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Influence of free volume on the mechanical properties of Epoxy/poly (methylmethacrylate) blends

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Abstract

Positron lifetime measurements have been performed to investigate the free volume dependence of the mechanical properties of Epoxy/poly methyl methacrylate (PMMA) blends of varying composition of PMMA (2.5, 5, 7.5, 10, 12.5, 15, and 17.5 wt%). The mechanical properties of the blends have been evaluated according to the (ASTM) standard. The positron results indicate that the mechanical properties like tensile strength and surface hardness have a significant dependence on the free volume of the blends. It is also found that the blends of the present study show positive deviation from the familiar linear additivity rule suggesting the immiscible nature of the blends. Further, up to 5-wt% of PMMA in the blend, an increase in relative fractional free volume correlates well with a decrease of tensile strength.

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Authors and Affiliations

  1. Department of Studies in Physics, University of Mysore, Manasagangotri, Mysore, 570 006, India

    H. B. Ravikumar, C. Ranganathaiah & G. N. Kumaraswamy

  2. Department of Polymer Science and Technology, S.J. College of Engineering, Mysore, 570 006, India

    Siddaramaiah

Authors
  1. H. B. Ravikumar
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  2. C. Ranganathaiah
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  3. G. N. Kumaraswamy
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  4. Siddaramaiah
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Correspondence to C. Ranganathaiah.

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Ravikumar, H.B., Ranganathaiah, C., Kumaraswamy, G.N. et al. Influence of free volume on the mechanical properties of Epoxy/poly (methylmethacrylate) blends. J Mater Sci 40, 6523–6527 (2005). https://doi.org/10.1007/s10853-005-1707-3

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  • DOI: https://doi.org/10.1007/s10853-005-1707-3

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