Get access

POSS Core star-shape molecular hybrid materials: Effect of the chain length and POSS content on dielectric properties

Authors

  • Fuyou Ke,

    1. Department of Polymer Science and Engineering, College of Material Science and Engineering, and State Key Laboratory of Chemical Fibers and Polymeric Materials, Donghua University, Shanghai 201620, China
    Search for more papers by this author
  • Chao Zhang,

    1. Department of Polymer Science and Engineering, College of Material Science and Engineering, and State Key Laboratory of Chemical Fibers and Polymeric Materials, Donghua University, Shanghai 201620, China
    Search for more papers by this author
  • Shanyi Guang,

    1. Department of Basic Chemistry, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
    Search for more papers by this author
  • Hongyao Xu

    Corresponding author
    1. Department of Polymer Science and Engineering, College of Material Science and Engineering, and State Key Laboratory of Chemical Fibers and Polymeric Materials, Donghua University, Shanghai 201620, China
    • Department of Polymer Science and Engineering, College of Material Science and Engineering, and State Key Laboratory of Chemical Fibers and Polymeric Materials, Donghua University, Shanghai 201620, China
    Search for more papers by this author

Abstract

A series of inorganic–organic molecular hybrids, poly(styrene-co-octavinyl-polyhedral oligomeric silsesquioxane)s (PS-POSSs), were synthesized, and their structures and properties were characterized by FTIR, 1H-NMR, 29Si-NMR, XRD, optical microscopy (OM), and atomic force microscopy (AFM). The chemical incorporation of POSS into polymer matrixes achieves uniform dispersion and makes the resultant hybrids display good film formability. The relationship between molecular structure of these hybrids and their dielectric constants and formation mechanism of low dielectric constant were investigated. The low dielectric constant of the hybrids mainly originates from the increase of free volume, involving the free volume of intrinsic porosity from POSS and an increase in the free volume owing to steric hindrance of bulky POSS. The latter plays a dominant role to increase the free volume and formation of low dielectric constant. Simultaneously, the polymer arm-length has an important influence on the dielectric constant of the star-type hybrids. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

Ancillary