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Autori: Brunchi C.E., Bercea M, Morariu S
Editorial: e-Polymers, no. 065, p.1-10, 2009.
The viscometric behaviour of polyacrylonitrile solutions in dimethylformamide has been examined in different regimes of concentration. For semidilute and concentrated solutions, viscoelastic properties were determined and discussed. The viscosity – concentration curves show some specific behaviours for polyacrylonitrile solutions at very low and high concentrations. The overlap concentration was evidenced as being the crossover of two scaling laws characterizing the particle solution and network solution regimes.
Cuvinte cheie: polyacrylonitrile solution, viscosity, overlap concentration