Artículo
Magnetic field effects on the copolymerization of water-soluble and ionic monomers
Fecha de publicación:
01/2009
Editorial:
John Wiley & Sons Inc
Revista:
Journal of Polymer Science Part A: Polymer Chemistry
ISSN:
0887-624X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The effect of magnetic field (MF) on the radical copolymerization of a series of water-soluble and ionic monomers is presented including acrylamide (AM), acrylic acid (AA), its ionized form acrylate (A-), and diallyldimethylammonium chloride (DADMAC). The following combinations have been studied: AM/AA, AM/A-, AM/DADMAC, and AA/DADMAC. In addition to the MF, strong electrostatic interactions are present for the majority of monomer combinations and conditions. Although the monomer consumption rate (Rp) increased up to 65% applying a MF of 0.1 Tesla, the composition of the resulting copolymers was not affected under such conditions. Despite this increase of Rp by MF, the electrostatic repulsion between ionic monomers and charged growing radicals dominates Rp and governs the copolymer composition with and without MF. The order of the experimentally obtained reactivity ratios reflects the extent of electrostatic interaction: rAM/AA (1.41) < rAM/A- (3.10) < rAA/DADMAC (4.25) < rAM/DADMAC (6.95) and rAA/AM (2.20) > rDADMAC/AA (0.25) > rA-/AM (0.17) > rDADMAC/AM (0.03). Overall, weak MF offers to reduce the production time without modifying the product composition.
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Articulos(INTEC)
Articulos de INST.DE DES.TECNOL.PARA LA IND.QUIMICA (I)
Articulos de INST.DE DES.TECNOL.PARA LA IND.QUIMICA (I)
Citación
Rintoul, Ignacio; Wandrey, Christine; Magnetic field effects on the copolymerization of water-soluble and ionic monomers; John Wiley & Sons Inc; Journal of Polymer Science Part A: Polymer Chemistry; 47; 2; 1-2009; 373-383
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