Naslov
Interactions between Poly(Allylamine Hydrochloride) and Monovalent Anions, the Effect of Chain Length and Counterion Size

Autori
Požar, Josip ; Kovačević, Davor

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts, ECIS 2007 / - , 2007, 467-467

Skup
21st Conference of the European Colloid and Interface Society

Mjesto i datum
Ženeva, Švicarska, 10.09.2007. - 14.09.2007

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
polyelectrolytes ; ionic strength ; microcalorimetry ; potentiometry

Sažetak
Despite numerous theoretical studies on the influence of ionic conditions (ionic strength, type of electrolyte used) and chain length on polyelectrolyte charge, shape and counterion– polyelectrolyte interactions, there is still a significant lack of experimental results on the subject. In order to additionally clarify the influence of added salt on polyelectrolyte chains, microcalorimetric, potentiometric and conductometric experiments with aqueous poly(allylamine hydrochloride) solutions (PAH+Cl-) and sodium halide solutions were performed. PAH+Cl- samples of two different chain lengths were used (Mw = 70 000 g mol-1, Nm ≈ 749 ; Mw = 15 000 g mol-1, Nm ≈ 161). Different trends of enthalpy changes upon titrations of polyelectrolyte solutions with solutions of sodium halides (NaF, NaCl, NaBr, NaI) were observed. The difference in chain length of both polymers used had very little effect on the measured values of enthalpy changes (monomer concentration was held the same in microcalorimetric measurements in the case of both chain lengths). Results of potentiometric and conductometric measurements provided additional information about the charge on polyelectrolyte chains and specific counterion- polymer interactions.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA