Effect of Ionizing Radiation Applied to PLA Used as Compatibilizing Agent in Reinforced eGG Shell PBAT/PLA Bio-Based Composites

Bio-filler from eggshells as reinforcement of bio-based polymers are based on their benefits adequate strength and stiffness, besides friendly, degradable renewable environment. Eggshell is an agricultural waste considered 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) PBAT (butylene adipate co-terephthalate), thermoplastics capable processed via conventional methods. a linear, aliphatic thermoplastic polyester, high in modulus, but brittle. synthetic polymer, very flexible, fossil resources with elongation at break, low strength. It will required the use compatibilizers, for reducing interfacial tension exhibited by PLA/PBAT immiscible blend, considering extreme glass transition temperatures: 62 o C – 30 PBAT. Herein was used ionizing radiation inducing compatibilization free radicals, improving dispersion adhesion blend phases, without using chemical additives, room temperature. PLA, acting compatibilizer, previously e-beam gamma radiated, 150 kGy. PBAT/PLA 50/50 15 phr bio-filler avian eggs 125 µm particle size both compatibilizers homogeneized co-rotating twin-screw extruder, within temperature profile 120 145 C, hopper die. Characterization involved: Differential Scanning Calorimeter, Thermogravimetric Analyses, Fourier Transform Infrared Spectroscopy, Wide Angle X-Ray Diffraction, Tensile Strength Elongation Break.