Naslov
High-resolution ultrasonic spectroscopy: looking at the interpolyelectrolyte neutralization from a different perspective

Autori
Klačić, Tin ; Jugl, Adam ; Pekar, Miloslav ; Kovačević, Davor

Izvornik
Macromolecules (0024-9297) 56 (2023), 4; 1434-1445

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
polyelectrolyte complexes ; ion-specific effect ; high-resolution ultrasound spectroscopy ; compressibility

Sažetak
In this study, high-resolution ultrasonic spectroscopy (HR-US) technique was applied to examine interpolyelectrolyte neutralization. The mentioned method was tested on the example of complexation between poly(allylammonium) cation and poly(acrylate) anion in aqueous solutions at pH = 7. It was confirmed by HR-US that the type of titration (stepwise or abrupt), the direction of titration, and the type of background salt affect the outcome of interpolyelectrolyte neutralization. The obtained results were explained on the basis of ultrasonic velocity and attenuation changes in the context of suspension compressibility, a parameter that is extremely sensitive to the molecular organization and intermolecular interactions. Moreover, the results of HR-US measurements proved to be consistent with previous results obtained by using more traditional methods such as DLS, microcalorimetry, and electrokinetics. This research demonstrates that HR-US is a convenient and reliable method that can be employed for the investigation of interpolyelectrolyte neutralization and polyelectrolyte-related processes.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA