Naslov
Molecular interactions and the miscibility of poly(alkyl methacrylates) blends from solution with cellulose nanocrystals

Autori
Sušac, Kristina ; Vidović, Elvira ; Jukić, Ante

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
XIV Meeting of Young Chemical Engineers Book of Abstracts / Žižek, Krunoslav ; Katančić, Zvonimir ; Kovačić, Marin - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2022, 191-191

Skup
XIV. susret mladih kemijskih inženjera (SMLKI 2022)

Mjesto i datum
Zagreb, Hrvatska, 24.02.2022. - 25.02.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
polymer blends ; interactions ; methacrylates ; cellulose nanocrystals

Sažetak
Polymer macromolecules in polymer blends interact by forming strong intermolecular bonds or inter-segment forces usually via hydrogen bonds or between strong dipoles. Polymer blends, whether prepared from polymer melt or solution, are mostly immiscible at the molecular level due to their large molecular mass. The preparation of polymer blends lead to the formation of physical interactions between macromolecules. Such interactions are often localized in a specific area of the polymer macromolecule depending on the present functional groups. The phase behavior in polymer blends, which can be binary, ternary or more, can be modeled using the Flory- Huggins thermodynamic approach. Since we know that the mixture enthalpy is caused by the interactions between the different segments, the polymer-polymer interactions can be predicted by calculating the Gibbs free energy of mixing (ΔGm). Poly(methyl methacrylate) (PMMA), poly(butyl methacrylate) (PBMA), poly(hexyl methacrylate) (PHMA) were synthesized by free- radical solution polymerization. Gel permeation chromatography (GPC) was used to determine the relative molecular weight of the synthesized polymers which was used to calculate the Gibbs free energy of mixing. The obtained polymers were dissolved in a common solvent to form a polymer blend. Cellulose nanocrystals were then added to the prepared polymer blends to observe whether cellulose had any effect on the interactions and on the thermal properties, which were monitored by differential scanning calorimetry (DSC). The results showed that the addition of PBMA or PHMA to the PMMA with cellulose nanocrystals changed the interactions of the polymer blends.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Temeljne tehničke znanosti, Interdisciplinarne tehničke znanosti

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