Novel exfoliated graphite nanoplates/syndiotactic polystyrene composites prepared by solution-blending

Fu An He, Hui Jun Wu, Xin Li Yang, Kwok Ho Lam, Jin Tu Fan, Lai Wa Helen Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)

Abstract

Novel exfoliated graphite nanoplates (xGNPs)/syndiotactic polystyrene (sPS) composites were prepared by a simple and effective solution-blending method. The uniform dispersion of xGNPs in sPS matrix was confirmed by scanning electron microscopy. The effect of xGNPs on sPS crystallization behavior was investigated by wide angle X-ray diffraction and differential scanning calorimetry. It was found that the existence of xGNPs increased the crystallization ability of sPS and facilitated the formation of the β phase crystalline structure. By adding 10 wt.% of xGNPs, the increase in the onset degradation temperature of the xGNPs/sPS composite could reach 12°C. The AC electrical conductivity at 1000 Hz increased from 3.8 × 10-10S/m for neat sPS to 2.25 × 10-4S/m for xGNPs/sPS composite containing 2.93 vol.% of xGNPs. Moreover, the thermal conductivity of the xGNPs/sPS composite containing 8.26 vol.% has been significantly improved from 0.21 to 1.63 W/m·K when compared with that of pure sPS.
Original languageEnglish
Pages (from-to)45-53
Number of pages9
JournalPolymer Testing
Volume42
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • AC electrical conductivity
  • Crystallization behavior
  • Thermal conductivity
  • Thermal stability
  • xGNPs/sPS composites

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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