Copolymerization Kinetics of Polyetyhylenglycol Allylether Type Polycarboxylate Superplasticizer

Abstract:

The free radical copolymerization kinetics of polyethylenglycol allylether (APEG) with acrylic acid (AA) had been studied in aqueous solution through using ammonium persulfate (APS) and 30% hydrogen peroxide (H₂O₂) as initiators. The structure of polycarboxylate superplasticizer had been characterized by IR and ¹H-NMR. The rate of copolymerization was proportional to the molar ratio of monomers (AA:APEG) to the power of 0.4405, and to the amount of initiator (1.5%APS-2%H₂O₂, mass ratio to monomers) to the power of 0.7819, respectively. The overall observed activation energy of copolymerization was 45.048 kJ/mol. The kinetic relationship of copolymerization reaction of APEG with AA had been established as follow: Rp∝[APEG/AA]^0.4405[APS-30%H₂O₂]^0.7819e^-5418/T. The temperature and initiator were main influencing factors on polymerization reaction.

• Periodical: Advanced Materials Research (Volume 936)
• Pages: 1393-1398
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.936.1393
• Online since: June 2014
• Authors: Ying Feng Tian, Xia Ping Zhu*, Ya Ting Deng, Kui Wang
• Keywords: Kinetics of Polymerization, Polycarboxylate Superplasticizer, Polyethylenglycol Allylether

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