| dc.creator | BARRAZA,RAUL G. | |
| dc.creator | OLEA,ANDRES F. | |
| dc.creator | FUENTES,IRMA | |
| dc.creator | MARTINEZ,FRANCISCO | |
| dc.date | 2003-03-01 | |
| dc.date.accessioned | 2019-11-14T12:55:19Z | |
| dc.date.available | 2019-11-14T12:55:19Z | |
| dc.identifier | https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0717-97072003000100012 | |
| dc.identifier.uri | https://revistaschilenas.uchile.cl/handle/2250/117070 | |
| dc.description | Measurements of the electrical equivalent conductivity of potassium salts of poly(maleic acid-co-1-olefins), PA-nK2 with n = 12, 18 has been carried out in methanol-water mixtures in the whole range of composition. The relative interaction parameter f*, was determined as a function of the mole fraction of methanol. The values of f* do not follow the same tendency of the limiting equivalent conductivity. This unusual behavior was rationalized in terms of a methanol-induced conformational transition that takes the polymer chain from a compact to an expanded structure. As a consequence of this transition the average charge distance in the polyion increases with increasing mole fraction of methanol. This brings about a decrease of the linear charge density parameter, and therefore an increase of the fraction of polymer charges dissociated from their counterions. The existence of the conformational transition of the PA-nK2 copolymers was confirmed through fluorescence probing experiments | |
| dc.format | text/html | |
| dc.language | en | |
| dc.publisher | Sociedad Chilena de Química | |
| dc.relation | 10.4067/S0717-97072003000100012 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.source | Journal of the Chilean Chemical Society v.48 n.1 2003 | |
| dc.subject | Polyelectrolytes | |
| dc.subject | electrical conductivity | |
| dc.subject | counterion condensation | |
| dc.subject | conformational transition | |
| dc.title | ELECTRICAL CONDUCTIVITY OF HYDROPHOBICALLY MODIFIED POLYELECTROLYTES IN METHANOL/WATER SOLUTION | |
