Radical polymerization of acrylamide initiated by ceric ammonium nitrate-methionine redox initiator system

A process simulation model and a statistical method comprising full factorial and response surface designs were employed to study and optimize acrylamide polymerization in a batch reactor. It was evaluated that the dependence of factors such as initial mass fractions of initiator and acrylamide, reacting temperature and operation time in affecting the polymer weight-average (Mw) of polyacrylamide and acrylamide conversion. The simulation model was established on the basis of a kinetic mechanism that refers to backbiting, termination by disproportionation and combination, as well as gel effect, to achieve the Mw of polyacrylamide and acrylamide conversion. Full factorial and response surface designs were developed to screen significant factors and to build reliable predictive function models for polyacrylamide Mw and acrylamide conversion. The results showed significant independent and interactive factor effects on polyacrylamide Mw and acrylamide conversion and were used to optimize the polymerization of acrylamide.

Section: Resultssupporting

confidence: 90%

Application of process simulation and statistical method to acrylamide polymerization in a batch reactor

et al. 2022

“…Several reports have appeared on the mechanism and kinetics of polymerization involving ceric ion alone1 and also in combination with reducing substrates such as alcohols,2, 3 1,2 diols,4 ketones,5 and amino acid,6 and poly(aminocarboxylic acid) 7–10. The same systems were also used as initiators for graft copolymerization of acrylonitrile (AN) and acrylamide11 and a block copolymer of ketonic resin–polyacrylonitrile 12…”

Section: Introductionmentioning

confidence: 99%

Electroinduced dispersion polymerization of acrylonitrile in the presence of poly(acrylic acid) and catalytic amount of CE(IV)

Saraç¹,

Ustamehmetoğlu²,

Yıldırım³

2002

Electroinduced dispersion polymerization of acrylonitrile initiated by Ce(IV) was performed in an electrolytic cell in the presence of poly(acrylic acid) (PAA). Micron-size polyacrylonitrile (PAN) particles were stabilized with PAA by electrostatic interaction or by a PAA-Ce(III)-PAN ternary complex formation. A PAA-PAN stable polymer was formed in the cathodic compartment, and the reduced initiator was reoxidized in the anode, thus allowing for the continuation of the process. A possible mechanism of polymerization is suggested.

Microwave accelerated synthesis and characterization of poly(acrylamide)

Singh¹,

Tiwari²,

Kumari³

et al. 2007

Poly(acrylamide) (PAM) was efficiently synthesized under microwave (MW) irradiation using catalytic amount of potassium persulfate. The synthesis does not require any inert atmosphere and could be accomplished in very short time. Microwave power, exposure time, concentration of persulfate, and concentration of the acrylamide were varied to optimize the polymerization in terms of the % conversion (%C). The maximum %C that could be achieved was in 98.5%. The average molecular weight of the synthesized PAM samples ranged from 4.11 Â 10 4 to 1.30 Â 10 5 , depending upon the MW power used for their synthesis. The representative PAM was characterized by Fourier transform-infrared, SEM, and X-ray diffraction studies.