Polylactide (PLA) is the best-known biodegradable polymer. It is made from lactic acid, and its other name is poly(lactic acid). Lactic acid can be obtained, e.g., as a result of lactic whey fermentation, which is a waste from cheese production. Whey is a perishable greenish liquid with an unpleasant odor. It constitutes 65-90% of waste from the production of cheese and curd. The production of this biodegradable polymer is based on recyclable materials, and therefore, it is even more ecological. PLA can also be made
Aramid (AF), glass (GF), carbon (CF), basalt (BF), and flax (FF) fibers in the form of fabrics were used to produce the composites by hand-lay up method. The use of fabrics of similar grammage for composites’ manufacturing allowed for a comprehensive comparison of the properties of the final products. The most important task was to prepare a complex setup of mechanical and thermomechanical properties, supplemented by fire behavior analysis, and discuss both characteristics in their application range. The mechanical properties were investigated using tensile and flexural tests, as well as impact strength measurement. The investigation was improved by assessing thermomechanical properties under dynamic deformation conditions (dynamic mechanical–thermal analysis (DMTA)). All products were subjected to a fire test carried out using a cone calorimeter (CC).
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