| dc.date.accessioned |
2016-05-24T08:48:11Z |
und |
| dc.date.accessioned |
2017-10-24T12:19:21Z |
|
| dc.date.available |
2016-05-24T08:48:11Z |
und |
| dc.date.available |
2017-10-24T12:19:21Z |
|
| dc.date.issued |
2016-05-24T08:48:11Z |
|
| dc.identifier.uri |
http://radr.hulib.helsinki.fi/handle/10138.1/5509 |
und |
| dc.identifier.uri |
http://hdl.handle.net/10138.1/5509 |
|
| dc.title |
Synthesis and Aqueous Self-Assembly of Poly(2-isopropyl-2-oxazoline)-b-poly(L-lactide) Block Copolymers |
en |
| ethesis.discipline |
Polymer Chemistry |
en |
| ethesis.discipline |
Polymeerikemia |
fi |
| ethesis.discipline |
Polymerkemi |
sv |
| ethesis.discipline.URI |
http://data.hulib.helsinki.fi/id/204e19e5-dc8a-4453-be69-4c135b47a4f2 |
|
| ethesis.department.URI |
http://data.hulib.helsinki.fi/id/c2dd677c-da9c-4011-94b0-27b1585ac1cb |
|
| ethesis.department |
Kemiska institutionen |
sv |
| ethesis.department |
Department of Chemistry |
en |
| ethesis.department |
Kemian laitos |
fi |
| ethesis.faculty |
Matematisk-naturvetenskapliga fakulteten |
sv |
| ethesis.faculty |
Matemaattis-luonnontieteellinen tiedekunta |
fi |
| ethesis.faculty |
Faculty of Science |
en |
| ethesis.faculty.URI |
http://data.hulib.helsinki.fi/id/8d59209f-6614-4edd-9744-1ebdaf1d13ca |
|
| ethesis.university.URI |
http://data.hulib.helsinki.fi/id/50ae46d8-7ba9-4821-877c-c994c78b0d97 |
|
| ethesis.university |
Helsingfors universitet |
sv |
| ethesis.university |
University of Helsinki |
en |
| ethesis.university |
Helsingin yliopisto |
fi |
| dct.creator |
Sliepen, Marjolein |
|
| dct.issued |
2016 |
|
| dct.language.ISO639-2 |
eng |
|
| dct.abstract |
Self-assembled structures of poly(2-isopropyl-2-oxazoline) (PiPOx) and poly(L-lactide) (PLLA) block copolymers in water were studied by dynamic light scattering (DLS) and UV-VIS spectroscopy (UV-VIS). The block copolymers were prepared by azide-alkyne cycloaddition between PiPOx and PLLA homopolymers. The homopolymers were prepared via ring-opening polymerization (ROP) techniques. The kinetics of the cationic ROP of PiPOx was investigated. The self-assembled structures were prepared via four different methods: nanoprecipitation, solvent exchange, dialysis, and thin film rehydration. Self-assembled structures prepared from solvent exchange and dialysis had larger hydrodynamic radii than particles prepared from nanoprecipitation, due to a slower change in solvent quality. According to the Rg/Rh values, spherical structures were formed after nanoprecipitation. When the particles were heated to 50 °C, a sphere-to-rod transition took place. Self-assembled structures prepared via solvent exchange exhibited thermo-responsiveness when the PiPOx block was long enough. Surprisingly, the small structures prepared via nanoprecipitation did not show any thermo-responsiveness. |
en |
| dct.language |
en |
|
| ethesis.language.URI |
http://data.hulib.helsinki.fi/id/languages/eng |
|
| ethesis.language |
English |
en |
| ethesis.language |
englanti |
fi |
| ethesis.language |
engelska |
sv |
| ethesis.thesistype |
pro gradu-avhandlingar |
sv |
| ethesis.thesistype |
pro gradu -tutkielmat |
fi |
| ethesis.thesistype |
master's thesis |
en |
| ethesis.thesistype.URI |
http://data.hulib.helsinki.fi/id/thesistypes/mastersthesis |
|
| dct.identifier.urn |
URN:NBN:fi-fe2017112252194 |
|
| dc.type.dcmitype |
Text |
|
