Fall_2010_Exam 2 ChE 350_practice problems polymers mech props

Fall_2010_Exam 2 ChE 350_practice problems polymers mech props

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ChE 350 Fall 2010 (100 pts possible) Name:________________________ Exam 2 (show your work on the following pages as indicated) 1 2. The molecular weight distribution of a PMMA sample measured using a technique called thermal field flow fractionation is shown below [From J. J. Kirland, et al. Anal. Chem. (1992) ]. a chain of PMMA looks like: [atomic MW’s: of C=12 g/mol; O=16 g/mol; H=1 g/mol]. Using this data, estimate the following quantities ( M is the mean molecular weight within a size range—i.e., the mass of each molecule): (a) Molecular weight of a PMMA monomer: __________________________
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ChE 350 Fall 2010 (100 pts possible) Name:________________________ Exam 2 (show your work on the following pages as indicated) 2 (b) The weight average molecular weight of the polymer: _____________________________ (c) The number average molecular weight of the polymer: _____________________________ (d) Polydispersity index: ________________________________ (e) Based on your answer in (c), is this polymer considered relatively polydisperse or
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This note was uploaded on 12/13/2011 for the course CHE 350 taught by Professor Sanchez during the Spring '08 term at University of Texas at Austin.

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Fall_2010_Exam 2 ChE 350_practice problems polymers mech props

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