Effects of poly[styrene-b-(ethylene-co-butylene)-b-styrene] on the charge distributions of low-density polyethylene/polystyrene blends

Tae Young Kim, Dong Myung Kim, Won Jung Kim, Tae Hee Lee, Kwang S. Suh

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The effect of the triblock copolymer poly[styrene-b-(ethylene-co-butylene)b-styrene] (SEBS) on the formation of the space charge of immiscible low-density polyethylene (LDPE)/polystyrene (PS) blends was investigated. Blends of 70/30 (wt %) LDPE/PS were prepared through melt blending in an internal mixer at a blend temperature of 220 °C. The amount of charge that accumulated in the 70% LDPE/30% PS blends decreased when the SEBS content increased up to 10 wt %. For compatibilized and uncompatibilized blends, no significant change in the degree of crystallinity of LDPE in the blends was observed, and so the effect of crystallization on the space charge distribution could be excluded. Morphological observations showed that the addition of SEBS resulted in a domain size reduction of the dispersed PS phase and better interfacial adhesion between the LDPE and PS phases. The location of SEBS at a domain interface enabled charges to migrate from one phase to the other via the domain interface and, therefore, resulted in a significant decrease in the amount of space charge for the LDPE/PS blends with SEBS.

Original languageEnglish
Pages (from-to)2813-2820
Number of pages8
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume42
Issue number15
DOIs
Publication statusPublished - 2004 Aug 1

Keywords

  • Charge migration
  • Domain interface
  • Low-density polyethylene (ldpe)
  • Miscibility
  • Poly[styrene-b-(ethyleneco-butylene)-b-styrene] (sebs)
  • Polystyrene (ps)
  • Space charge

ASJC Scopus subject areas

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

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