Optimization of mechanical properties of a synthetic agglomerate by response surface methodology
DOI:
https://doi.org/10.29105/mdi.v12i20.324Keywords:
binders, binder, reinforcement, mechanical properties, flexural modulusAbstract
Optimization of mechanical properties of synthetic agglomerates using Response Surface Methodology (RSM) is an effective approach to optimize formulations and processes. Therefore, the objective of this work was to implement a Central Composite Design (CCD) in conjunction with an RSM for the prediction of the flexural mechanical properties of a synthetic agglomerate based on reinforced poly(lactic acid) (PLA) with natural fibers obtained from the coconut palm (Cocus nucifera L). To do this, the following independent variables were taken into account: A: fiber length (mm), B: binder concentration (%), C: thermoforming temperature (°C) and D: thermoforming pressure (kPa). The static bending elastic modulus (R1) was proposed as the response variable. Design-Expert 7.0.0 software was used to process the data. The combination of the coded levels for the independent factors, which maximizes the response variable R1 (theoretical module) is obtained when A= -2, B= -1.88, C= -2 and D= 0.21, resulting in a module elastic at bending of 474 MPa. This result was validated through a confirmatory experiment (n=5), obtaining an elastic flexural modulus of 453 MPa, very close to that obtained in the theoretical value
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