Question
Asked Oct 24, 2019
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The following table lists molecular weight data for a polypropylene material. compute the following. 

a) the numbr-average molecular weight 

2) the weight-average molecular weight 

3) the degree of polymerization 

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Expert Answer

Step 1

The table for the calculation of number average molecular weight is given below.

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Molecular weight range Mean, Mi X,.М, Xi 8000-16000 12000 0.05 600 20000 0.18 3600 16000 - 24000 24000-32000 28000 0.24 6720 32000- 40000 0.27 36000 9720 40000- 48000 9240 44000 0.21 48000-56000 52000 0.05 2600 32480

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Step 2

The calculation of number average molecular weight (Mn) is calculated as follows:

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Step 3

The table for the calculation of weight aver...

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Chemistry

Polymers

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