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Most likely, the part is one of the five following polymers: polyethylene, polypropylene, polystyrene, polycarbonate, poly(vinyl chloride). These are all extremely common, and have widespread applications in industry.
Each of these polymers exhibits properties which allow it to be of unique technological importance. Theoretical values for the properties utilized in determining the identity of the unknown sample are listed in Table 1.
Density (g/cm3) Molecular Weight (g/mol) Melting Point (?C)
Polypropylene 0.905 42.08 170
Polyethylene 0.92 28.05 130-145
Polycarbonate 1.2 158 310
Polystyrene 1...
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