Analysis of microporous membranes obtained from polypropylene films by stretching

Download
  1. (PDF, 771 KB)
  2. Get@NRC: Analysis of microporous membranes obtained from polypropylene films by stretching (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.memsci.2007.01.023
AuthorSearch for: ; Search for: ; Search for:
TypeArticle
Journal titleJournal of Membrane Science
Volume292
Issue1-2
Pages6271; # of pages: 10
SubjectMembranes; Polypropylene; Stretching; Lamellar structure; Orientation
AbstractFive different polypropylene resins were selected to develop microporous membranes through melt extrusion and stretching (cast film process). The effect of the polymer melt elongation properties on the row-nucleated lamellar crystallizationwas investigated. The arrangement and orientation of the crystalline and amorphous phases were examined byWAXD (wide angle X-ray diffraction) and FTIR (Fourier transform infrared) methods. The extrusion and cooling parameters were adjusted properly to obtain uniform precursor films with appropriate morphology. Annealing, cold and hot stretching were consequently employed to generate and enlarge the pores. It was found that molecular weight was the most important material factor that controlled the membrane structure. The role of annealing and stretching parameters was also investigated. The permeability to water vapor (under atmospheric condition) and nitrogen (under pressure) was measured. It was observed that the permeability increased with increasing pressure and went through a transition from Knudsen diffusion to Poiseuille flow.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC number53648
NPARC number15812401
Export citationExport as RIS
Report a correctionReport a correction
Record identifier76df8dc7-009e-459c-8491-fd9f3d5c7b35
Record created2010-07-19
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)