caa a22 4500 378903330 CHVBK 20180305123523.0 cr unu---uuuuu 161128e20041201xx s 000 0 eng 10.1515/epoly.2004.4.1.408 doi (NATIONALLICENCE)gruyter-10.1515/epoly.2004.4.1.408 Metastable state of amphiphilic polysaccharide solutions [Elektronische Daten] [Sébastien Simon, Georgeta Mocanu, Luc Picton, Didier Le Cerf, Guy Muller] This communication reports the time-dependent viscometric behaviour of amphiphilic pullulan (with varied amount of grafted octyl groups, C8) solutions as a function of age and temperature. For lower C8 amount, no ageing effects were observed. With high amount of octyl-bearing groups, the solution exhibits a strong increase of viscosity caused by an increase of intermolecular associations and the simultaneous decrease of intramolecular associations. After longer time, a collapse of chains has been observed. This behaviour is favoured with concentration and temperature. These results evidence the metastable character of amphiphilic polymers in aqueous solution. © 2013 by Walter de Gruyter GmbH & Co. Simon Sébastien Laboratoire Polymères, Biopolymères, Membranes U.M.R. 6522, CNRS-Université de Rouen, 76821 Mont-Saint-Aignan, France; Fax +33 235 14 65 43 aut Mocanu Georgeta ‘Petru Poni' Institute of Macromolecular Chemistry, 6600 Iasi, Romania; Fax +40 232 211 299 aut Picton Luc Laboratoire Polymères, Biopolymères, Membranes U.M.R. 6522, CNRS-Université de Rouen, 76821 Mont-Saint-Aignan, France; Fax +33 235 14 65 43 aut Le Cerf Didier Laboratoire Polymères, Biopolymères, Membranes U.M.R. 6522, CNRS-Université de Rouen, 76821 Mont-Saint-Aignan, France; Fax +33 235 14 65 43 aut Muller Guy Laboratoire Polymères, Biopolymères, Membranes U.M.R. 6522, CNRS-Université de Rouen, 76821 Mont-Saint-Aignan, France; Fax +33 235 14 65 43 aut e-Polymers De Gruyter 4/1(2004-12-01), 408-413 2197-4586 4:1<408 2004 4 epoly https://doi.org/10.1515/epoly.2004.4.1.408 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/epoly.2004.4.1.408 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Simon Sébastien Laboratoire Polymères, Biopolymères, Membranes U.M.R. 6522, CNRS-Université de Rouen, 76821 Mont-Saint-Aignan, France; Fax +33 235 14 65 43 aut NATIONALLICENCE 700 1- Mocanu Georgeta ‘Petru Poni' Institute of Macromolecular Chemistry, 6600 Iasi, Romania; Fax +40 232 211 299 aut NATIONALLICENCE 700 1- Picton Luc Laboratoire Polymères, Biopolymères, Membranes U.M.R. 6522, CNRS-Université de Rouen, 76821 Mont-Saint-Aignan, France; Fax +33 235 14 65 43 aut NATIONALLICENCE 700 1- Le Cerf Didier Laboratoire Polymères, Biopolymères, Membranes U.M.R. 6522, CNRS-Université de Rouen, 76821 Mont-Saint-Aignan, France; Fax +33 235 14 65 43 aut NATIONALLICENCE 700 1- Muller Guy Laboratoire Polymères, Biopolymères, Membranes U.M.R. 6522, CNRS-Université de Rouen, 76821 Mont-Saint-Aignan, France; Fax +33 235 14 65 43 aut NATIONALLICENCE 773 0- e-Polymers De Gruyter 4/1(2004-12-01), 408-413 2197-4586 4:1<408 2004 4 epoly CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter