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Title:Vpliv akrilatov na strukturo kopolimernih mrež akrilat/tiol
Authors:ID Raner, Anja (Author)
ID Krajnc, Peter (Mentor) More about this mentor... New window
ID Paljevac, Muzafera (Comentor)
Files:.pdf UN_Raner_Anja_2017.pdf (7,12 MB)
MD5: BB961643C46F6152B81B5C8CD6323C00
PID: 20.500.12556/dkum/887bb050-1b60-4f0a-8877-66a49d993dd9
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:V okviru diplomske naloge smo preučevali vpliv akrilatov, kot so 1,6-heksandiol diakrilat, divinil adipat, etilen glikol dimetakrilat, trimetilol propan triakrilat, na tvorbo poroznih kopolimernih materialov po principu tiol-en klik polimerizacije, z uporabo emulzij z visokim deležem notranje faze. Zanimalo nas je, kako se spreminjata struktura mrež in poroznost monolitov, glede na uporabo posameznega akrilata, ter kakšna je stabilnost emulzij. Pripravili smo HIP emulzije, pri katerih smo kot monomera s tiolnimi skupinami uporabili pentaeritritol tetrakis(3-merkatopropionat) oz. trimetilol propan tris(3-merkatopropionat) in kot akrilatne monomere z vinilnimi skupinami 1,6-heksandiol diakrilat, divinil adipat, etilen glikol dimetakrilat, trimetilol propan triakrilat. Pri pripravi emulzije z visokim deležem notranje faze smo variirali z uporabo različnih akrilatnih monomerov ter deleža vodne faze. Surfaktant (Pluronic L121) in iniciator (Irgacure 819) sta bila v primeru vseh emulzij enaka, enaki so bili tudi pogoji fotopolimerizacije ter hitrost mešanja emulzije. Rezultat so bile stabilne emulzije, ki po fotopolimerizaciji vse niso tvorile tipične poliHIPE strukture. Z vrstično elektronsko mikroskopijo smo preučili morfologijo vzorcev in v nekaterih primerih opazili pojav fazne inverzije. Materiale smo analizirali tudi z uporabo FTIR spektroskopije in elementne analize ter s pomočjo teh dveh metod preučili kemijsko sestavo monolitov, saj nas je zanimala vsebnost žvepla v vzorcu. Analiza nam je pokazala, da med teoretičnimi vrednostmi in vrednostmi pridobljenih z analizo, ne pride do bistvenih odstopanj. Opravili smo tudi analizo poroznosti po principu adsorpcije/desorpcije plina po BET metodi. S pomočjo masne bilance smo izračunali tudi izkoristek polimerizacije. Zanimalo nas je, zakaj je prišlo do fazne inverzije ter zakaj, kljub stabilnim emulzijam in uspešni polimerizaciji, nismo dobili tipičnih poliHIPE struktur.
Keywords:polimer, emulzija z visokim deležem notranje faze, tiol-en klik polimerizacija, poliHIPE, fazna inverzija
Place of publishing:Maribor
Publisher:[A. Raner]
Year of publishing:2017
PID:20.500.12556/DKUM-67009 New window
UDC:661.742.14:544.773.3(043.2)
COBISS.SI-ID:21033750 New window
NUK URN:URN:SI:UM:DK:VGJYRUKZ
Publication date in DKUM:14.09.2017
Views:1597
Downloads:244
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:24.07.2017

Secondary language

Language:English
Title:Acrylate effect on structure of acrylate/thiol copolymer networks
Abstract:In this diploma thesis we studied the influence of acrylates, such as 1,6-hexanediol diacrylate, divinil adipate, ethylene glycol dimethacrylate, trimethylol propane triacrylate, on the formation of porous copolymer materials according to the principle of thiol-ene click polymerization, using high internal phase emulsions. We have been interested in how the structure of networks and porosity of the monoliths is changing, depending on the use of individual acrylates, and whether the emulsions are stable. We prepared HIP emulsions in which we used different monomers, such as pentaerythritol tetrakis (3-mercatopropionate) and trimethylol propane tris (3-mercatopropionate) as a source of thiol, and the acrylic monomers with vinyl groups such as 1,6-hexanediol diacrylate, divinil adipate, ethylene glycol dimethacrylate and trimethylol propane triacrylate. During the preparation of the emulsions with a high internal phase we varied the volume of internal phase and studied how those changes affected the properties of the monoliths. Surfactant (Pluronic L121) and initiator (Irgacure 819) were the same in the case of all emulsions; the same were also the conditions of photo polymerisation and the mixing rate of the emulsion. The results were stable emulsions, which after photo polymerization, in all cases did not form a typical polyHIPE structures. Using line electron microscopy we studied the morphology of the samples, and in some cases we observed the phenomenon of phase inversion. The materials were also analysed using FTIR spectroscopy and elemental analysis, to study the chemical composition, because we were interested in the sulphur content in the sample. The analysis showed us that there are no significant deviations between the theoretical values and the values obtained from the analysis. We also analysed the porosity by determining specific surface by the BET method and with the use of mass balance, we calculated the yield of polymerization. We were interested in why phase inversion occurred, and why, despite stable emulsions and successful polymerization, we did not get a typical polyHIPE structures.
Keywords:Polymer, HIP emulsions, thiol-ene click polymerization, polyHIPE, phase inversion


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