UV polimerizacija pirola na reometru

Hafner, Luka (avtor), Alič, Branko (mentor)

V diplomskem delu sem preučeval možnost UV polimerizacije pirola in spremljanje le-te na reometru. Ker pirol samostojno ne polimerizira, sem mu dodal jodonijevo sol, in sicer bis(4-terc-butilfenil)jodonijev heksafluorofosfat, ki pod UV svetlobo sproži oksidativno polimerizacijo pirola v polipirol. Pripravil sem referenčno zmes 2-hidroksietilmetakrilata (2-HEMA), etanola in fotoiniciatorja tipa I (Genocure LTM ali MBF), ji dodal pirol in jodonijevo sol ter reakcijo spremljal z oscilacijsko reometrijo (G′, G″, tan δ) in FTIR-spektroskopijo pri UV valovnih dolžinah 365 in 405 nm. Ugotovil sem, da je polimerizacija pirola uspešno potekla ob prisotnosti jodonijeve soli, vendar je imela negativen vpliv na samo polimerizacijo 2-HEMA. Polimerizacija 2-HEMA je ob prisotnosti polimerizacije pirola potekala počasneje, kar je bilo razvidno iz počasnejšega naraščanja kompleksne viskoznosti in obeh modulov tekom reoloških meritev. S FTIR-analizo pa sem tudi ugotovil, da kljub daljšemu času UV obsevanja reakcijske zmesi s prisotnim pirolom je del 2-HEMA ostal nezreagiran.

• Jezik: Slovenski jezik
• Ključne besede: pirol, jodonijeva sol, 2-HEMA, UV-fotopolimerizacija, oscilacijska reometrija
• Vrsta gradiva: Diplomsko delo/naloga
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Leto izida: 2026
• PID: 20.500.12556/RUL-187176
• Datum objave v RUL: 09.09.2026

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: UV polymerization of pyrrole on a rheometer

Izvleček

In this thesis, I investigated the possibility of UV polymerization of pyrrole and monitored this process using a rheometer. Since pyrrole does not polymerize on its own, I added an iodonium salt, namely bis(4-tert-butylphenyl)iodonium hexafluorophosphate, which under UV light initiates the oxidative polymerization of pyrrole into polypyrrole. I prepared a reference mixture of 2-hydroxyethyl methacrylate (2-HEMA), ethanol, and a type I photoinitiator (Genocure LTM or MBF), added pyrrole and the iodonium salt to it, and monitored the reaction using oscillatory rheometry (G′, G″, tan δ) and FTIR spectroscopy at UV wavelengths of 365 and 405 nm. I found that the polymerization of pyrrole proceeded successfully in the presence of the iodonium salt; however, it had a negative effect on the polymerization of 2-HEMA itself. In the presence of pyrrole polymerization, the polymerization of 2-HEMA proceeded more slowly, which was evident from the slower increase in complex viscosity and both moduli during the rheological measurements. FTIR analysis also showed that, despite a longer UV irradiation time of the reaction mixture containing pyrrole, a portion of the 2-HEMA remained unreacted.

• Ključne besede: pyrrole, iodonium salt, 2-HEMA, UV photopolymerisation, oscillatory rheometry