Unit:
Κατεύθυνση Επιστήμη Πολυμερών και Εφαρμογές της στη ΒιομηχανίαLibrary of the School of Science
Author:
Didaskalou Periklis
Supervisors info:
Αστέριος Πίσπας, Διευθυντής Ερευνών, Ινστιτούτο Θεωρητικής και Φυσικής Χημείας, Εθνικό Ίδρυμα Ερευνών
Original Title:
Κατιοντικοί πολυηλεκτολύτες που περίεχουν φθοριωμένες ομάδες: σύνθεση και ιδιότητες αυτοοργάνωσης σε υδατικά διαλύματα
Translated title:
Cationic polyelectrolytes containing perfluorinated groups: synthesis and self-assembly properties in aqueous solutions
Summary:
In this research the synthesis and the study of fluorinated cationic polyelectrolytes based on dimethylaminoethyl-methacrylate is presented. Dimethylamino ethyl methacrylate is a hydrophilic monomer, whose polymers, when dissolved in water they give molecular structures whose properties depend on the pH, temperature and ionic strength of the solution. The existence of hydrophobic fluorinated groups in the polymer chain will give the polymer amphiphilic properties and is expeted to affect its self-organization properties in aqueous media.
A homopolymer of poly(2-dimethylamino ethyl methacrylate) was first synthesized using the RAFT method. The introduction of the fluorinated groups in the polymer chain was done by means of a quaternization reaction of the amino group, in which heptadecafluoro-10-iododecane groups were added to the polymer chain.
The molecular characteristics of the copolymers were determined using size exclusion chromatography (SEC) and the 1H-NMR and FT-IR spectroscopic methods. The self-assembly of the copolymers in aqueous solutions along with the dependence of the properties of the resulting aggregates on the pH, temperature and ionic strength of the solution were then studied. Light scattering methods (DLS, ELS) and fluorescence spectroscopy (FS) were used for this study.
Main subject category:
Science
Keywords:
Amphiphilic statistical copolymers, RAFT polymerization, Aggregates, Polyelectrolytes, Fluorinated polymers
