KINETICS AND MECHANISM OF GRAFT COPOLYMERIZATION OF VINYL MONOMERS (ACRYL AMIDE, ACRYLIC ACID, METHACRYLATE) ONTO STARCH BY POTASSIUM DICHROMATE AS REDOX INITIATOR

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TAGHI ZADEH M.T.; KHOSRAVI M.

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Journal: Iranian Polymer Journal Year:2003 | Volume:12 | Issue:6 Page(s): 497-505

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Title

KINETICS AND MECHANISM OF GRAFT COPOLYMERIZATION OF VINYL MONOMERS (ACRYL AMIDE, ACRYLIC ACID, METHACRYLATE) ONTO STARCH BY POTASSIUM DICHROMATE AS REDOX INITIATOR

Author(s)

TAGHI ZADEH M.T. | KHOSRAVI M. | Issue Writer Certificate

Keywords

KINETICSQ4

STARCHQ4

VINYL MONOMERSQ4

POTASSIUM DICHROMATEQ4

GRAFT COPOLYMERIZATIONQ4

Abstract

Synopsis GRAFT COPOLYMERIZATION of VINYL MONOMERS including acryl amide (AAm), acrylic acid (AAc) and methyl methacrylate (MMA) onto STARCH (St) has been carried out under nitrogen atmosphere in aqueous solution using POTASSIUM DICHROMATE, Cr(VI), as redox initiator individually. Dependence of graft yield upon monomer, STARCH and initiator concentration is investigated as well as reaction temperature by using of gravimetery method. Rate equations obtained are: Rg=[AAm]0.93[I]0.49[St]0.52, Rg=k[AAC]0.95[I]0.44[St]0.46 and Rg=k[MMA]0.95[I]0.44[St]0.46 for St-g-Pam, St-g-PAAc and St-g-PMMA graft polymers, respectively. The KINETICS of grafting process has been evaluated by bromometery titration. Finally, activation energies within temperature 50-55°C for St-g-PAAm, St-g-PAAc and St-g-PMMA synthesizes are found to be 48.16, 46.13 and 49.06 kJ/mol.k, respectively. Based on results observed, a suitable mechanism is proposed to justify the results.

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APA: Copy

TAGHI ZADEH, M.T., & KHOSRAVI, M.. (2003). KINETICS AND MECHANISM OF GRAFT COPOLYMERIZATION OF VINYL MONOMERS (ACRYL AMIDE, ACRYLIC ACID, METHACRYLATE) ONTO STARCH BY POTASSIUM DICHROMATE AS REDOX INITIATOR. IRANIAN POLYMER JOURNAL (ENGLISH), 12(6), 497-505. SID. https://sid.ir/paper/85881/en

Vancouver: Copy

TAGHI ZADEH M.T., KHOSRAVI M.. KINETICS AND MECHANISM OF GRAFT COPOLYMERIZATION OF VINYL MONOMERS (ACRYL AMIDE, ACRYLIC ACID, METHACRYLATE) ONTO STARCH BY POTASSIUM DICHROMATE AS REDOX INITIATOR. IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2003;12(6):497-505. Available from: https://sid.ir/paper/85881/en

IEEE: Copy

M.T. TAGHI ZADEH, and M. KHOSRAVI, “KINETICS AND MECHANISM OF GRAFT COPOLYMERIZATION OF VINYL MONOMERS (ACRYL AMIDE, ACRYLIC ACID, METHACRYLATE) ONTO STARCH BY POTASSIUM DICHROMATE AS REDOX INITIATOR,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 12, no. 6, pp. 497–505, 2003, [Online]. Available: https://sid.ir/paper/85881/en

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