P(DADMAAC-co-DMAA): Synthesis, thermal stability, and kinetics
Ayatzhan A. Tashenov A. Nurgeldi A. Zhanar O. Zhexenbek T. Kaldibek A. Nuraje N.
July 2021John Wiley and Sons Ltd
Polymers for Advanced Technologies
2021#32Issue 72669 - 2675 pp.
The kinetics of copolymerization is one of the key factors for optimization the process in large scale of production. Copolymerization of N, N-dimethyl-N,N-diallyammonium chloride (DMDAAC) with N,N-dimethyl acrylamide (DMAA) was studied by a dilatometer technique using ammonium persulfate ([NH4]2S2O8) as an initiator. The effect of the parameters (including molar ratio of DMDAAC to DMAA, concentrations of monomers [M] and initiator [I], and the temperature) on the polymerization rate was analyzed. From these analyses it was found that the polymerization rate (Rp) with the above variables can be represented as the following relationship: Rp∝ [M]2.63; Rp∝ [I]0.40 andRp∝[MDMDAAC:MDMAA]-0,86.The negative order found in the relationship of the reaction rate and the monomer composition indicated that the DMDAAC concentration in the monomers composition conversely affected the polymerization rate. The overall activation energy for the polymerization rate was 39.56 kJ/mol in the temperature range between 40°C and 60°C. Based on the experimental results, the mechanism of polymerization is discussed in detail. Different thermal properties for DMDAAC and DMDAAC-DMAA were observed by differential scanning calorimetry (DSC), and thermogravimetry (TG) analysis. Addition of DMAA to DMDAAC lowered the thermal stability relative to the home polymer of DMDAAC.
dimethyl acrylamide , dimethyl diallylammonium chloride , polymerization activation energy , polymerization kinetics , radical polymerization
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Faculty of Natural Sciecnes, L.N.Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan
Department of Analytical, Colloidal Chemistry and Technology of Rare Elements, Faculty of Chemistry and Chemical Technologies, Al-Farabi Kazakh National University, Almaty, Kazakhstan
Specialized Gymnasium for Gifted Children Teaching in Three Languages Named after Al-Farabi, Almaty, Kazakhstan
Department of Chemical Technology of Organic Compounds and Polymers, Satpaev University, Kazakhstan
Department of Chemical and Materials Engineering, Nazarbayev University, Nur-Sulatn, Kazakhstan
Faculty of Natural Sciecnes
Department of Analytical
Specialized Gymnasium for Gifted Children Teaching in Three Languages Named after Al-Farabi
Department of Chemical Technology of Organic Compounds and Polymers
Department of Chemical and Materials Engineering
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