✦ LIBER ✦

A novel polypropylene microporous film

✍ Scribed by Wei Zhu; Xian Zhang; Chuntian Zhao; Wei Wu; Jianan Hou; Mao Xu

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 957 KB
Volume: 7
Category: Article
ISSN: 1042-7147
DOI: 10.1002/(sici)1099-1581(199609)7:9<743::aid-pat548>3.0.co;2-w

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✦ Synopsis

The structure and properties of a polypropylene microporous film prepared by biaxial stretching of non-porous polypropylene film of high p-cystal content were investigated. The porosity of these films can be as high as 3040%, and the average pore size was around 0.05 pm. The films were found to have the structure of a two-phase interpenetrating network; both the polypropylene and the pore regions were three-dimensionally continuous. The advantages of the biaxially stretched microporous films are the combination of high permeability to fluids with good mechanical properties and almost circular pore shape with narrow pore size distribution. The application of this microporous film for battery separators, filtration membranes and substrates of functional polymer composites is discussed.

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