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Prof. Ashutosh Tiwari, Editor-in-Chief has been honoured Scientists with Adv Mater Lett Award 2013.

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A New Statistical Point Of View To Choose A Better Linear Model For Reactivity And Microstructure Analysis In HEMA/furfuryl Acrylate Copolymerization Process

Gaston Fuentes Estevez, Oscar Valdes Lizama, Dionisio Zaldivar Silva, Lissette Aguero, Issa Katime

Volume 4, Issue 7, Page 534-542 | DOI: 10.5185/amlett.2012.10441

Keywords: Copolymer; monomer reactivity; microstructure parameters; furfuryl acrylate; HEMA.

Abstract: 

Copolymers of 2–hydroxyethyl methacrylate (E) and furfuryl acrylate (A) were prepared by free radical polymerization in toluene at 80°C using benzoyl peroxide as initiator. Copolymers were analyzed by 1H–NMR in order to calculate the monomer composition in the copolymer. The monomer reactivity ratios were determined by four linear methods, Fineman–Röss, r1 = 1.33/r2 = 0.96; Fineman–Röss inverted, r1 = 1.27/r2 = 0.92; Kelen–Tüdos, r1 = 1.3/r2 = 0.96 and Kelen–Tüdos extended, r1 = 0.9982/r2 = 1.0004. Akaike Information Criterion was used to select the best r1r2 pair of values. Dyads and triads confirm the average chain and copolymers type and lead to use a mathematical relationship to calculate a new r1r2 par of values. The new values were r1 = 1.254/r2 = 1.08 from the dyads and r1 = 1.26/r2 = 1.07 from the triads. Other microstructure parameters such as run number (RN = 46.48, X = 1, one A units triads) and Qe values for A, not reported before (e2 = 0.10 and Q2 = 1.68) were calculated. Copyright © 2013 VBRI press.

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