Insight into the molecular arrangement of high-density polyethylene polymer chains in blends of polystyrene/high-density polyethylene from differential scanning calorimetry and Raman techniques

Jayant Joshi, Richard Lehman, Gene Hall

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Polystyrene/high-density polyethylene (PS/HDPE) blends were synthesized by melt blending In a single screw extruder. Co-continuity measurements using solvent extraction and scanning electron (SEM) micrographs showed that co-continuity was obtained around 35% PS. Thermal analyses measurements revealed a reduction in crystallinity of the HDPE phase around the co-continuous composition. Raman analyses across the entire composition range of these blends showed an increase in the normalized Integral intensities of the 1128 cm -1 and 1061 cm -1 stretching vibrations of the HDPE molecules. The presence of all-trans HDPE chains that are not packed into an orthorhombic structure is used to explain the simultaneous occurrence of reduced crystallinity and Increased Intensity of all-trans HDPE stretch vibrations.

Original languageEnglish (US)
Pages (from-to)483-489
Number of pages7
JournalApplied Spectroscopy
Volume60
Issue number5
DOIs
StatePublished - May 1 2006

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Spectroscopy

Keywords

  • Blends
  • Polyethylene
  • Polystyrene
  • Raman

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