3 years ago

Alkyl side chain length dependent compatibility of poly(4-n-alkylstyrene)s and 1,4-rich polyisoprene blends

Alkyl side chain length dependent compatibility of poly(4-n-alkylstyrene)s and 1,4-rich polyisoprene blends
Satoru Matsushima, Atsushi Takano, Yushu Matsushita
We investigated the compatibility of blends of 1,4-rich polyisoprene (1,4-PI) and poly(4-n-alkylstyrene)s with six kinds of n-alkyl side groups, that is, methyl, ethyl, propyl, butyl, hexyl, and octyl focusing on carbon number of alkyl groups. Poly(4-methylstyrene)/1,4-PI blend was turned out to be immiscible at all temperature range adopted in this work and poly(4-ethylstyrene)/1,4-PI blend revealed UCST type phase behavior, while the others were found to be compatible. The phase diagrams of poly(4-ethylstyrene)/1,4-PI blends were obtained by optical microscopy, and the temperature dependence of the Flory-Huggins interaction parameter χ has been estimated to be χ = −0.036 + 24/T by applying lattice theory, where T is the absolute temperature. From this relationship χ value at room temperature (298 K) was calculated to be 0.045, the value is reasonably low for miscible polymers system. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2017, 55, 1791–1797 Compatibility of 1,4-rich polyisoprene and poly(4-n-alkylstyrene)s with six kinds of n-alkyl groups—methyl, ethyl, propyl, butyl, hexyl, and octyl groups—were investigated by differencial scanning calorimetry and optical microscopy (OM). Phase diagrams of the blends of poly(4-ethylstyrene) (n = 2) and 1,4-rich polyisoprene with three different molecular weight were obtained by OM, and the Flory-Huggins interaction parameter χ was estimated to be 0.045 at 298 K.

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

DOI: 10.1002/polb.24428

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.