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Paper Information

Journal:   IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)   APRIL-MAY 2017 , Volume 30 , Number 1 ; Page(s) 31 To 42.
 
Paper: 

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

 
 
Author(s):  ASHENAGAR SAMANEH, ZIAEE FARSHID*, JALILIAN SEYED MEHRDAD, SHABANI IMAN, MEHDIPOUR ATAEI SHAHRAM, ABBASSI SOURKI FOROUD
 
* IRAN POLYMER AND PETROCHEMICAL INSTITUTE, TEHRAN, IRAN
 
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.

 
Keyword(s): REACTIVITY RATIOS, COPOLYMERIZATION, ETHYL ACRYLATE, METHACRYLIC ACID, OFF LINE GENERALIZED LEAST SQUARE
 
 
References: 
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Click to Cite.
APA: Copy

ASHENAGAR, S., & ZIAEE, F., & JALILIAN, S., & Shabani, I., & MEHDIPOUR ATAEI, S., & ABBASSI SOURKI, F. (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. https://www.sid.ir/en/journal/ViewPaper.aspx?id=570997



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). 2017 [cited 2021May11];30(1 ):31-42. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=570997



IEEE: Copy

ASHENAGAR, S., ZIAEE, F., JALILIAN, S., Shabani, I., MEHDIPOUR ATAEI, S., ABBASSI SOURKI, F., 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), [online] 30(1 ), pp.31-42. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=570997.



 
 
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