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Title
Characterization and monomer reactivity ratios of grafted cellulose with N-(4-nitrophenyl)acrylamide and methyl methacrylate by atom transfer radical polymerization
Authors
NEVIN CANKAYA and M. MURSIT
Received
November 17, 2011
Published
Volume 46, Issue 9-10 November-December
Keywords
ATRP, cellulose, graft copolymer, monomer reactivity ratios
Abstract
N-(4-nitrophenyl)acrylamide (4NPA) original monomer was synthesized and characterized by FT-IR, 1
H and 13C NMR techniques. The atom transfer radical polymerization (ATRP) of 4NPA with methyl methacrylate (MMA) were
performed in dimethylformamide (DMF) at 130 0
C in the presence of cellulose chloroacetate (Cell.ClAc) macro
initiator, Cu(I)Cl/2,2’-bipyridine catalytic system. The graft copolymers were characterized by elemental analysis, FTIR spectra and thermal analysis. Thermal stabilities of the graft copolymers were determined by the TGA method and it
was established that thermal stability of the copolymers increased with the increase of MMA units, while it decreased
with the increase of 4NPA units. In order to investigate the effect of 4NPA with MMA monomer interactions on
grafting, the graft copolymerization was also studied using different feed compositions, ranging from 0.15 to 0.85. The
reactivity ratios of 4NPA and MMA by ATRP on cellulose were determined using the Finemann–Ross (F–R), inverted
Finemann–Ross (inverted F–R), Yezrielev–Brokhina–Roskin (Y–B–R), Kelen–Tüdos (K–T) and extended Kelen–
Tüdos (extended K–T) linearization methods. The reactive ratios of r1 and r2 were found to be 0.017-0.116 and 1.209-
1.472, respectively. The graft copolymers on cellulose r1.r2 are close to zero.
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