Effect of annealing on the morphology of porous polypropylene hollow fiber membranes

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Three different polypropylene resins were selected to develop microporous membranes through melt spinning, annealing and stretching. The effects of take-up speed, cooling rate, stretching, and annealing temperature on the crystalline structure and orientation of the membrane were investigated using field emission scanning electron microscopy. An annealing process was employed to generate and enlarge the pores and lamellar structure, and improved the crystallinity of hollow fiber precursors, before the stretching process. The annealed hollow fiber precursor was stretched by cold, hot, and cold/hot complex stretching. We observed that porous structure on the outer and inner surfaces of the stretched precursor fibers were produced by cold and hot complex stretching.
Publisher
POLYMER SOC KOREA
Issue Date
2014-06
Language
English
Article Type
Article
Keywords

INDUCED PHASE-SEPARATION; CRYSTALLIZATION; FILMS

Citation

MACROMOLECULAR RESEARCH, v.22, no.6, pp.618 - 623

ISSN
1598-5032
DOI
10.1007/s13233-014-2087-9
URI
http://hdl.handle.net/10203/189990
Appears in Collection
CBE-Journal Papers(저널논문)
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