Abstract
Chain transfer causes recurrence cycles—restoring the concentration of primary radicals in next generations and the subsequent repeated growth of macroradicals. The chain growth in the absence of chain transfer corresponds to movement along the chain-length coordinate of the first-generation wave packet, and packets with a time lag depending on the chain length of previously formed macroradicals appear in the recurrence cycles. The superposition of lagged packets is compared with the Loschmidt echo arising in quantum systems due to transitions between the initial state and the reservoir. A method is proposed for separating the concentrations of first-generation macroradicals and echoes, and the echo age (mean time lag) depending on the chain length has been found.
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Kim, I.P., Kats, E.I. & Benderskii, V.A. Kinetics of Radical Chain Polymerization: 3. Restoring the Concentration of Macroradicals via Chain Transfer. High Energy Chem 54, 1–9 (2020). https://doi.org/10.1134/S0018143920010087
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DOI: https://doi.org/10.1134/S0018143920010087