Use of IR technology for characterization of high-density polypropylene and polyethylene mixture for post-consumer materials
DOI:
https://doi.org/10.25044/25392190.1065Keywords:
quantification , calibration curve , High Density Polyethylene (HDPE) , Polypropylene mixturesAbstract
In this work, the construction of a calibration curve is carried out to quantify the content of HDPE in mixtures with polypropylene. The analyzes were carried out in a Fourier Transform infrared spectrophotometer model: Spectrum Two S/N: C115753. First, the spectra of polypropylene and high-density polyethylene were analyzed to identify the quantification bands of the components. Once the quantification bands were identified, PE and PP mixtures were made using a pigment dispersing equipment (DRAIS), in concentrations from 10% to 100% in 10% intervals, taking 3 replicates for each concentration. Two calibration curves were built, the first with concentrations between 10 and 50% HDPE and the second with concentrations between 50 and 100% HDPE. The analysis of the results showed that for the curve between 10 and 50% of HDPE a correlation of 0.9744 was obtained, the samples with the highest deviation were at a concentration of 10% with ∆ = 8.4% average. On the other hand, for the curve built in the interval from 50% to 100% HDPE, a correlation of 0.9989 was obtained, obtaining a graph with good linearity, therefore, for this second analysis, a better prediction was obtained between the theoretical and experimental values.
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