An unknown polymer sample was found to have the following molecular weight distribution:Molecular weight range8,000 - 20,00020,000 - 32,00032,000 - 44,00044,000 - 56,00056,000 - 68,00068,000 -80,00080,000 - 92,0000.03Knowing that the monomer is methyl methacrylate, which of the below is the number average degree of polymerization for this polymer sample?Select one:O a.O b. DP 476O C.DP = 338DP = 664O d. DP 544O e. DP = 801Xi0.050.150.210.280.180.10Wi0.020.080.170.290.230.160.05

The DOP tells us the number of monomer units in the given polymerization reaction.

An unknown polymer sample was found to have the following molecular weight distribution: Molecular weight range 8,000 - 20,000 20,000 -32,000 32,000 - 44,000 44,000 - 56,000 0.23 56,000-68,000 0.16 68,000-80,000 80,000 - 92,000 0.03 0.05 Knowing that the monomer is methyl methacrylate, which of the below is the number average degree of polymerization for this polymer sample? Xi 0.05 0.15 0.21 0.28 0.18 0.10 Wi 0.02 0.08 0.17 0.29

An unknown polymer sample was found to have the following molecular weight distribution: Molecular weight range 8,000 - 20,000 20,000 -32,000 32,000 - 44,000 44,000 - 56,000 0.23 56,000-68,000 0.16 68,000-80,000 80,000 - 92,000 0.03 0.05 Knowing that the monomer is methyl methacrylate, which of the below is the number average degree of polymerization for this polymer sample? Xi 0.05 0.15 0.21 0.28 0.18 0.10 Wi 0.02 0.08 0.17 0.29

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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An unknown polymer sample was found to have the following molecular weight distribution: Molecular weight range Xi Wi 8,000 – 20,000 0.05 0.02 20,000 – 32,000 0.15 0.08 32,000 – 44,000 0.21 0.17 44,000 – 56,000 0.28 0.29 56,000 – 68,000 0.18 0.23 68,000 – 80,000 0.10 0.16 80,000 - 92,000 0.03 0.05 What would the weight average molecular weight of the sample be if, we had filtered the monomer mixture with a 44 kDa dialysis tubing before preparation? (Hint: a dialysis tubing of a known molecular weight, only keeps molecules larger than that size)