Material Research Innovations

, Volume 4, Issue 5, pp 301–305

Orientation of pores in microporous polyethylene films as determined by polarized absorption spectroscopy

Authors

  • I. Grabchev
    • Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria e-mail: itmoneva@bas.bg
  • I. Moneva
    • Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria e-mail: itmoneva@bas.bg
  • A. Kozlov
    • Institute of Highmolecular Compounds, Russian Academy of Sciences, Bolshoy Prospect 31, 199004 St. Petersburg, Russia
  • G. Elyashevich
    • Institute of Highmolecular Compounds, Russian Academy of Sciences, Bolshoy Prospect 31, 199004 St. Petersburg, Russia
Original Article

DOI: 10.1007/s100190000113

Cite this article as:
Grabchev, I., Moneva, I., Kozlov, A. et al. Mat Res Innovat (2001) 4: 301. doi:10.1007/s100190000113

Abstract 

Microporous polyethylene films with good mechanical properties can be produced on the basis of hard-elastic specimens by uniaxial deformation. The so called ”guest-host” effect [1, 2] was explored to determine the order parameter of pores in a series of PE membranes so produced by polarized absorption spectroscopy using dichroic dyes dissolved in the nematic liquid crystal ZLI 1840 (LC) as indicator. The parameter of the orientation order SA of the pores along the draw direction was found to increase with increasing spin draw. A qualitative comparison of SA with the thermodynamic behavior of the dye + LC systems confined in the pores was made. The results obtained are related to the mechanism of porous structure formation.

Keywords Polyethylene membranesFluorescent dyesOrientation orderLiquid crystalsPolarized-light absorption spectroscopy

Copyright information

© Springer-Verlag Berlin Heidelberg 2001