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Mechanical and Viscoelastic Properties of Natural Rubber/ Reclaimed Rubber Blends

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Summary

Addition of reclaimed rubber affected mechanical properties, processing and rheological behavior of rubber compounds. Sulfur left in reclaimed rubber affected curing process of NR/reclaimed rubber blends. The most suitable curing was achieved with ratio 1:1 of natural rubber and reclaimed rubber which was used in this study. Presence of fillers in reclaimed rubber, non-homogeneity of phases, non-uniform filler dispersion and lower molecular weight of reclaimed rubber due to chain scission in reclaiming process caused diminishing of mechanical properties of NR/reclaimed blends, particularly dynamic-based properties. Reclaimed rubber also affected rheological behavior of natural rubber. In a strain sweep viscoelastic test, it could be observed that NR/reclaimed blend show more non-linear viscoelastic and viscous behavior than predicted one which was due to non-homogenized phases. This non-homogenized morphology was detected using scanning electron microscopy (SEM) and the blend with ratio 1:1 had the most homogenized morphology.

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Authors and Affiliations

  1. Rubber Processing and Engineering Group, Polymer Processing Faculty, Iran Polymer and Petrochemical Institute (IPPI), P.O. Box: 14965/115, Tehran, Iran

    T. Darestani Farahani, G.R. Bakhshandeh & M. Abtahi

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  1. T. Darestani Farahani
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  2. G.R. Bakhshandeh
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  3. M. Abtahi
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Correspondence to T. Darestani Farahani.

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Darestani Farahani, T., Bakhshandeh, G. & Abtahi, M. Mechanical and Viscoelastic Properties of Natural Rubber/ Reclaimed Rubber Blends. Polym. Bull. 56, 495–505 (2006). https://doi.org/10.1007/s00289-006-0508-4

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  • DOI: https://doi.org/10.1007/s00289-006-0508-4

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