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

Gastón Fuentes Estevez1, Oscar Valdés Lizama1, Dionisio Zaldívar Silva1, Lissette Agüero1, Issa Katime2*

1Centro de Biomateriales, Universidad de La Habana, Ave Universidad. e/ G y Ronda, Vedado, Ciudad de La Habana, 10400, Cuba

2Grupo Nuevos Materiales y Espectroscopia Supramolecular, Facultad de Ciencia y Tecnología. 48080, Bilbao, España

Adv. Mater. Lett., 2013, Current Issue, 4 (7), pp 534-542

DOI: 10.5185/amlett.2012.10441

Publication Date (Web): May 01, 2013

E-mail: issa.katime@ehu.es

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 r1–r2 pair of values. Dyads and triads confirm the average chain and copolymers type and lead to use a mathematical relationship to calculate a new r1–r2 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 Q–e values for A, not reported before (e2 = 0.10 and Q2 = 1.68) were calculated.

Keywords

Copolymer, monomer reactivity, microstructure parameters, furfuryl acrylate, HEMA.

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