Fig. 5: Theoretical calculations.

a Methanolysis of PA6 model dimer and cascade cyclization. b DFT energy profile of the methanolysis of Dimer-1. c DFT energy profile of 1a cyclization.

a Methanolysis of PA6 model dimer and cascade cyclization. b DFT energy profile of the methanolysis of Dimer-1. c DFT energy profile of 1a cyclization.