Multifractal signatures of light-driven self-organization in acrylated epoxidized soybean oil polymers
Year: 2024
Type: article
Abstract: Multifractal properties of acrylated epoxidized soybean oil with and without a photoinitiator have been investigated. Using multifractal detrended fluctuation analysis, the photopolymerization process is analyzed by varying illumination duration and intensity. The research is conducted in two stages: the results concerning temperature fluctuations of the entire photoirradiation process are initially presented followed by a sliding window procedure to monitor system complexity during light cycling. Various multifractal mea-sures including the generalized Hurst exponent h(q), the multifractal Rényi exponent τ(q), the generalized fractal dimensions D(q) with the left and right side curvature (ΔDL, ΔDR), the multifractal singularity exponents α, the multifractal spectrum f (α), and the multifractal heat capacity C(q) with its integrated characteristic Carea are examined for both initial and shuffled series. The empirical results demonstrate that the moments of switching on and switching off photoirradiation are characterized by an instantaneous increase in the degree of multifractality of the system. It is hypothesized that the observed increase in multi-fractality at the light-switching-on/off stages is indicative of a quasi-phase transition, which may be associated with the transformation of orientational defects in the polymer network.
Institutions: Ben-Gurion University of the Negev, State institution "South Ukrainian National Pedagogical University named after K. D. Ushynsky", Kryvyi Rih State Pedagogical University, Slovak Academy of Sciences, Institute of Physics of the Slovak Academy of Sciences, Comenius University Bratislava, Polymer Institute of the Slovak Academy of Sciences, Drohobych Ivan Franko State Pedagogical University, Kazakh-British Technical University
Language: English
Subfield: Economics and Econometrics
Domain: Social Sciences
Open Access status: diamond
Awards: Zmeny mikroštruktúry a fyzikálnych vlastností zosieťovaných polymérov v objeme a v uväznených podmienkach makro- a mezopórov, G2314803536, G2623128305, G2975900969, Fyzikálne vlastnosti uväznenej vody v prostredí lipidových dvojvrstiev a vplyv kryoprotektív, G4357514893, G4937468798, G50960453, G5377789772, G6504581595, European network for developing new horizons for RIs, G8082984295, G8139692357
OpenAlex ID: W4402837071