Browsing by Author "Gargallo G., Ligia"

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    2-vinylpyuidine-co-N-vinyl-2-pyurolidone and 4-vinylpyridine-co-N-vinyl-2-pyrrolidone copolymers: Synthesis and reactivity ratios
    (1998) Gatica Olivares, Nicolás Marcos; Gargallo G., Ligia; Radić Foschino, Deodato D.
    Copolymers containing 2-vinylpyridine (2VPy) and 4-vinylpyridine (4VPy) with N-vinyl-2-pyrrolidone (VP) (2VPy-co-VP and 4VPy-co-VP, respectively) were synthesized and characterized. Copolymers with different compositions were obtained. The reactivity ratios were estimated by using the classical Finemann-Ross and Kelen Tudos linear procedures. These parameters were also estimated by using a computer program based on a non-linear minimization algorithm (NLMA), starting from the values of r(1) and r(2) obtained by the above linear procedures. Random copolymers with zones containing vinylpyridine blocks were obtained. (C) 1998 SCI.