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Failure mechanisms in alloy of polyamide 6,6/polyphenylene oxide under severe conditions

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Abstract

Toughening mechanisms of a polyamide 6,6/polyphenylene oxide alloy containing an elastomer tested under a slow rate, an impact rate, and a low temperature have been investigated using various microscopy techniques. It is found that the toughening mechanisms of the alloy may change from crazing/shear yielding, to crack bridging/crazing, and to transparticle failure, depending on the testing conditions. Except for the low temperature high strain rate testing condition and in the plane stress region of the crack, the crazing mechanism has been observed in all the conditions we studied. When the testing rate is high, the shear yielding mechanism is suppressed; multiple crazing and particle bridging mechanisms appear to dominate.

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Author notes

  1. H. J. Sue

    Present address: B-1470 Texas Polymer Center, Dow Chemical USA, 77541, Freeport, TX, USA

Authors and Affiliations

  1. Macromolecular Research Center and Department of Materials Science and Engineering, University of Michigan, 48109, Ann Arbor, MI, USA

    H. J. Sue & A. F. Yee

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  1. H. J. Sue
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  2. A. F. Yee
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Sue, H.J., Yee, A.F. Failure mechanisms in alloy of polyamide 6,6/polyphenylene oxide under severe conditions. J Mater Sci 26, 3449–3456 (1991). https://doi.org/10.1007/BF00557130

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  • DOI: https://doi.org/10.1007/BF00557130

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