Mechanical properties of polymer-blend nanocomposites with organoclays: Polystyrene/ABS and high impact polystyrene/ABS

Biqiong Chen, Julian R G Evans

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Thirty-three polystyrene (PS)/acrylonitrile-butadiene-styrene (ABS) and high impact PS/ABS polymer blends with organoclay and copolymer additives were prepared by melt processing using different mixing sequences in order to test the putative capability of clay to perform a compatibilizing role in polymer blends. In general, the addition of clay increased the tensile modulus and had little effect on tensile strength. For the blends studied in this work, the addition of organoclays caused a catastrophic reduction in impact strength, a critical property for commercial viability. The polymer-blend nanocomposites adopted a structure similar to that for ABS/clay nanocomposites as determined by X-ray diffraction and transmission electron microscopy. It is suggested that clay reinforcement inhibits energy absorption by craze formation and shear yielding at high strain rates. Simultaneous mixing of the three components provided nanocomposites with superior elongation and energy to failure compared to sequential mixing. The clay pre-treated with a benzyl-containing surfactant gave the best overall properties among the various organoclays tested and of the two clay contents studied 4 wt % was preferred over 8 wt % addition.

Original languageEnglish
Pages (from-to)443-454
Number of pages12
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume49
Issue number6
DOIs
Publication statusPublished - 15 Mar 2011
Externally publishedYes

Keywords

  • clay
  • compatibilization
  • polymer blend

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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