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azobisisobutyronitrile
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Synthesis, characterization, and kinetic investigation of acrylic monomers derived from acetaminophen and ρ-cresol as model drug molecules
, Article Journal of Applied Polymer Science ; Volume 100, Issue 6 , 2006 , Pages 4369-4374 ; 00218995 (ISSN) ; Taghizadeh, S. M ; Gholami, M. R ; Sharif University of Technology
2006
Abstract
In this work, the synthesis, characterization, and kinetic investigation of the free-radical polymerization of 4-acetylaminobenzene propenoic ester (ABPE) and 4-methylbenzene propenoic ester (MBPE) were studied. The kinetic behaviors of ABPE and MBPE in the polymerization initiated by azobisisobutyronitrile in dimethylformamide solutions at temperatures between 50 and 120°C were investigated, and experimental and theoretical conversion-time curves were compared. Both monomers showed a polymerization ceiling temperature (T c ). Tc was calculated with experimental values of k pk1/2 with a constant concentration of 0.7 mol/L for monomers. Tc was about 141 and 131 °C for ABPE and MBPE,...
Improvement in oil absorbency by using modified carbon nanotubes in preparation of oil sorbents
, Article Advances in Polymer Technology ; Volume 32, Issue 1 , 2013 ; 07306679 (ISSN) ; Doulabi, M ; Sharif University of Technology
2013
Abstract
This article reports the first oil-absorbent cross-linked copolymer consisting of modified multiwalled carbon nanotube (MWCNT) and showing high oil absorbency. Also, to investigate and evaluate the effective parameters on oil absorbency, cross-linked dodecyl methacrylate (DDMA)-diphenylacrylamide (DPAA) and DDMA-butyl acrylate (BA) copolymers were synthesized. DDMA was copolymerized with different mol% of DPAA or BA and cross-linked using azobisisobutyronitrile as the initiator and various weight percentages of 1,4-butandiol dimethacrylate, methylene bisacrylamide, or vinyl group-modified MWCNT cross-linkers. The effects of monomer feed composition, cross-linker concentration, and the...