| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Show document

Title:Vpliv akrilatov na strukturo kopolimernih mrež akrilat/tiol
Authors:Raner, Anja (Author)
Krajnc, Peter (Mentor) More about this mentor... New window
Paljevac, Muzafera (Co-mentor)
Files:.pdf UN_Raner_Anja_2017.pdf (7,12 MB)
 
Language:Slovenian
Work type:Bachelor thesis/paper (mb11)
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
Year of publishing:2017
Publisher:[A. Raner]
Source:Maribor
UDC:661.742.14:544.773.3(043.2)
COBISS_ID:21033750 Link is opened in a new window
NUK URN:URN:SI:UM:DK:VGJYRUKZ
License:CC BY-NC-ND 4.0
This work is available under this license: Creative Commons Attribution Non-Commercial No Derivatives 4.0 International
Views:413
Downloads:128
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FKKT
:
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.
Share:AddThis
AddThis uses cookies that require your consent. Edit consent...

Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

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


Comments

Leave comment

You have to log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back
Logos of partners University of Maribor University of Ljubljana University of Primorska University of Nova Gorica