calculate the square of the solubility parameter difference between low density polyethylene and each of the polymers such as polyethylene, HDPE, PVC$,$ LDPE, Polypropylene, polystyrene and polycarbonateon. On the basis of solubility parameter difference, list the recycling code polymers in order $($good mixing to poor mixing$)$ of how well they would mix with low density polyethylene.