Molecular interactions and the miscibility of poly(alkyl methacrylates) blends from solution with cellulose nanocrystals (CROSBI ID 715874)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Sušac, Kristina ; Vidović, Elvira ; Jukić, Ante
engleski
Molecular interactions and the miscibility of poly(alkyl methacrylates) blends from solution with cellulose nanocrystals
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.
polymer blends ; interactions ; methacrylates ; cellulose nanocrystals
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Podaci o prilogu
191-191.
2022.
objavljeno
Podaci o matičnoj publikaciji
XIV Meeting of Young Chemical Engineers Book of Abstracts
Žižek, Krunoslav ; Katančić, Zvonimir ; Kovačić, Marin
Zagreb: Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI)
2718-2177
Podaci o skupu
XIV. susret mladih kemijskih inženjera (SMLKI 2022)
poster
24.02.2022-25.02.2022
Zagreb, Hrvatska
Povezanost rada
Interdisciplinarne tehničke znanosti, Kemijsko inženjerstvo, Temeljne tehničke znanosti