Below, molecular weight data for a polypropylene material are tabulated. Compute

(a) The number-average molecular weight,

(b) The weight-average molecular weight, and

(c) The degree of polymerization.

Transcribed Image Text:

Molecular Weight Range (g/mol) Xi Wi 0.02 0.05 8,000-16,000 16,000-24,000 0.16 0.10 24,000-32,000 0.24 0.20 32,000-40,000 0.28 0.30 40,000-48,000 0.20 0.27 48,000-56,000 0.07 0.11