of silica on thermal properties and flammability of cross-linked butadiene-acrylonitrile rubbers

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Abstract

The paper presents the results of testing the thermal stability and flammability of butadiene-acrylonitrile rubber vulcanizates with different contents of combined acrylonitrile: Perbunan NT 1845 and Perbunan NT 3945 from Bayer, containing unmodified and bromine- or iodine-modified silica. The test results were obtained with the use of a derivatograph, measurements of flammability by the method of oxygen index, in air and also with the use of a cone calorimeter. The effect of the modification on the zeta potential was also examined.

A considerable reduction in the flammability of nitrile rubber vulcanizates filled with silica can be obtained by the modification of filler with bromine or iodine. All the vulcanizates containing modified silica are self-extinguishing. An appropriate filling of NBR 39 vulcanizates with bromine-modified silica makes it possible to obtain non-flammable polymeric materials. They neither ignite nor glow under the action of a flame source for 30 s.

The findings can be a rational basis for the synthesis of modified silica that can act as active filler and effective flame-retardant agent at the same time.

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Authors and Affiliations

  1. Faculty of Chemistry, Institute of Polymer and Dye Technology, Technical University of Łódź, Łódź, Poland

    G. Janowska & P. Rybiński

  2. Faculty of Textile Engineering and Marketing, Department of Physical Chemistry of Polymers, Technical University of Łódź, Łódź, Poland

    R. Jantas

Authors
  1. G. Janowska
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  2. P. Rybiński
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  3. R. Jantas
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Correspondence to G. Janowska.

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Janowska, G., Rybiński, P. & Jantas, R. Effect of the modification of silica on thermal properties and flammability of cross-linked butadiene-acrylonitrile rubbers. J Therm Anal Calorim 87, 511–517 (2007). https://doi.org/10.1007/s10973-006-7796-7

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  • DOI: https://doi.org/10.1007/s10973-006-7796-7

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