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Effects of microballoons’ size and content in epoxy on compressive strength and modulus

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Abstract

Five slabs containing volume of microballoons ranging from 33.4 to 51.5% and all belonging to a size range of 65–100 μm were made. In order to study the effect of size range, another slab, but belonging to a broader range of 44–175 μm, was also cast, where in the microballoons’ content was 40.1% by volume. The first set of five slabs showed a decrease in compressive strength from 82.4 to 58 MPa as the microballoons’ content increased. A similar trend was observed for modulus values also. The work further showed that the samples from the narrower size range display a higher strength. Microscopic examinations revealed crushing of microballoons for the highest microballoons’ case while for the least microballoons bearing sample, deformation marks were visible on the epoxy matrix.

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Acknowledgements

The authors acknowledge the contributions of Messrs. Jagdish, Ravi Sekhar and Govind Raju of ADE who were involved in the preparation of the syntactic foams. The first (K) and second (RS) authors are grateful to Mr. Sasidhara for his help in conducting the compression tests. The first author (K) further would like to place on record the assistance rendered by the members of the Polymer Composites Laboratory in the Department of Metallurgy at various stages of the work.

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Authors and Affiliations

  1. Polymer Composites Laboratory, Centre for Advanced Studies, Department of Metallurgy, Indian Institute of Science, Bangalore, 560 012, India

    Kishore

  2. Fiber & Polymer Science, Materials Science and Engineering, College of Textiles, NC State University, 2401 Research Drive, Box 8301, Raleigh, NC, 27695, USA

    Ravi Shankar

  3. Aeronautical Development Establishment, New Thippasandra PO, Bangalore, 560 075, India

    S. Sankaran

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  1. Kishore
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  2. Ravi Shankar
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  3. S. Sankaran
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Correspondence to Kishore.

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Kishore, Shankar, R. & Sankaran, S. Effects of microballoons’ size and content in epoxy on compressive strength and modulus. J Mater Sci 41, 7459–7465 (2006). https://doi.org/10.1007/s10853-006-0801-5

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  • DOI: https://doi.org/10.1007/s10853-006-0801-5

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