Your browser does not support JavaScript!

Doctoral theses

Current Record: 221 of 230

Back to Results Previous page
Next page
Add to Basket
[Add to Basket]
Identifier 000022102
Title Μελέτη της μικροδομής και της δυναμικής συνθετικών και βιολογικών πολυμερών σε διάλυμα και στερεά κατάσταση με τη φασματοσκοπία πυρηνικού μαγνητικού συντονισμού του πυρήνα 13C
Alternative Title Study of the microstructure and dynamics of synthetic and biological polymers in solution and in bulk by 13C nuclear magnetic resonance spectroscopy
Author Σπύρος, Απόστολος Γ
Thesis advisor Νταής, Φώτης
Abstract The stereochemical microstructure and the dynamics of a series of poly(napthanyl alkylacrylates) [PNAA] in different solvents and the dynamical behaviour of poly(b-hydroxyoctanoate)[PHO] in the solid state are studied in this dissertation. PNAA's were synthesized by free-radical polymerization, while PHO is a thermoplastic biopolymer synthesized intracellularly by the bacteria Pseudomonas Oleovorans. The tacticity of the various PNAA's was studied by13C Nuclear Magnetic Relaxation (NMR) Spectroscopy, by using various statistical models that describe the mechanism of the polymerization reaction. The dynamic behaviour of all polymers was studied by the 13C Nuclear Magnetic Relaxation technique, as a function of magnetic field, temperature and solvent. For the interpretation of the experimental NMR data new composite dynamic models were developped in the present study. Valuable information about the nature and the rates of the different types of local motions taking place in the backbone, as well as in the side chain of the polymers was extracted. The influence of the solvent viscosity on the local dynamics was examined as well. Finally, possible correlations between the microstructure and the dynamics of PNAA's and their photophysical behaviour in solution were examined.
Language Greek
Issue date 1994-08-02
Collection   School/Department--School of Sciences and Engineering--Department of Chemistry--Doctoral theses
  Type of Work--Doctoral theses
Permanent Link https://elocus.lib.uoc.gr//dlib/2/a/8/metadata-dlib-1996spyros.tkl Bookmark and Share
Views 336

Digital Documents
No preview available

Download document
View document
Views : 8