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Cross-Linking of Rubber Matrices with Dicumyl Peroxide and Zinc Dimethacrylate. Part II: Effect of Peroxide Content

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Abstract

The work is focused on the investigation of the effect of dicumyl peroxide as curing agent and zinc dimethacrylate as co-agent on morphology, cross-linking and properties of rubber vulcanizates, in which the amount of zinc dimethacrylate was kept constant and amount of peroxide was varied. The cross-link density of vulcanizates increased proportionally to the amount of dicumyl peroxide. The highest dependence of cross-link density on peroxide content exhibited vulcanizates based on butadiene rubber and styrene-butadiene rubber due to their highest reactivity with free radicals. Relative low reactivity of radicals is characteristic of natural rubber, acrylonitrile-butadiene rubber, ethylene propylene diene monomer rubber, which supports higher conversion rate and in-situ polymerization of zinc dimethacrylate. Poor dispersion of zinc dimethacrylate in natural rubber has also negative effect on dimethacrylate conversion. High viscosity of ethylene propylene diene monomer rubber in contrast facilitates dispersion of zinc dimethacrylate in the rubber matrix and increases its conversion. Low relative reactivity of free radicals with acrylonitrile-butadiene rubber together with good dispersion of polar zinc dimethacrylate in polar rubber provides in-situ polymerization of zinc dimethacrylate.

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Funding

This work was supported by the Slovak Research and Development Agency under the contract No. APVV-16-0136 and APVV-19-0091.

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Authors and Affiliations

  1. Department of Plastics, Rubber and Fibres, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, 812 37, Bratislava, Slovakia

    Ján Kruželák, Zuzana Dugasová, Andrea Kvasničáková, Katarína Tomanová & Ivan Hudec

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  1. Ján Kruželák
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  2. Zuzana Dugasová
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  3. Andrea Kvasničáková
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  4. Katarína Tomanová
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  5. Ivan Hudec
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Correspondence to Ján Kruželák.

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Ján Kruželák, Dugasová, Z., Kvasničáková, A. et al. Cross-Linking of Rubber Matrices with Dicumyl Peroxide and Zinc Dimethacrylate. Part II: Effect of Peroxide Content. Polym. Sci. Ser. B 62, 717–723 (2020). https://doi.org/10.1134/S1560090420330052

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