Question: The tensile strength and number-average molecular weight for two polyethylene materials are as follows: Tensile Strength (MPa) __________ Number-Average Molecular Weight (g/mol) 90 ......................................................................... 20,000

The tensile strength and number-average molecular weight for two polyethylene materials are as follows:

Tensile Strength (MPa) __________ Number-Average Molecular Weight (g/mol)

90 ......................................................................... 20,000

180 ........................................................................ 40,000

Estimate the number-average molecular weight that is required to give a tensile strength of 140 MPa?

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