Molecular weight data for some polymer are tabulated here. Compute (a) the number-average molecular weight, (b) the weight-average molecular weight. (c) If it is known that this material's degree of polymerization is 710, which one of the polymers listed in Table 14.3 is this polymer? Why? Molecular Weight Range g/mol 15,000-30,000 Xi Wi 0.04 0.01 30,000-45,000 0.07 0.04 45,000-60,000 0.16 0.11 60,000-75,000 0.26 0.24 75,000-90,000 0.24 0.27 90,000–105,000 0.12 0.16 105,000-120,000 0.08 0.12 120,000-135,000 0.03 0.05

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Molecular weight data for some polymer are tabulated here. Compute (a) the number-average
molecular weight, (b) the weight-average molecular weight. (c) If it is known that this material's degree of
polymerization is 710, which one of the polymers listed in Table 14.3 is this polymer? Why?
Molecular Weight
Range g/mol
15,000-30,000
Xi
Wi
0.04
0.01
30,000-45,000
0.07
0.04
45,000-60,000
0.16
0.11
60,000-75,000
0.26
0.24
75,000-90,000
0.24
0.27
90,000–105,000
0.12
0.16
105,000-120,000
0.08
0.12
120,000-135,000
0.03
0.05
Transcribed Image Text:Molecular weight data for some polymer are tabulated here. Compute (a) the number-average molecular weight, (b) the weight-average molecular weight. (c) If it is known that this material's degree of polymerization is 710, which one of the polymers listed in Table 14.3 is this polymer? Why? Molecular Weight Range g/mol 15,000-30,000 Xi Wi 0.04 0.01 30,000-45,000 0.07 0.04 45,000-60,000 0.16 0.11 60,000-75,000 0.26 0.24 75,000-90,000 0.24 0.27 90,000–105,000 0.12 0.16 105,000-120,000 0.08 0.12 120,000-135,000 0.03 0.05
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