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% mol) 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 pyrenedodecanoic 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.
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Received: 10 November 1999/Accepted: 7 April 2000
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Tiera, M., Ap. de Oliveira Tiera, V., de Toledo, E. et al. Aggregation behaviour of hydrophobically modified poly(allylammonium) chloride. Colloid Polym Sci 278, 1052–1060 (2000). https://doi.org/10.1007/s003960000367
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DOI: https://doi.org/10.1007/s003960000367