Preparation of microporous films from immiscible blends via melt processing

C. Chandavasu, M. Xanthos, K. K. Sirkar, C. G. Gogos

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Microporous films from immiscible blends were produced via melt processing and post-step treatments. Polystyrene (PS)/polypropylene (PP) and poly(ethylene terephthalate) (PET)/polypropylene blend systems with different viscosity ratios were studied. The blends were first compounded in a co-rotating twin-screw extruder and subsequently extruded through a sheet die to obtain the precursor films. These were uniaxially or biaxially drawn (100-400%) with respect to the original dimension to induce microporous structure and post treated at elevated temperature to maintain the porous structure which consisted of uniform microcracks in the order of a few hundred nanometers. The fabrication process here is shown to be a promising technique for producing microporous films that can be used for liquid and gas separations.

Original languageEnglish (US)
Pages (from-to)288-299
Number of pages12
JournalJournal of Plastic Film and Sheeting
Volume16
Issue number4
DOIs
StatePublished - Oct 2000

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

Keywords

  • Immiscible blends
  • Melt processing
  • Membranes
  • Methanol permeability
  • Microporous film
  • PET
  • PP
  • PS

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