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Open AccessArticle

Improvement of PBAT Processability and Mechanical Performance by Blending with Pine Resin Derivatives for Injection Moulding Rigid Packaging with Enhanced Hydrophobicity

1
Instituto de Tecnología de Materiales, Universitat Politècnica de València (UPV), 03801 Alcoy-Alicante, Spain
2
Departamento de Ciencia de Alimentos y Biotecnología, Facultad de Ingeniería Química y Agroindustria, Escuela Politécnica Nacional (EPN), Quito 170517, Ecuador
3
Departamento de Ingeniería Química Industrial y del Medio Ambiente, Escuela Politécnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid (ETSII-UPM), Calle José Gutiérrez Abascal 2, 28006 Madrid, Spain
4
Grupo de Investigación: Polímeros, Caracterización y Aplicaciones (POLCA), 28006 Madrid, Spain
*
Authors to whom correspondence should be addressed.
Polymers 2020, 12(12), 2891; https://doi.org/10.3390/polym12122891
Received: 7 November 2020 / Revised: 27 November 2020 / Accepted: 1 December 2020 / Published: 2 December 2020
(This article belongs to the Special Issue Sustainable Plastics for Active/Intelligent Food Packaging)
Polybutylene adipate-co-terephthalate (PBAT) is a biodegradable polymer with good features for packaging applications. However, the mechanical performance and high prices of PBAT limit its current usage at the commercial level. To improve the properties and reduce the cost of PBAT, pine resin derivatives, gum rosin (GR) and pentaerythritol ester of GR (UT), were proposed as sustainable additives. For this purpose, PBAT was blended with 5, 10, and 15 wt.% of additives by melt-extrusion followed by injection moulding. The overall performance of the formulations was assessed by tensile test, microstructural, thermal, and dynamic mechanical thermal analysis. The results showed that although good miscibility of both resins with PBAT matrix was achieved, GR in 10 wt.% showed better interfacial adhesion with the PBAT matrix than UT. The thermal characterization suggested that GR and UT reduce PBAT melting enthalpy and enhance its thermal stability, improving PBAT processability. A 10 wt.% of GR significantly increased the tensile properties of PBAT, while a 15 wt.% of UT maintained PBAT tensile performance. The obtained materials showed higher hydrophobicity than neat PBAT. Thus, GR and UT demonstrated that they are advantageous additives for PBAT–resin compounding for rigid food packaging which are easy to process and adequate for industrial scalability. At the same time, they enhance its mechanical and hydrophobic performance. View Full-Text
Keywords: polybutylene adipate-co-terephthalate (PBAT); pine resin; gum rosin; blends; compatibility effect; plasticizing effect; hydrophobicity; packaging polybutylene adipate-co-terephthalate (PBAT); pine resin; gum rosin; blends; compatibility effect; plasticizing effect; hydrophobicity; packaging
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MDPI and ACS Style

Pavon, C.; Aldas, M.; Rosa-Ramírez, H.d.l.; López-Martínez, J.; Arrieta, M.P. Improvement of PBAT Processability and Mechanical Performance by Blending with Pine Resin Derivatives for Injection Moulding Rigid Packaging with Enhanced Hydrophobicity. Polymers 2020, 12, 2891. https://doi.org/10.3390/polym12122891

AMA Style

Pavon C, Aldas M, Rosa-Ramírez Hdl, López-Martínez J, Arrieta MP. Improvement of PBAT Processability and Mechanical Performance by Blending with Pine Resin Derivatives for Injection Moulding Rigid Packaging with Enhanced Hydrophobicity. Polymers. 2020; 12(12):2891. https://doi.org/10.3390/polym12122891

Chicago/Turabian Style

Pavon, Cristina; Aldas, Miguel; Rosa-Ramírez, Harrison d.l.; López-Martínez, Juan; Arrieta, Marina P. 2020. "Improvement of PBAT Processability and Mechanical Performance by Blending with Pine Resin Derivatives for Injection Moulding Rigid Packaging with Enhanced Hydrophobicity" Polymers 12, no. 12: 2891. https://doi.org/10.3390/polym12122891

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