caa a22 4500 475765036 CHVBK 20180406123603.0 cr unu---uuuuu 170329e20001101xx s 000 0 eng 10.1007/s003960000367 doi (NATIONALLICENCE)springer-10.1007/s003960000367 Aggregation behaviour of hydrophobically modified poly(allylammonium) chloride [Elektronische Daten] [M. J. Tiera, V. Ap. de Oliveira Tiera, E. C. de Toledo, G. L. de Sena]  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. Springer-Verlag Berlin Heidelberg, 2000 Key words Cationic amphiphilic polymers nationallicence Aggregation nationallicence Pyrene fluorescence spectroscopy nationallicence Hydrophobic microdomains nationallicence Tiera M. J. Instituto de Biociências Letras e Ciências Exatas, Departamento de Química e Geociências, UNESP São José do Rio Preto, Brazil e-mail: mjt@qeg.ibilce.unesp.br Tel.: +55-17-2212359 Fax: +55-17-2212356, BR aut Ap. de Oliveira Tiera V. Instituto de Biociências Letras e Ciências Exatas, Departamento de Química e Geociências, UNESP São José do Rio Preto, Brazil e-mail: mjt@qeg.ibilce.unesp.br Tel.: +55-17-2212359 Fax: +55-17-2212356, BR aut de Toledo E. C. Instituto de Biociências Letras e Ciências Exatas, Departamento de Química e Geociências, UNESP São José do Rio Preto, Brazil e-mail: mjt@qeg.ibilce.unesp.br Tel.: +55-17-2212359 Fax: +55-17-2212356, BR aut de Sena G. L. Universidade Federal do Espirito Santo Departamento de Química, UFES Espirito Santo, Brazil, BR aut https://doi.org/10.1007/s003960000367 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s003960000367 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tiera M. J. Instituto de Biociências Letras e Ciências Exatas, Departamento de Química e Geociências, UNESP São José do Rio Preto, Brazil e-mail: mjt@qeg.ibilce.unesp.br Tel.: +55-17-2212359 Fax: +55-17-2212356, BR aut NATIONALLICENCE 700 1- Ap. de Oliveira Tiera V. Instituto de Biociências Letras e Ciências Exatas, Departamento de Química e Geociências, UNESP São José do Rio Preto, Brazil e-mail: mjt@qeg.ibilce.unesp.br Tel.: +55-17-2212359 Fax: +55-17-2212356, BR aut NATIONALLICENCE 700 1- de Toledo E. C. Instituto de Biociências Letras e Ciências Exatas, Departamento de Química e Geociências, UNESP São José do Rio Preto, Brazil e-mail: mjt@qeg.ibilce.unesp.br Tel.: +55-17-2212359 Fax: +55-17-2212356, BR aut NATIONALLICENCE 700 1- de Sena G. L. Universidade Federal do Espirito Santo Departamento de Química, UFES Espirito Santo, Brazil, BR aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer