Papers by Keyword: PLA Composites

Abstract: Making a product from design to finished product is difficult and time consuming job in conventional manufacturing process but in additive manufacturing (AM) it is an easy process. In AM technologies Fused Deposition Modeling (FDM) is an important printing technology to produce components using thermos plastics. Up to date AM technologies are used to make parts in single material, by using this additive manufacturing sandwich parts can be fabricated to improve flexural property of the material. A lightweight core and two thin solid face sheets with strong flexural rigidity at the top and bottom make up sandwich constructions. Sandwich structures have a core that can be developed and updated to meet our needs, which offers up new possibilities in a variety of disciplines. This method can be done with a variety of filaments, PLA having properties such as biodegradability, lack of disagreeable odor when heated, and usual environmental compatibility throughout its life cycle. PLA also produces 10 times less potentially harmful ultra-fine particles than Acrylonitrile Butadiene Styrene. This article concentrated review on PLA and PLA composite materials to improve flexural property

Abstract: In this study, we present the manufacturing process of two new composites materials in the form of long fibers of polylactic-acid (PLA) or polypropylene (PP), reinforced by cellulose whiskers micro-fibers loads. In order to evaluate the mechanical properties of these advanced materials, a several uniaxial tensile tests were carried out. The PP and the PLA have initially been spinning without the addition of cellulose whiskers micro-fibers. In order to study the effects of cellulose whiskers micro-fibers reinforcements in the Mechanical behavior of the PLA and PP filaments, we determinate the proprieties of these advanced material from the tensile results. For the PP composite filaments material case, the whiskers reinforcement increases Young's modulus and failure resistance, but it reduces the limit strength failure. For the PLA composites the addition of 1% wt of cellulose whiskers from the total volume fraction of the material, increase the Young’s modulus more than 50% and a decrease of the failure resistance and the limit strength of composite. The obtained composites fibers are very rigid and brittle. What follows, that the addition of cellulose whiskers micro fibers in PP matrix, provides mechanical properties more convenient compared to the PLA matrix.

Abstract: Polylactic acid (PLA) and natural rubber (NR) were melt blended with vetiver grass fiber using an internal mixer. Heat treatment at the temperature of 180°C was done to obtain heat treated vetiver grass fiber. Glycidyl methacrylate grafted natural rubber (NR-g-GMA) was used as a compatibilizer of PLA/vetiver/NR composites. The injection molding and compression molding were used to prepare the specimens. Molecular weight determination of PLA before and after processing was done by Gel Permeable Chromatography (GPC).Comparisons between the mechanical properties of the composites prepared from injection molding and compression molding were made.