Hydrophobic surface properties of fluoropolyetherimide blends for pervaporation membranes | Zendy

Larhrafi M | Zendy; Mas A | Zendy; Toreis N | Zendy; Blancou H | Zendy; Schué F | Zendy

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Hydrophobic surface properties of fluoropolyetherimide blends for pervaporation membranes

Author(s) -

Larhrafi M,

Mas A,

Toreis N,

Blancou H,

Schué F

Publication year - 2003

Publication title -

polymer international

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.592

H-Index - 105

eISSN - 1097-0126

pISSN - 0959-8103

DOI - 10.1002/pi.1373

Subject(s) - polyetherimide , materials science , pervaporation , membrane , polymer chemistry , diamine , chemical engineering , scanning electron microscope , monomer , phenylene , wetting , polymer blend , interfacial polymerization , polymer , composite material , copolymer , chemistry , permeation , biochemistry , engineering

The well‐known polyetherimide (ULTEM 1000) is obtained by step‐reaction of bisphenol. A diphthalic anhydride (BAPA) with m‐phenylene diamine and newly related fluorinated poly etherimides synthesized from BAPA and 2,3‐bis(2,2,3,3,4,4,5,5,5‐nonafluoropentyl)butan‐1,4 diamine (NFD) led to compatible blends over the entire range of composition. Miscible one‐phase blends have been suggested by a good correlation of T g versus NFD monomer unit weight fraction ( w ) (Fox and Couchman equations) and a regular morphology by scanning electron microscopy. Surface energy of blend films fell from 45.3 to 27.4 mJ m −2 for w ≥ 0.1 corresponding to a NFD molar fraction y ≥ 0.06. Cast‐evaporated films from fluorinated copolyetherimides and blends with y < 0.15 were ductile and gave conveniently hydrophobic non‐porous membranes that withstood the experimental conditions of pervaporation tests. Copyright © 2003 Society of Chemical Industry

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