Effect of loading-rate on fracture micromechanism of methylmethacrylate-butadiene-styrene polymer blend

M. Todo, J. Takahashi, H. Watanabe, J. Nakamoto, K. Arakawa

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    Methylmethacrylate-butadiene-styrene (MBS) polymer blends having two different types of rubber particle distribution, monomodal and bimodal, were prepared, and their fracture properties and fracture mechanisms were investigated under quasi-static and impact loading. A fracture property, maximum J-integral Jmax, was evaluated at both loading-rates, and it was shown that Jmax values of the bimodal MBSs are much greater than that of the monomodal with small particles, and slightly better than that of the monomodal with large particles. Thick damage zones were observed in the crack-tip regions in the bimodal and monomodal with large particles, indicating larger energy dissipation during fracture initiation than in the monomodal with small particles in which damage zone is much thinner. TEM micrographs exhibit that extensive plastic deformation under quasi-static rate and multiple craze formation under impact loading rate are the primary toughening mechanisms in the bimodal MBS blends. By assessing both fracture properties and transparency, the bimodal blend with blend ratio: 2.5/7.5 (=140 nm/2.35 μm; total rubber particle content is 10 wt%) was proved to show the best performance as MBS polymer blend with satisfiable transparency and high fracture resistance.

    Original languageEnglish
    Pages (from-to)4824-4830
    Number of pages7
    Journalpolymer
    Volume47
    Issue number13
    DOIs
    Publication statusPublished - Jun 14 2006

    All Science Journal Classification (ASJC) codes

    • Organic Chemistry
    • Polymers and Plastics
    • Materials Chemistry

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