Copolymerization of Vinylidene Fluoride and Acrylic Acid in Supercritical Carbon Dioxide

被引：14

作者：

Firetto, Vanessa ^{[1
]}

Scialdone, Onofrio ^{[1
]}

Silvestri, Giuseppe ^{[1
]}

Spinella, Alberto ^{[2
]}

Galia, Alessandro ^{[1
]}

机构：

[1] Univ Palermo, Dipartimento Ingn Chim Proc & Mat, I-90128 Palermo, Italy

[2] Univ Palermo, Ctr Grandi Apparecchiature, I-90128 Palermo, Italy

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2010年 / 48卷 / 01期

关键词：

acrylic acid; copolymerization; fluoropolymers; free-radical copolymerization; membrane; radical polymerization; supercritical fluids; vinylidene fluoride; CONTINUOUS PRECIPITATION POLYMERIZATION; POLY(VINYLIDENE FLUORIDE); PERFLUOROPOLYETHER SURFACTANTS; POLYMERS; MORPHOLOGY; PVDF; CRYSTALLINE; BEHAVIOR; DRUGS;

D O I：

10.1002/pola.23766

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The free-radical Copolymerization of vinylidene fluoride (VDF) and acrylic acid (AA) was carried out in supercritical carbon dioxide using both precipitation and dispersion techniques in the presence of an ammonium carboxylate perfluoropolyether compound. Formation of a copolymer was confirmed by variable contact time CP MAS NMR spectroscopy. Macromolecular matrices were significantly enriched in AA with respect to the initial feed composition and we found that the nonfluorinated monomer has a much higher reactivity ratio with respect to VDF. The cumulative concentration, crystallinity, and water affinity of the synthesized copolymers could be modified changing the initial feed composition, the density of the polymerization mixture, the specific interfacial area of the polymer phase, and the polymerization time. The solubility of the macromolecular product in water was greatly affected by its composition. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 109-121, 2010

引用

页码：109 / 121

页数：13

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