Get access

Structure–property evaluation of trisilanolphenyl POSS®/polysulfone composites as a guide to POSS melt blending

Authors

  • Henry W. Milliman,

    1. Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7202
    Search for more papers by this author
  • Miguel Sánchez-Soto,

    1. Centre Catalá del Plástic, Universitat Politécnica de Catalunya, Colom 114, 08222 Terrassa, Spain
    Search for more papers by this author
  • Asier Arostegui,

    1. Mechanical and Industrial Production Department, Mondragon Unibertsitatea, Loramendi 4, 20500 Arrasate-Mondragon, Spain
    Search for more papers by this author
  • David A. Schiraldi

    Corresponding author
    1. Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7202
    • Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7202
    Search for more papers by this author

Abstract

A series of polysulfone/phenyl trisilanol POSS nanocomposites were produced by melt blending by twin screw batch mixing. These materials were then injection molded, and their thermal, mechanical, and morphological properties were tested. The tensile properties of polysulfone were moderately compromised by the addition of phenyl TPOSS, because of the formation of large (∼ 1 μm) voided POSS aggregates. These domains however did cause the improvement of the impact resistance of the composites as described by the mechanism of crack pinning and bowing. Flexural properties remained essentially unchanged, which is attributed to the formation of an aggregate free-skin layer, which formed in the injection molded parts. Thermal behavior of the composites also remained largely unchanged due to the lack of POSS-polymer interactions on the molecular/chain segment scale. Initially, it was hypothesized that a high degree of POSS-polymer interactions would be present in these composited based on examination of their chemical structures. This however, was not the case as phase separation was clearly present. This work highlights the need for a better understanding of the prediction of POSS-polymer interaction. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

Ancillary