Pyrene-containing polystyrene segmented copolymer from nitroxide mediated polymerization and its application for the noncovalent functionalization of as-prepared multiwalled carbon nanotubes

Il Ho Choi, Min Park, Sang Soo Lee, Sung Chul Hong

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

This study reports simple and convenient procedures for the preparation of a novel surface modifier for multiwalled carbon nanotubes (CNTs) having uniform and controlled structure through controlled "living" free-radical polymerization technique. The technique afforded pyrene functionalized polystyrene block copolymers (PMAS) having controlled molecular weight, molecular weight distribution and length of each block for effective surface modification of CNTs. The modified CNTs exhibited much improved and stable dispersion in toluene. PMAS-CNT/polystyrene composites afforded clearer and more homogeneous films compared to those containing non-modified CNTs. The polystyrene films containing 2 wt% and 5 wt% of PMAS-CNTs showed improved AC conductivities of approximately 10-3 and 10-2 S/cm, respectively, which were 10 ∼ 106 times higher than those of films containing non-modified CNTs. These results demonstrated that PMAS effectively modified the surface of CNTs, which resulted in improved dispersion of CNTs in polystyrene matrices.

Original languageEnglish
Pages (from-to)3087-3095
Number of pages9
JournalEuropean Polymer Journal
Volume44
Issue number10
DOIs
Publication statusPublished - 2008 Oct 1

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Keywords

  • Block copolymer
  • Multiwalled carbon nanotube
  • Nitroxide mediated polymerization
  • Pyrene
  • Surface modifier

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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