Study of polypropylene morphology obtained from blown and cast film processes : Initial morphology requirements for making membranes porous by stretching

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DOIResolve DOI: http://doi.org/10.1177/8756087905057085
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TypeArticle
Journal titleJournal of plastic film & sheeting
Volume21
Issue3
Pages199216; # of pages: 18
SubjectPolypropylene; orientation; porous membrane; stretching
AbstractFour different polypropylene (PP) resins are extruded using the tubular blown and cast film processes. The resin morphology is observed by SEM and the effect of extrusion processing variables on the morphology is investigated. Melt rheological experiments are also carried out to characterize the polymer melts. It has been found that the molecular weight distribution and the chain structure as well as the processing conditions have important effects on the morphology. Efforts have been focused on developing a row-nucleated morphology from PPs through the control of processing conditions. The possibility of generating a porous membrane from the initial row-nucleated morphology using a stretching technique is evaluated. It has been found that the initial lamellae arrangement of the precursor films and the stretching conditions play a significant role in obtaining a porous structure.
Publication date
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedNo
NRC number54306
NPARC number18426151
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Record identifier4220542b-5373-4fbe-b5f1-5b18bebf2c74
Record created2011-08-16
Record modified2016-05-09
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