Unit:
Κατεύθυνση Επιστήμη Πολυμερών και Εφαρμογές τηςLibrary of the School of Science
Author:
Μαραθιανός Αρκάδιος
Supervisors info:
Μαρίνος Πιτσικάλης Καθηγητής
Original Title:
Σύνθεση και χαρακτηρισμός του πολυ(2-ακετοξυ-βινυλαιθέρα), PAcOVE, με τη χρήση του ημι-μεταλλοκενικού συμπλόκου Cp*TiMe3. Εφαρμογή του PAcOVE ως προδρόμου για τη σύνθεση εμβολιασμένων συμπολυμερών
Translated title:
Synthesis and characterization of poly(2-acetoxy-vinylether), PAcOVE, using half-metallocene Cp*TiMe3. PAcOVE as precursor for synthesis graft copolymers.
Summary:
The current survey investigates the synthesis of acetoxy-ethyl-vinylether
(AcOVE) by the phase-transfer-catalyzed substitution reaction of
2-chloro-ethyl-vinylether (CEVE) with sodium acetate. The cationic
polymerization of AcOVE was efficiently conducted using
pentamethylcyclopentadienyl trimethyltitanium, (Cp*TiMe3) in combination with
tetrakis(pentafluorophenyl)borate dimethylanilinum salt, [Me2NHPh]+[B(C6F5)4]-,
as initiation system. In addition, poly(2-chloro-ethyl-vinylether) (PCEVE) was
synthesized using bis(η5-cyclopentadienyl)dimethyl hafnium, Cp2HfMe2 in
combination with [Me2NHPh]+[B(C6F5)4]-. Random copolymer
poly(2-chloro-ethyl-vinylether-co-isobutyl-vinylether) P(CEVE-co-iBVE) was
synthesized using bis(η5-cyclopentadienyl)dimethyl hafnium, Cp2HfMe2 in
combination with [Me2NHPh]+[B(C6F5)4]. Poly(hydroxy-ethyl-vinyl ether) PHOVE
was prepared by base-catalyzed hydrolysis of AcOVE.
Furthermore, the graft copolymer P(OVE-g-St) was synthesized by atom transfer
radical polymerization.
The polymerization and the copolymerization procedures were monitored by size
exclusion chromatography (SEC) and nuclear magnetic resonance (1H-NMR). With
these methods the molecular weight of the polymers and the copolymers, the
molecular weight distribution and the composition were determined.
Keywords:
2-acetoxy-ethyl-vinylether, 2-chloro-ethyl-vinylether, Grafted copolymers, Cationic polymerization, Metallocenes
Number of index pages:
12,13,14
