Copolymerization of Vinylidene Fluoride and Acrylic Acid in Supercritical Carbon Dioxide

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13 Citazioni (Scopus)

Abstract

The free-radical copolymerization of vinylidene fluoride (VDF) and acrylic acid (AA) was carried out in supercriticalcarbon dioxide using both precipitation and dispersion techniques in the presence of an ammonium carboxylate perfluoropolyethercompound. Formation of a copolymer was confirmed by variable contact time CP MAS NMR spectroscopy. Macromolecularmatrices were significantly enriched in AA with respect to the initial feed composition and we found that the nonfluorinatedmonomer 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 inwater was greatly affected by its composition.
Lingua originaleEnglish
pagine (da-a)109-121
Numero di pagine13
RivistaDefault journal
Volume48
Stato di pubblicazionePublished - 2010

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Carbon Dioxide
Copolymerization
Copolymers
Chemical analysis
Polymerization
Ammonium Compounds
Nuclear magnetic resonance spectroscopy
Free Radicals
Polymers
Solubility
Water
acrylic acid
1,1-difluoroethylene

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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title = "Copolymerization of Vinylidene Fluoride and Acrylic Acid in Supercritical Carbon Dioxide",
abstract = "The free-radical copolymerization of vinylidene fluoride (VDF) and acrylic acid (AA) was carried out in supercriticalcarbon dioxide using both precipitation and dispersion techniques in the presence of an ammonium carboxylate perfluoropolyethercompound. Formation of a copolymer was confirmed by variable contact time CP MAS NMR spectroscopy. Macromolecularmatrices were significantly enriched in AA with respect to the initial feed composition and we found that the nonfluorinatedmonomer 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 inwater was greatly affected by its composition.",
keywords = "acrylic acid, copolymerization, fluoropolymers, freeradical copolymerization, membrane, radical polymerization, supercritical fluids, vinylidene fluoride",
author = "Onofrio Scialdone and Vanessa Firetto and Alessandro Galia and Giuseppe Silvestri and Alberto Spinella",
year = "2010",
language = "English",
volume = "48",
pages = "109--121",
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TY - JOUR

T1 - Copolymerization of Vinylidene Fluoride and Acrylic Acid in Supercritical Carbon Dioxide

AU - Scialdone, Onofrio

AU - Firetto, Vanessa

AU - Galia, Alessandro

AU - Silvestri, Giuseppe

AU - Spinella, Alberto

PY - 2010

Y1 - 2010

N2 - The free-radical copolymerization of vinylidene fluoride (VDF) and acrylic acid (AA) was carried out in supercriticalcarbon dioxide using both precipitation and dispersion techniques in the presence of an ammonium carboxylate perfluoropolyethercompound. Formation of a copolymer was confirmed by variable contact time CP MAS NMR spectroscopy. Macromolecularmatrices were significantly enriched in AA with respect to the initial feed composition and we found that the nonfluorinatedmonomer 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 inwater was greatly affected by its composition.

AB - The free-radical copolymerization of vinylidene fluoride (VDF) and acrylic acid (AA) was carried out in supercriticalcarbon dioxide using both precipitation and dispersion techniques in the presence of an ammonium carboxylate perfluoropolyethercompound. Formation of a copolymer was confirmed by variable contact time CP MAS NMR spectroscopy. Macromolecularmatrices were significantly enriched in AA with respect to the initial feed composition and we found that the nonfluorinatedmonomer 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 inwater was greatly affected by its composition.

KW - acrylic acid

KW - copolymerization

KW - fluoropolymers

KW - freeradical copolymerization

KW - membrane

KW - radical polymerization

KW - supercritical fluids

KW - vinylidene fluoride

UR - http://hdl.handle.net/10447/58321

M3 - Article

VL - 48

SP - 109

EP - 121

JO - Default journal

JF - Default journal

ER -