DETERMINATION OF MONOMERS REACTIVITY RATIOS IN ETHYL ACRYLATE-METHACRYLIC ACID COPOLYMERIZATION BY OFF-LINE 1H NMR

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ASHENAGAR SAMANEH; ZIAEE FARSHID; JALILIAN SEYED MEHRDAD; Shabani Iman; MEHDIPOUR ATAEI SHAHRAM; ABBASSI SOURKI FOROUD

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Journal: Iranian Journal of Polymer Science and Technology Year:2017 | Volume:30 | Issue:1 Page(s): 31-42

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Title

DETERMINATION OF MONOMERS REACTIVITY RATIOS IN ETHYL ACRYLATE-METHACRYLIC ACID COPOLYMERIZATION BY OFF-LINE 1H NMR

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Keywords

REACTIVITY RATIOSQ1

COPOLYMERIZATIONQ2

ETHYL ACRYLATEQ1

METHACRYLIC ACIDQ1

OFF LINE GENERALIZED LEAST SQUAREQ1

Abstract

The physical, chemical and mechanical properties of polymer systems depend on the micro-structural characteristics of their macromolecular chains. Along with the most characteristic kinetic parameters in COPOLYMERIZATION reactions are the REACTIVITY RATIOS, which give a clear idea of the average composition and the monomer sequence distribution in copolymer systems. This research studies the solution radical COPOLYMERIZATION of METHACRYLIC ACID (MAA) - ETHYL ACRYLATE (EA) system at low conversion with 2, 2' -azobisisobutyronitrile (AIBN) as thermal initiator at 60°C in deuterated dimethyl sulfoxide (DMSO-d6) as a reaction solvent.In this case, the monomer REACTIVITY RATIOS were determined using linear off-line1H nuclear magnetic resonance spectroscopy (1H NMR) methods such as Mayo-Louis, Finemann-Ross, Inverted Finemann-Ross, Ezrielev-Brokhina-Roskin, Joshi-Joshi, Kelen-Tudos, extended Kelen- Tudos, Mao-Huglin at low and high conversions. The next estimation process in off-line 1H NMR methods were performed by applying techniques based on ordinary least square (OLS) and generalized least square (GLS).The results showed that the GLS approach compared to the OLS increased regression coefficients (R2) and the order of magnitude of parameter variances obtained from GLS was many times lower than that obtained from OLS. In addition, the monomer REACTIVITY RATIOS obtained by the Mao-Huglin method and the GLS approach showed the best linear estimation.

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APA: Copy

ASHENAGAR, SAMANEH, ZIAEE, FARSHID, JALILIAN, SEYED MEHRDAD, Shabani, Iman, MEHDIPOUR ATAEI, SHAHRAM, & ABBASSI SOURKI, FOROUD. (2017). DETERMINATION OF MONOMERS REACTIVITY RATIOS IN ETHYL ACRYLATE-METHACRYLIC ACID COPOLYMERIZATION BY OFF-LINE _{1H NMR. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 30(1 ), 31-42. SID. https://sid.ir/paper/6312/en}

Vancouver: Copy

ASHENAGAR SAMANEH, ZIAEE FARSHID, JALILIAN SEYED MEHRDAD, Shabani Iman, MEHDIPOUR ATAEI SHAHRAM, ABBASSI SOURKI FOROUD. DETERMINATION OF MONOMERS REACTIVITY RATIOS IN ETHYL ACRYLATE-METHACRYLIC ACID COPOLYMERIZATION BY OFF-LINE _{1H NMR. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2017;30(1 ):31-42. Available from: https://sid.ir/paper/6312/en}

IEEE: Copy

SAMANEH ASHENAGAR, FARSHID ZIAEE, SEYED MEHRDAD JALILIAN, Iman Shabani, SHAHRAM MEHDIPOUR ATAEI, and FOROUD ABBASSI SOURKI, “DETERMINATION OF MONOMERS REACTIVITY RATIOS IN ETHYL ACRYLATE-METHACRYLIC ACID COPOLYMERIZATION BY OFF-LINE _{1H NMR,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 30, no. 1 , pp. 31–42, 2017, [Online]. Available: https://sid.ir/paper/6312/en}

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