Assertion: polypropylene's density | /r/HasProperty | polyethylene
Facets:
Source sentences:
text: The modeling found that the three polymers with the lowest density — polyethylene, polypropylene and expanded polystyrene — accumulate on the surface of the lake while the other six polymers were concentrated in the sediment.
text: The modeling found that the three polymers with the lowest density — polyethylene, polypropylene and expanded polystyrene — accumulate on the surface of the lake while the other six polymers were concentrated in the sediment.