3 years ago

Interfacial influence on mechanical properties of polypropylene/polypropylene-grafted silica nanocomposites

Interfacial influence on mechanical properties of polypropylene/polypropylene-grafted silica nanocomposites
Wei Wang, Jingshen Wu
Three types of polypropylene-grafted silica (PGS-2 K, PGS-8 K and PGS-30 K) with different grafting chain lengths were prepared. After melt-blending PGS with polypropylene (PP), we studied the PP/PGS interface properties and the influence of PP/PGS interfaces on mechanical properties of nanocomposites. The strong matrix/particle interface was observed in PP/PGS-30 K nanocomposites with 5 wt % particle loading as evidenced by 2.5 °C increased glass transition temperature (Tg) compared with neat PP, whereas the weak matrix/particle interface was observed in PP/PGS-2 K nanocomposites with decreased Tg. The variations in the matrix/particle interfacial strength lead to a transition in the yield stress of nanocomposites. Compared with the unfilled PP, the yield stress of the PP/PGS-2 K nanocomposites is decreased by 0.7 MPa, and the yield stress of the PP/PGS-30 K nanocomposites is enhanced by 1.4 MPa. In addition, benefiting from good dispersion, the PP/PGS-masterbatch nanocomposites with a strong matrix/particle interface not only exhibit increased Young's modulus and yield stress, but also the strain at break remains in line with the unfilled PP, which is in contrast to the conventional wisdom that the gain in modulus and strength must be at the expense of the decreased break strain. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 135, 45887.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/app.45887

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.