| Autor: |
Gutierrez-Montiel, Edith, Ávila-Orta, Carlos Alberto, Cabrera-Canales, Zaira Esmeralda, Covarrubias-Gordillo, Carlos Andrés, Reyes-Rodríguez, Pamela Yajaira, Rodríguez-Velázquez, Jesús Gilberto, Cabello-Romero, Judith Nazareth, Fonseca-Florido, Heidi Andrea |
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| Zdroj: |
Polymer Bulletin; Feb2024, Vol. 81 Issue 3, p2525-2544, 20p |
| Abstrakt: |
Global growing concern on plastics disposal and their environmental impact has impulsed the development of lower impact biodegradable plastics, however their functional properties and processability are still limited. In this study, thermoplastic starch (TPS) was synthetized through reactive extrusion (REX) to obtain single oxidized thermoplastic (O-TPS) and single maleated thermoplastic (MA-TPS), as well as, dual (oxidized-maleated thermoplastic (O-MA-TPS) modified starches aiming to incorporate new functionalities, diminish the viscosity and improve TPS processability. Spectroscopic analysis showed different band intensities as a result of TPS modification. TPS presented B-type and V-type crystal structures. O-MA-TPS showed the lowest percentage of crystallinity and complex viscosity values compared to single modified TPS because the combination of modifications. The specific mechanical energy decreased with respect to chemical modifications of starch (TPS > O-TPS > MA-TPS > O-MA-TPS), which were associated with the diminishing of viscosity resulting from the modification and starch-glycerol interactions. These starches can be incorporated into mixtures with other plastic polymers, by allowing better mixing (minor viscosity difference) and the replacement of a greater amount of plastic with TPS or in applications where a TPS with lower viscosity and easier processability is required. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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