Supplemental material

S1: (N1)-adiabatic potential of mean force for a bond. S2: Estimation of the segmental friction factor. S3: Expression of the scaled configurational integral in terms of Fourier transforms. S4: Center of mass motion of the periodic chain. S5: Energy contribution to the potential of mean force with respect to the length of a bond. S6: Quasi-harmonic approximation for the periodic unidimensional chain of Morse bonds. S7: 1-bond adiabatic approximation to the potential of mean force with respect to the length of a bond. S8: Equilibrium tension autocorrelation function. S9: Details of nonequilibrium tension relaxation calculations.