Grafting of acrylonitrile and methyl methacrylate from their binary mixtures on cellulose using ceric ions

Gupta, K. C.; Sahoo, Sudhansu S.

doi:10.1002/1097-4628(20010131)79:5<767::aid-app10>3.0.co;2-#

Cited by 30 publications

(20 citation statements)

References 20 publications

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“…When compared with photopolymerization and CRP, redox polymerization has the advantage of easy control of the polymerization reaction at ambient temperature and is widely applied in graft copolymerization in the solution or on the surface . Cerium (IV) Ce 4+ and hydroxyl terminated polymers are demonstrated to be an effective redox pair capable of initiating polymerization of many monomers, leading to the formation of block copolymers or brush‐shaped polymers . Therefore, the surface‐initiated redox polymerization, particularly cerium ammonium nitrate as an initiator, can be potential to use polymerization‐assisted signal amplification.…”

Section: Introductionmentioning

confidence: 99%

“…[22][23][24][25][26] Cerium (IV) Ce 41 and hydroxyl terminated polymers are demonstrated to be an effective redox pair capable of initiating polymerization of many monomers, leading to the formation of block copolymers or brush-shaped polymers. [27][28][29][30][31] Therefore, the surface-initiated redox polymerization, particularly cerium ammonium nitrate as an initiator, can be potential to use polymerization-assisted signal amplification. However, to our best knowledge, the detail of redox polymerization in molecular diagnosis system was less reported.…”

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confidence: 99%

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A combining signal amplification of atom transfer radical polymerization and redox polymerization for visual biomolecules detection

Zhuang

Shen

Liu

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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A novel combination of atom transfer radical polymerization (ATRP) and redox polymerization is here used to allow instrument-free visualization of special biomolecules for which dynamic polymer growth is used in signal amplification. In this method, the convenient and mild redox polymerizationassisted amplification with cerium ammonium (IV) nitrate as oxidant at the second stage was achieved by directly using the hydroxyl groups from poly(hydroxyethyl methacrylate) (PHEMA) synthesized via ATRP at the first stage. The brushed polymers poly(hydroxylethyl methacrylate)-branched-poly (acrylamide) (PHEMA-branched-PAM) prepared by successive ATRP and redox polymerization in situ drastically grew up at the detected biomolecules spot to improve the visibility of biomolecule and simplify the detection procedure. With the proposed strategy, the signal amplification of streptavidin (SA) as model detected biomolecule was investigated on two different substrates such as silicon wafer and gold, respectively. As a result, detection limit of SA was demonstrated on the gold substrates where binding of 1.0 ng/mL SA was differentiable from the background using ellipsometry. Moreover, binding of 0.5 nmol/L DNA led to visually distinguishable spots on the gold surface under mild condition. The proposed method exhibited an efficient amplification performance for molecules detection, and paved a new way for visual diagnosis of biomolecules.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

A combining signal amplification of atom transfer radical polymerization and redox polymerization for visual biomolecules detection

Zhuang

Shen

Liu

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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“…A number of methods have already existed today for improving the interfacial interaction between lignocellulosics and thermoplastics [10]. Among them: (i) the chemical modification of a lignocellulosic, either by condensation or free radical reaction [11][12][13][14][15][16][17][18][19] (ii) the use of modified thermoplastic containing a compound capable of interacting with a lignocellulosic [20][21][22][23], (iii) the addition of a third component with the ability to interact simultaneously at the interface with the thermoplastic and the lignocellulosic (compatibiliser) [24][25][26][27]. Chemical analysis of OPEFB shows that OPEFB consist of 65% cellulose and 19% lignin [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of electron beam irradiation and poly(vinylpyrrolidone) addition on mechanical properties of polycaprolactone with empty fruit bunch fibre (OPEFB) composite

Ibrahim¹,

Ahmad²,

Yunus³

et al. 2009

Express Polym. Lett.

