dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.contributor | Universidade Federal do Espírito Santo (UFES) | |
dc.date.accessioned | 2014-05-20T15:25:14Z | |
dc.date.available | 2014-05-20T15:25:14Z | |
dc.date.created | 2014-05-20T15:25:14Z | |
dc.date.issued | 2000-11-01 | |
dc.identifier | Colloid and Polymer Science. New York: Springer-verlag, v. 278, n. 11, p. 1052-1060, 2000. | |
dc.identifier | 0303-402X | |
dc.identifier | http://hdl.handle.net/11449/35682 | |
dc.identifier | 10.1007/s003960000367 | |
dc.identifier | WOS:000165461000004 | |
dc.identifier | 8796747160088337 | |
dc.description.abstract | The behaviour of hydrophobically modified poly(allylammonium) chloride having octyl, decyl, dodecyl and hexadecyl side chains has been studied in aqueous solution using fluorescence emission techniques. Micropolarity studies using the I-1/I-3 ratio of the vibronic bands of pyrene show that the formation of hydrophobic microdomains depends on both the length of the side chain and the polymer concentration. The I-1/I-3 ratio of the polymers with low hydrophobe content (less than 5% mel) changes substantially when reaching a certain concentration. These changes are assigned to aggregation originating from interchain interactions. This behaviour is also confirmed by the behaviour of the monomer/excimer emission intensities of pyrene- dodecanoic acid used as a probe. For polymers having dodecyl side chains and hydrophobe contents higher than 10%, aggregates are formed independently of the polymer concentration. Anisotropy measurements show that microdomains resulting from the inter- and/or intramolecular interactions are similar to those observed for cationic surfactants. Viscosity measurements show that the coil dimensions are substantially decreased for the polymers having high hydrophobe contents, indicating intramolecular associations. | |
dc.language | eng | |
dc.publisher | Springer | |
dc.relation | Colloid and Polymer Science | |
dc.relation | 1.967 | |
dc.rights | Acesso restrito | |
dc.source | Web of Science | |
dc.subject | cationic amphiphilic polymers | |
dc.subject | aggregation | |
dc.subject | pyrene fluorescence spectroscopy | |
dc.subject | hydrophobic microdomains | |
dc.title | Aggregation behaviour of hydrophobically modified poly(allylammonium) chloride | |
dc.type | Artículos de revistas | |