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2005-10-01 - Article/Dans un journal avec peer-review - Anglais - 9 page(s)

Ydens I., Degée Philippe, Haddleton D., Dubois Philippe , "Reactivity ratios in conventional and nickel-mediated radical copolymerization of methyl methacrylate and functionalized methacrylate monomers" in European Polymer Journal, 41, 10, 2255-2263

  • Edition : Elsevier Science
  • Codes CREF : Chimie macromoléculaire (DI1315), Catalyses hétérogène et homogène (DI1334)
  • Unités de recherche UMONS : Matériaux Polymères et Composites (S816)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
Texte intégral :

Abstract(s) :

(Anglais) Copolymerization of an excess of methyl methacrylate (MMA) relative to 2-hydroxyethyl methacrylate (HEMA) was carried out in toluene at 80 °C according to both conventional and controlled Ni-mediated radical polymerizations. Reactivity ratios were derived from the copolymerization kinetics using the Jaacks method for MMA and integrated conversion equation for HEMA (rMMA = 0.62 ± 0.04; rHEMA = 2.03 ± 0.74). Poly(ethylene glycol) a-methyl ether, ?-methacrylate (PEGMA, Mn = 475 g mol-1) was substituted for HEMA in the copolymerization experiments and reactivity ratios were also determined (rMMA = 0.75 ± 0.07; rPEGMA ~ 1.33). Both the functionalized comonomers were consumed more rapidly than MMA indicating the preferred formation of heterogeneous bottle-brush copolymer structures with bristles constituted by the hydrophilic (macro)monomers. Reactivity ratios for nickel-mediated living radical polymerization were comparable with those obtained by conventional free radical copolymerization. Interactions between functional monomers and the catalyst (NiBr2(PPh3)2) were observed by 1H NMR spectroscopy.

Notes :
  • (Anglais) Publié en ligne le 24 juin 2005
  • (Anglais) Lecture en ligne: http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TWW-4GG8W4S-3-12&_cdi=5573&_user=532054&_pii=S0014305705001692&_origin=search&_coverDate=10%2F31%2F2005&_sk=999589989&view=c&wchp=dGLbVtb-zSkzS&md5=eccf756569b0bd07a12df68e9a7bc75
Identifiants :
  • DOI : 10.1016/j.eurpolymj.2005.04.012