Molecular weight data for some polymer are tabulated here. Compute (a) The number-average molecular weight, and (b)

Question:

Molecular weight data for some polymer are tabulated here. Compute

(a) The number-average molecular weight, and

(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?

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Fundamentals of Materials Science and Engineering An Integrated Approach

ISBN: 978-1118061602

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Authors: David G. Rethwisch

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Question Posted: Jul 04, 2011 02:10 AM

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Molecular weight data for some polymer are tabulated here. Compute (a) The number-average molecular weight, and (b)

Question:

Molecular Weight Range g/mol Wi 15,000-30,000 0.04 0.01 0.07 30,000-45,000 0.04 0.11 45,000-60,000 0.16 60,000-75,000 0.26 0.24 75,000-90,000 0.27 0.24 0.16 0.12 90,000–105,000 105,000-120,000 0.08 0.12 120,000–135,000 0.03 0.05

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a From the tabulated data we are asked to compute the numberaverage molecular weight This is carried out be Molecular wt Range Mean M i x i x i M i 15...View the full answer

Fundamentals of Materials Science and Engineering An Integrated Approach

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