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POSSⓇ in Tight Places

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Abstract

The nature of polymer/POSS interactions and associated thermo-mechanical properties are discussed, and found to be consistent with small-molecule interactions associated with POSS, rather than a bottom-up self-assembly or any other method of classical reinforcement. Hansen solubility parameters are shown to accurately predict polymer/POSS combinations which are capable of successful interactions; such interactions are necessary, but insufficient for polymer property enhancement, since in many cases compatibility simply leads to plasticization by POSS. In the presence of stong additive/polymer interactions, such as via hydrogen bonding and/or π- π stacking, moduli, strength and glass transitions can all be increased, but only up to the solubility limit for the POSS in the polymer, which typically is reached at approximately 2.5-3 wt % POSS. Beyond the solubility limit, phase separation and rapid degradation of properties is observed.

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Authors and Affiliations

  1. Department of Macromolecular Science & Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA

    Henry W. Milliman, Matthew M. Herbert & David A. Schiraldi

Authors
  1. Henry W. Milliman
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  2. Matthew M. Herbert
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  3. David A. Schiraldi
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Correspondence to David A. Schiraldi.

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Milliman, H.W., Herbert, M.M. & Schiraldi, D.A. POSSⓇ in Tight Places. Silicon 8, 57–63 (2016). https://doi.org/10.1007/s12633-015-9343-2

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  • DOI: https://doi.org/10.1007/s12633-015-9343-2

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