In recent time, the quest for renewable materials for the development of packaging items is constantly increasing. The class of polylactic acids (PLAs) is the most promising one, although a broader scale commercial expansion of these polymers cannot leave unceasing enhancement of their functional properties aside, especially toughness and thermal stability. Similarly, continuous innovation in prototyping competitive easy-route solutions for material processing is another key to successful industrial applications of PLAs. In this respect, this study deals with the design and formulation of innovative custom-built PLAs for injection and compression molding, which are compostable, suitable for food contact, and characterized by a good compromise of mechanical properties and thermal resistance. Therefore, a commercial grade PLA was modified by reactive compounding extrusion with maleic anhydride (MAH)-grafted PLA (PLA-MA) and glycidyl methacrylate (GMA)-grafted PLA (PLA-GMA) and micro-lamellar talc. Material structure and thermal response of the compounds were evaluated by differential scanning calorimetry (DSC) and Fourier transform-infrared spectroscopy (FTIR). The experimental findings show that material structure and, especially, crystallization of the PLA can be controlled by fine-tuning the compound formulation. In addition, achievement of the appropriate crystallization degree in the polymer can lead to compostable composite materials with good thermal stability. Accordingly, the custom-built PLA formulations feature the potential to expand significantly the fields of application of compostable biopolymers, thus posing a valid alternative to both durable not compostable bioplastics and conventional plastics in injection and compression molding process.
Barletta, M., Moretti, P., Pizzi, E., Puopolo, M., Vesco, S., & Tagliaferri, V. (2018). Thermal behavior of injection- and compression-molded custom-built polylactic acids. ADVANCES IN POLYMER TECHNOLOGY, 37(5), 1444-1455 [10.1002/adv.21803].
|Tipologia:||Articolo su rivista|
|Citazione:||Barletta, M., Moretti, P., Pizzi, E., Puopolo, M., Vesco, S., & Tagliaferri, V. (2018). Thermal behavior of injection- and compression-molded custom-built polylactic acids. ADVANCES IN POLYMER TECHNOLOGY, 37(5), 1444-1455 [10.1002/adv.21803].|
|IF:||Con Impact Factor ISI|
|Settore Scientifico Disciplinare:||Settore ING-IND/16 - Tecnologie e Sistemi di Lavorazione|
|Revisione (peer review):||Esperti anonimi|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1002/adv.21803|
|Stato di pubblicazione:||Pubblicato|
|Data di pubblicazione:||2018|
|Titolo:||Thermal behavior of injection- and compression-molded custom-built polylactic acids|
|Autori:||Barletta, M; Moretti, P; Pizzi, E; Puopolo, M; Vesco, S; Tagliaferri, V|
|Appare nelle tipologie:||01 - Articolo su rivista|