Ring Opening Polymerization using Catalytic Complexes

Doctoral Dissertation uoadl:1309285 385 Read counter

Unit:
Κατεύθυνση Επιστήμη Πολυμερών και Εφαρμογές της
Library of the School of Science
Deposit date:
2014-01-30
Year:
2014
Author:
Κούρτη Μαρία-Ευγενία
Dissertation committee:
Μαρίνος Πιτσικάλης Ομότ. Καθηγητής ΕΚΠΑ (επιβλέπων), Νικόλαος Χατζηχρηστίδης Ομότ. Καθηγητής ΕΚΠΑ, Ερμόλαος Ιατρού Αναπλ. Καθηγητής ΕΚΠΑ
Original Title:
Πολυμερισμός Διάνοιξης Δακτυλίου με χρήση Καταλυτικών Συστημάτων
Languages:
Greek
Translated title:
Ring Opening Polymerization using Catalytic Complexes
Summary:
In this thesis, the cationic ring opening polymerization (CROP) of MeOx and
PhOx was investigated using zirconium and hafnium precursor initiators in
combination with fluorinated arylborate activators. Initially, kinetic studies
experiments were conducted. It was revealed from these experiments that the
nature of the initiator and the activator greatly affect the polymerization
kinetics. Statistical and block copolymers and copolymers of MeOx and PhOx were
subsequently prepared. Measuring the reactivity ratios of MeOx and PhOx in the
statistical copolymers it was found that “pseudo” diblock copolymers were
actually prepared. The self-assembly of statistical copolymers was studied by
dynamic light scattering. In addition, thermogravimetric analysis measurements
of statistical and block copolymers were conducted. Diblock and triblock
copolymers of MeOx or PhOx with ε-caprolactone, ε-CL and ethyl vinyl ether, EVE
were also synthesized. Partial deactivation of the cationically charged first
block occurred in some cases leading to bimodal distributions. These
termination reactions were not observed during the synthesis of the triblock
copolymers, leading to monomodal distributions.
Keywords:
2-methyl-2-oxazoline, 2-phenyl-2-oxazoline, Cationic ring opening polymerization, Zirconium complexes, Diblock copolymers of 2-oxazolines
Index:
Yes
Number of index pages:
15-21, 23-24, 26-29
Contains images:
Yes
Number of references:
184
Number of pages:
209
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