I have come across some high-fidelity and low-fidelity potentials like ReaxFF, AIREBO and OPLS that can be used for polymers in general. I want to understand which is the most commonly used potentials for PTFE simulation in LAMMPS and if one is suitable for PTFE-Ice simulations. Do they need to be created from scratch using calculations or do references/repositories exist like for alloy potentials?