Fig. 1. L-J fluid simulation system.

Fig. 2. Verification of viscosity of L-J fluid at different temperatures.

Fig. 3. Verification of the radial distribution function of L-J fluid: (a) ; (b) .

Fig. 4. Radial distribution function of L-J fluid at with different temperatures.

Fig. 5. Storage modulus and loss modulus: (a) Storage modulus and loss modulus at different temperatures; (b) viscoelastic characteristic relaxation time .

Fig. 6. , , , under different T, , ε and σ: (a) Different temperatures; (b) different densities; (c) different distances between atoms when potential is 0; (d) different potential well depths.

Fig. 7. Distribution of the dissociation or association time of L-J fluid at , ε = 1, σ = 1

Fig. 8. Schematic diagram of Kramers’ rate theory.

Fig. 9. The quantity curves of A and A—A: (a) Different temperatures; (b) different densities; (c) different distances between atoms when potential is 0; (d) different potential well depths.