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Abstract. Biodegradable composites or green composites were prepared by melt blending technique using polycaprolactone and oil palm empty fruit bunch fibre (OPEFB). Since OPEFB is not compatible with PCL a binder, poly(vinyl pyrrolidone), (PVP) was used to improve the interaction between PCL and OPEFB. The composites produced were irradiated using electron beam to improve the mechanical properties. The tensile, flexural and impact strengths of PCL/OPEFB composites were improved by addition of 1% by weight of PVP and irradiated with 10 kGy of electron beam. The FTIR spectra indicate a slight increase of frequencies at C=O peaks from 1730 to 1732 cm -1 after irradiation indicates some interaction between C=O and O-H. The surface morphology of the facture surface obtained from tensile test shows no fibre pull out indicating good adhesion between the OPEFB and PCL after addition of PVP.

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“…So far many neutral monomers such as acrylamide, methyl methacrylate, vinyl alcohol, styrene, acrylonitrile, butadiene and vinyl acetate; anionic monomers such as acrylate and 2-acrylamido-2-methyl-1-propanesulfonate, sodium styrenesulfonate; and cationic monomers such as 2-hydroxy-3-methacryloyloxypropyltrimethyl ammonium chloride, dimethyldiallylammonium chloride, and 2-dimethylaminoethyl methacrylate have been grafted onto various starch substrates [1][2][3][4][5][6][7][8][9][10][11]. These graft products find many different applications and hold industrial promise for the future.…”

Section: Introductionmentioning

confidence: 99%

“…2, an increase of pH from 1.7 to 2.0 resulted in an increase of GP and GE while further increase to 4.0 induced a decrease in GP and GE. The reported studies on ceric ion-initiated polymerization have clearly indicated that ceric ions in the absence of sufficient acid easily form inactive species with water molecules[10]. However, an excess amount of acid is also unfavorable for the generation of free radicals at the starch backbone as shown by the following equilibrium:Ce 4+ + St -H a Ce 3+ + St • + H + Hence, the pH of the reaction medium should be carefully selected to maintain the activity of the ceric ions to create active sites at the starch backbone.…”

mentioning

confidence: 99%

Synthesis and Thermal Degradation of a Novel Starch Graft Copolymer Incorporating a Sulfobetaine Zwitterionic Monomer

Zhang

Hu²

2002

Starch/Stärke

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A novel starch graft copolymer containing sulfobetaine moieties in the side chains was synthesized by grafting the sulfobetaine zwitterionic monomer 3‐dimethyl(methacryloyloxyethyl) ammonium propane sulfonate (DMAPS) onto potato starch in the presence of the ceric ammonium nitrate (CAN) / acid initiation system. The effects of the concentrations of CAN and DMAPS, the pH of the reaction medium and the polymerization temperature on the grafting reactions were investigated in terms of the grafting percentage (GP) and grafting efficiency (GE). When the CAN concentration, the pH of the reaction medium or the reaction temperature increased, GP and GE were found to first increase and then to decrease. The increase of DMAPS concentration resulted in a significant enhancement of GP and GE. Furthermore, the thermal degradation of such graft copolymer was studied under air atmosphere at various heating rates, and the corresponding activation energy of the degradation was determined by Ozawa's method.

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Grafting of acrylonitrile and methyl methacrylate from their binary mixtures on cellulose using ceric ions

Cited by 30 publications

References 20 publications

A combining signal amplification of atom transfer radical polymerization and redox polymerization for visual biomolecules detection

A combining signal amplification of atom transfer radical polymerization and redox polymerization for visual biomolecules detection

Effect of electron beam irradiation and poly(vinylpyrrolidone) addition on mechanical properties of polycaprolactone with empty fruit bunch fibre (OPEFB) composite

Synthesis and Thermal Degradation of a Novel Starch Graft Copolymer Incorporating a Sulfobetaine Zwitterionic Monomer

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