Effect of ionizing radiation applied to PLA used as compatibilizing agent in reinforced eGG shell PBAT/PLA bio-based composites
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2021
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Journal of Research Updates in Polymer Science
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Bio-filler from eggshells as reinforcement of bio-based polymers are based on their benefits as adequate
strength and stiffness, besides friendly, degradable and renewable environment. Eggshell is an agricultural waste
considered as garbage, contributing to pollution; nevertheless, it can be transformed into bio-calcium carbonate,
acquiring new values. As biodegradable polymers, there were chosen PLA (poly-lactic-acid) and PBAT (butylene adipate
co-terephthalate), thermoplastics capable to be processed via conventional methods. PLA is a linear, aliphatic
thermoplastic polyester, high in strength and modulus, but brittle. PBAT is a synthetic polymer, very flexible, based on
fossil resources with high elongation at break, but low strength. It will be required the use of compatibilizers, for reducing
interfacial tension exhibited by PLA/PBAT immiscible blend, considering their extreme glass transition temperatures: 62 °
C for PLA and – 30 ° C for PBAT. Herein it was used ionizing radiation for inducing compatibilization by free radicals,
improving dispersion and adhesion of blend phases, without using chemical additives, at room temperature. PLA, acting
as compatibilizer, was previously e-beam and gamma radiated, at 150 kGy. PBAT/PLA 50/50 blend with 15 phr of biofiller
from avian eggs 125 μm particle size and both compatibilizers were homogeneized in a co-rotating twin-screw
extruder, within a temperature profile 120 to 145 ° C, from hopper to die. Characterization involved: Differential Scanning
Calorimeter, Thermogravimetric Analyses, Fourier Transform Infrared Spectroscopy, Wide Angle X-Ray Diffraction,
Tensile Strength and Elongation at Break.
Como referenciar
CARDOSO, ELIZABETH C.L.; PARRA, DUCLERC F.; SCAGLIUSI, SANDRA R.; KOMATSU, L.G.H.; LUGAO, ADEMAR B. Effect of ionizing radiation applied to PLA used as compatibilizing agent in reinforced eGG shell PBAT/PLA bio-based composites. Journal of Research Updates in Polymer Science, v. 10, p. 27-33, 2021. DOI: 10.6000/1929-5995.2021.10.4. Disponível em: http://repositorio.ipen.br/handle/123456789/32038. Acesso em: 13 May 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.