Membrane formation via thermally-induced phase separation from polypropylene/fatty acids systems

Title
Membrane formation via thermally-induced phase separation from polypropylene/fatty acids systems
Authors
김재진황정림김은영김성수
Keywords
thermally-induced phase separation; polypropylene; membrane; microporous membranes; membrane formation and structure; phase separation; hollow fiber; melt spinning
Issue Date
1994-01
Publisher
Membrane
Citation
VOL 19, NO 4, 242-249
Abstract
Microporous polypropylene membranes were prepared via thermally-induced phase separation from mixtures of polypropylene/soybean oil, polypropylene/oleic acid, and polypropylene/linoleic acid. The phase diagram of each system was obtained by thermal analysis and cloud point measurements. It was proved that each system has a liquid-liquid phase separation region at concentrations less than the monotectic composition. A cellular structure was obtained for each system, which is the typical structure for liquid-liquid phase separation via slow cooling. Fine structure with tiny polypropylene spherulites was obtained via quenching process. Mobility of diluent was related with its rejection during the polypropylene spherulite formation. A melt spinning apparatus was designed to produce microporous hollow fiber membranes. The mechanical strength of the hollow fiber seemed to be related to solution viscosity. Polypropylene/soybean oil samples had much greater solution viscosity than the other systems, and formed fibril structures with enhanced mechanical strength.
URI
http://pubs.kist.re.kr/handle/201004/21155
ISSN
03851036
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE