Extensional and complex viscosities of linear and branched polycarbonate blends

Hoon Park Jung, Chun Hyun Jae, Nyon Kim Woo, Ryong Kim Sung, Chan Ryu Seung

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Blends of the linear bisphenol-A polycarbonate (L-PC) and randomly branched bisphenol-A polycarbonate (Br-PC), prepared by co-rotating twin screw extrusion, were investigated using differential scanning calorimetry (DSC), sag resistance time tester, extensional rheometry, and advanced rheometric expansion system (ARES). From the DSC results, the glass transition temperature (Tg) of the L-PC/Br-PC blend was increased with the increase of Br-PC in the blend, and the blend showed a single Tg, which suggests a miscible blend. The sag resistance time of the L-PC/Br-PC blend was increased with the increase of Br-PC in the blends. From the results of rheological measurements of the L-PC/Br-PC blends, the extensional viscosity and the complex viscosity of the blends were found to increase with the increase of Br-PC in the blends. The increase of extensional viscosity and complex viscosity was related with the increase of sag resistance time with the Br-PC in the L-PC/Br-PC blends.

Original languageEnglish
Pages (from-to)135-139
Number of pages5
JournalMacromolecular Research
Volume10
Issue number3
DOIs
Publication statusPublished - 2002 Jun

Keywords

  • Extensional viscosity
  • Polycarbonate
  • Polymer blends

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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