Graft polymerization of vinyl monomers onto cellulose in presence of soda lime glass. I

Mansour, Olfat Y.; Nagaty, Ahmed

doi:10.1002/pol.1975.170131213

Cited by 17 publications

(7 citation statements)

References 7 publications

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“…Microwave radiation (MWR) assists in direct heating of solvents and reactants. Owing to this interesting heating mechanism, which is clearly different from other conventional heating, selective heating can be accomplished and many reactions can be accelerated (Mansour and Nagaty, 1975 ). MWR technique reduces the extent of physicochemical stresses to which the fibers are exposed during the conventional techniques.…”

Section: Introductionmentioning

confidence: 99%

Microwave induced synthesis of graft copolymer of binary vinyl monomer mixtures onto delignified Grewia optiva fiber: application in dye removal

et al. 2014

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Grafting method, through microwave radiation technique is very effective in terms of time consumption, cost effectiveness and environmental friendliness. Via this method, delignified Grewia optiva identified as a waste biomass, was graft copolymerized with methylmethacrylate (MMA) as an principal monomer in a binary mixture of ethyl methacrylate (EMA) and ethyl acrylate (EA) under microwave irradiation (MWR) using ascorbic acid/H2O2 as an initiator system. The concentration of the comonomer was optimized to maximize the graft yield with respect to the primary monomer. Maximum graft yield (86.32%) was found for dGo-poly(MMA-co-EA) binary mixture as compared to other synthesized copolymer. The experimental results inferred that the optimal concentrations for the comonomers to the optimized primary monomer was observed to be 3.19 mol/L × 10−1 for EMA and 2.76 mol/L × 10−1 for EA. Delignified and graft copolymerized fiber were subjected to evaluation of physicochemical properties such as swelling behavior and chemical resistance. The synthesized graft copolymers were characterized with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and X-ray diffraction techniques. Thermal stability of dGo-poly(MMA-co-EA) was found to be more as compared to the delignified Grewia optiva fiber and other graft copolymers. Although the grafting technique was found to decrease percentage crystallinity and crystallinity index among the graft copolymers but there was significant increase in their acid/base and thermal resistance properties. The grafted samples have been explored for the adsorption of hazardous methylene dye from aqueous system.

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Section: Introductionmentioning

confidence: 99%

Microwave induced synthesis of graft copolymer of binary vinyl monomer mixtures onto delignified Grewia optiva fiber: application in dye removal

et al. 2014

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“…Graft copolymerization of starch and other natural macromolecules can be initiated by transition metal ions 5 of which Fe 3ϩ , Cu 2ϩ , Co 3ϩ , V 3ϩ , and Cr 6ϩ are the most commonly used initiators. Ce 4ϩ was widely used in the graft modification of cellulose, 6 fiber, 7 gelatin, 8 and starch. 9 The present investigation deals with the detailed study on some major factors that affect graft polymerization of methyl methacrylate (MMA) onto PVA using ceric ammonium sulfate (CAS) as initiator in aqueous mediums of different pH.…”

Section: Introductionmentioning

confidence: 99%

Graft polymerization of methyl methacrylate onto polyvinyl alcohol using Ce4+ initiator

Chowdhury¹,

Banerjee²

1998

J. Appl. Polym. Sci.

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Methyl methacrylate (MMA) was graft polymerized onto polyvinyl alcohol (PVA) using ceric ammonium sulfate as an initiator in aqueous medium. The grafting efficiency of MMA was studied as a function of monomer and initiator concentration, time, pH, and temperature. Grafting efficiency was found to be optimum at a particular level of ceric ammonium sulfate (3.16 ϫ 10, and time (4 h). The probable reasons for the influence of reaction variable on the observed trend of MMA towards grafting have been discussed. Acid hydrolysis and infrared spectroscopy were used for the confirmation of graft copolymer formation. Thermogravimetric analysis of PVA and a representative graft copolymer were studied. The solubility/swellability and the gelatinization characteristics are also reported.

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“…Since styrene does not graft cohigh initiating ability and wider applicability. [12][13][14] polymerize with starch in the presence of ceric Starch is a partial crystalline polymer. The oution, two alternative methods were taken to prestanding characteristic of starch is its biodegradpare starch-g-PS.…”

Section: Introductionmentioning

confidence: 99%

Graft copolymerization of starch-AN initiated by potassium permanganate

Gao

Wang

et al. 1998

J. Appl. Polym. Sci.

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ABSTRACT:The initiating ability of the potassium permanganate in the graft copolymerization of acrylonitrile onto starch was studied. The results indicate that the grafting parameters, such as concentrations of potassium permanganate, acrylonitrile, starch, and catalyst acids, all have significant effects on the graft copolymerization and the components of the graft copolymers, and this offers methods to adjust the properties of the graft copolymers. The sources of starch and corn starch derivatives both affected the components of the graft copolymers, which showed the influence of functional group on the grafting ability of starch. The preheat treatment and preoxidation of starch, as well as the adding sequence of the reactants all influenced the graft copolymerization, from which some suggestions about the grafting procession could be obtained.

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Graft polymerization of vinyl monomers onto cellulose in presence of soda lime glass. I

Cited by 17 publications

References 7 publications

Microwave induced synthesis of graft copolymer of binary vinyl monomer mixtures onto delignified Grewia optiva fiber: application in dye removal

Microwave induced synthesis of graft copolymer of binary vinyl monomer mixtures onto delignified Grewia optiva fiber: application in dye removal

Graft polymerization of methyl methacrylate onto polyvinyl alcohol using Ce4+ initiator

Graft copolymerization of starch-AN initiated by potassium permanganate

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