Q2/ Determine the weight and number average molecular weights as well as degree of polymerization for the polypropylene materials. Number Range of Molecular weight in gram/mol and weight fractions X₁ Wi 8000- 16000 0.05 0.02 16000- 24000 0.16 0.1 24000- 32000 0.24 0.2 32000- 40000 0.28 0.3 40000- 48000 0.20 0.27 48000- 56000 0.07 0.11

Q2/ Determine the weight and number average molecular weights as well as degree of polymerization for the polypropylene materials. Number Range of Molecular weight in gram/mol and weight fractions X₁ Wi 8000- 16000 0.05 0.02 16000- 24000 0.16 0.1 24000- 32000 0.24 0.2 32000- 40000 0.28 0.3 40000- 48000 0.20 0.27 48000- 56000 0.07 0.11

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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A composite material consists of 60% glass fibre by volume (V₁ = 0.6). Half of the fibre is in unidirectional (0°) roving form and the other half is continuous fibre (0°, 90°) mat. The matrix is polyester. The properties of the constituent materials are shown in Table 4. Table 4 Density (Mg.m³) Tensile modulus (GPa) Tensile strength (MPa) Fibre 2.6 69 1200 i. Calculate the density of the composite material Matrix 1.1 2 35 ii. Calculate the tensile strength, oc, and the tensile modulus, Ec, of the composite in the 0° and 90° directions using the simple "rule of mixtures" approach.
The answer is one of the options below please solve carefully and circle the correct option Please write clear .
Questions d-f
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)
There are 4 classifications of structural molecular characteristics of polymers - Linear, Network, Crosslinked. What is the final type? Answer: