Effect of different plasticizers on thermal, crystalline, and permeability properties of Poly(3–hydroxybutyrate–co-3–hydroxyhexanoate)films
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Effect of different plasticizers on thermal, crystalline, and permeability properties of Poly(3–hydroxybutyrate–co-3–hydroxyhexanoate)filmsAutor(es)
Fecha
2022-08-22Cita bibliográfica
Farrag, Y.; Barral, L.; Gualillo, O.; Moncada, D.; Montero, B.; Rico, M.; Bouza, R. Effect of Different Plasticizers on Thermal, Crystalline, and Permeability Properties of Poly(3–hydroxybutyrate–co–3– hydroxyhexanoate) Films. Polymers 2022, 14, 3503. https://doi.org/ 10.3390/polym14173503
Resumen
Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) films were prepared using a cast film technique. Dioxane was chosen over other polymer solvents as it resulted in homogenous films with better morphology. Several plasticizers with different molecular weights and concentrations were added to the biopolymer solution prior to casting. Thermal, crystalline, and permeability properties were analyzed by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), and both water vapor and oxygen transmission rate analysis. In general, the addition of plasticizers decreased the glass transition temperature (Tg), cold crystallization temperatures (Tcc), melting temperatures, as well as crystallinity degrees and increased the crystallite sizes and water vapor and oxygen transmission rates. The use of isosorbide and low-molecularweight poly(ethylene glycol) (PEG) lowered the Tg around 30 C at the highest used concentration, also being the most effective in increasing the crystallite size. When considering isosorbide and low-molecular-weight poly(ethylene glycol) (PEG) as very good plasticizers for PHBH, the question of which plasticizer to use strongly relies on the desired PHBH application.
Palabras clave
PHBH
Cast films
Biopolymers
Plasticizers
Thermal properties
Permeability properties
Cast films
Biopolymers
Plasticizers
Thermal properties
Permeability properties
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Derechos
Atribución 4.0 Internacional
ISSN
2073-4360