Polymer
Polymer
5 years ago

Dielectric properties of nanocomposites based on cellulose nanocrystals (CNCs) and poly(styrene-co-2-ethyl hexylacrylate) copolymer

Dielectric properties of nanocomposites based on cellulose nanocrystals (CNCs) and poly(styrene-co-2-ethyl hexylacrylate) copolymer
In the present work, the dielectric properties of nanocomposites based on poly(styrene-Co-2-ethyl hexylacrylate) copolymer (StHA) and cellulose nanocrystals (CNCs) and γ-methacryloxypropyl triethoxysilane (MPS) as a coupling agent were investigated. Four relaxation processes were detected: the β relaxation, the α relaxation, the electrode polarization and the ionic conduction phenomenon. These two later were identified with the real part ε' and the imaginary part ε” of the dielectric permittivity slopes. Moreover, the electrode polarization was spotted using the first derivative of the real part of the dielectric permittivity. The activation energy E A for the β relaxation, the strength parameter D for the α relaxation and the relaxation strength Δε showed a threshold value of 4% in weight of CNC. Variations were explained with attractive and repulsive cellulose-cellulose and cellulose-copolymer interactions. The electrical study confirmed the dielectric results indicating the higher conductivity for the nanocomposite with 4%w.t of CNC. This work provided additional evidence of the formation of a rigid percolation network via hydrogen bonding for nanocomposites based on CNCs.

Publisher URL: www.sciencedirect.com/science

DOI: S0032386117307644

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.