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Micromechanism of failure of thermoplastic rubber

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Abstract

The fracture surface morphology of various thermoplastic rubber and rubber vulcanizates based on natural rubber (NR), ethylene propylene diene rubber (EPDM), nitrile rubber (NBR), polyethylene (PE) and polypropylene (PP), namely NR-PE, NR-PP, EPDM-PE, EPDM-PP and NBR-PP, has been studied over a range of blend ratios, levels of interaction, rates, temperatures and modes of testing. The fracture surface changes with changes in blend ratio. Incorporation of a third component like EPDM or chlorinated polyethylene (CPE) to a certain percentage does not change the fracture morphology. Sulphur curing in the NR-PE blend generates a ductile matrix like rubber whereas large fissures are observed for peroxide-cured systems. Modification of both rubber and plastic also changes the surface morphology. The samples tested at various temperatures, rates and modes show similar features on the fracture surface.

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Authors and Affiliations

  1. Rubber Technology Centre, Indian Institute of Technology, 721 302, Kharagpur, India

    Namita Roy Choudhury & Anil K. Bhowmick

Authors
  1. Namita Roy Choudhury
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  2. Anil K. Bhowmick
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Roy Choudhury, N., Bhowmick, A.K. Micromechanism of failure of thermoplastic rubber. J Mater Sci 25, 2985–2989 (1990). https://doi.org/10.1007/BF00584915

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  • DOI: https://doi.org/10.1007/BF00584915

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