Effect of temperature and plasticizer content of polypropylene and polylactic acid on migration kinetics into isooctane and 95 v/v% ethanol as alternative fatty food simulants

Effect of crystallinity on the migration of plastic additives from polylactic acid-based food contact plastics

“…Detailed process of plastic production can be found in the work of Kirchkeszner et al (2022) and Petrovics et al (2022). Briefly: polylactic acid was heated overnight at 80 • C to remove residual water from the polymer pellets.…”

“…For the quantitative analysis of the five target compounds, a gas chromatographicmass spectrometric (GC-MS) method was developed, and its analytical performance characteristics were evaluated by Petrovics et al (2022). The summary of the GC-MS analytical method can also be found in Table S1.…”

“…Kinetic curves are mostly characterized with the diffusion and partition coefficients, however, for their determination the investigated process must reach its equilibrium. When it does not happen, the dynamic ranges of kinetic curves can be characterized with the swelling and migration rates (Petrovics et al, 2022). For their determination, ASD% and c A,mig,i values were plotted as the function of square root of contact time.…”

“…Garamhegyi et al (2020) and Hatvani et al (2014) analysed the spatial autocorrelation of the level and the quality of shallow groundwater. Bodai et al (2015), Kirchkeszner et al (2022) and Petrovics et al (2022) used variography to obtain the necessary contact time to reach a steady-state. Using this method, a range could be determined beyond which the observations were uncorrelated.…”

“…Since the presence of TBAC lowered the T g of PLA, it got closer to the temperature of the experiment, which promoted crystallization. Along with T g reduction, plasticization also enhances the plastic's swelling (Petrovics et al, 2022), consequently, the solvent-induced crystallization. As a result, only 4 days were necessary to reach the equilibrium of crystallization.…”