Microwave accelerated synthesis and characterization of poly(acrylamide)

Singh, Vandana; Tiwari, Ashutosh; Kumari, Premlata; Sharma, Ajit

doi:10.1002/app.25682

Cited by 22 publications

(13 citation statements)

References 27 publications

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“…Further increase in MW wattage favours the mass loss, assuming the MW assisted degradation of the polymers from the MPCs [21].The dispersion of IONs into reaction mixture has enhanced the Y (%) by 25.9 due to the localized inductive heating[ Table.1]. …”

Section: Effect Of Mw Powermentioning

confidence: 99%

Fabrication and Characterization of Iron Oxide Filled Polyvinyl Pyrrolidone Nanocomposites

Agarwal¹,

Gupta²,

Alam³

et al. 2012

CMATERIALS

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The present work describes the synthesis and properties of nanomagnetic polymer composites (MPCs) comprising iron oxide nanoparticles as a filler and polyvinyl pyrrolidone (PVP) as polymer shell. The iron oxide nanoparticles were synthesized under alkaline medium using iron (II) salt. The nanocomposites were synthesized through free radical polymerization under microwave (MW) irradiation. X-ray diffraction reveals the uniform dispersion of iron oxide nanoparticles into polymer matrix. Furthermore, scanning electron microscopy images ensure the development of polymer shell around the nanomagnetic core. The magnetic behaviour of MPCs was studied through vibration sample magnetometry. The thermal durability of MPCs was assessed through simultaneous thermogravimetric-differential thermal analysis-differential thermogravimetry. With MW power ranging 25 to 100 W, the polymerization reactions were progressed resulting in MPCs with improved yield over neat PVP.

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Section: Effect Of Mw Powermentioning

confidence: 99%

Fabrication and Characterization of Iron Oxide Filled Polyvinyl Pyrrolidone Nanocomposites

Agarwal¹,

Gupta²,

Alam³

et al. 2012

CMATERIALS

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“…[22] The average bulk temperature was measured with a thermometer that was put in the reaction mixture immediately after the irradiation had stopped and was found to be less than 100 8C. Maximum conversion of 98.5% and the highest average molecular weights of 103.3 kDa were obtained without inert gas in aqueous solution of monomer and catalyst.…”

Section: Free-radical Polymerizationsmentioning

confidence: 99%

One Decade of Microwave‐Assisted Polymerizations: Quo vadis?

Ebner

Bodner

Stelzer

et al. 2011

Macromol. Rapid Commun.

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The application of microwave irradiation in polymer syntheses and modifications is of continuously growing interest and has received significant international interest since the beginning of the millennium. Preceded by a review that was published 6 years ago, the present paper summarizes the most recent trends in this research area. Radical as well as step-growth and ring-opening polymerizations will be addressed; furthermore, the evolution from microwave-assisted polymerizations to microwave-assisted material fabrication will be described on the examples of polymeranalogous reactions, polymer/metal composites and bio-based materials.

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“…Besides the strong rate enhancement under MW conditions, the obtained polymers qualities were slightly diminished with respect to their molar mass distribution. Singh et al [47] polymerized acrylamide in aqueous solution with potassium peroxodisulfate as the initiator under MW conditions using a domestic MW oven. The dependency of the monomer conversion on the MW power, irradiation time, initiator, and monomer concentration was investigated.…”

Section: Free Radical Homopolymerizationmentioning

confidence: 99%