6-Calculate molecular weight, weight average molecular weight, and polydispersity index for the following sample of poly (hexamethylene adipamide) or Nylon 6,6. Atomic mass carbon, hydrogen, nitrogen, and oxygen are 12.011, 1.008, 14.007, and 15.999 g/mol respectively. 田 Mol% of chains DP 27% 105000 17% 75000 24% 45000 12% 65000 20% 95000

6-Calculate molecular weight, weight average molecular weight, and polydispersity index for the following sample of poly (hexamethylene adipamide) or Nylon 6,6. Atomic mass carbon, hydrogen, nitrogen, and oxygen are 12.011, 1.008, 14.007, and 15.999 g/mol respectively. 田 Mol% of chains DP 27% 105000 17% 75000 24% 45000 12% 65000 20% 95000

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter23: Polymeric Materials And Soft Condensed Matter

Section: Chapter Questions

Problem 9P

See similar textbooks

Similar questions

(4) Describe the synthesis of plastic especially polyethylene, 1,1- dichloroethane, and polyvinyl chloride
11
1. Explain the following observations: (i) Kevlar has an extremely high tensile strength and melting temperature. (ii) At room temperature, poly(methylmethacrylate) is transparent, while polyethylene is translucent. At temperatures above 135°C, both polymers are transparent. (iii) Polyoxymethylene and polyethylene exhibit similar mechanical behavior. However, the glass transition temperature of polyoxymethylene is about 50°C higher than that of polyethylene.
1. Explain the following observations: (i) Kevlar has an extremely high tensile strength and melting temperature. (ii) At room temperature, poly(methylmethacrylate) is transparent, while polyethylene istranslucent. At temperatures above 135°C, both polymers are transparent. (iii) Polyoxymethylene and polyethylene exhibit similar mechanical behaviour. However, the glass transition temperature of polyoxymethylene is about 50°C higher than that of polyethylene.
1.Consider the polymerization of the following monomers: H2N- -NH2 (a) Draw the repeat unit of the resulting polymer. (b) Identify the two structural units comprising the repeat unit. Aramids are produced using the reaction of a benzene-1,4-diamine and a terephthaloyl dichloride. (c) Plot the Mn of the polymer vs. the extent of reaction, where the extent of reaction increases from 0 to 0.95 in intervals of 0.05, and extend the plot include data points for an extent of reaction = 0.96, 0.97, 0.98, 0.99, and 0.995. (d) What is the extent of reaction when the molecular weight reaches 30 000 g/mol? (e) State two conditions that must be ensured for a step growth polymerization to reach high conversion.
Directions: Write A if only the first statement is correct; B if only the second statement is correct; C if both statements are correct and D if both statements are wrong. 1. X- Thermoplastic materials are made of long linear polymer chain that are weakly bonded. Y- Thermoplastic and thermosets are both recyclable. 2. X - A monomer is a small repeating units that makes up a polymer. Y - All polymers are considered as plastic. 3. X- All units in a polymer need to be from the same monomer. Y- Long chain polymers are flexible.
Molecular weight data for polypropylene (PP, C3H6) are shown below. Molecular 8- 16- 24- 32- 40- 48- weight (x103 g/mol) 16 24 32 40 48 56 Number fraction 0.05 0.16 0.24 0.28 0.20 0.07 Calculate the number-average molecular weight of this polymer. 38,480 g/mol 33,040 g/mol 31,200 g/mol 30,460 g/mol 35,720 g/mol 36,240 g/mol
Which of the following three compounds:- polyethylene [essentially no vapor pressure at 1 atm]- menthone [medium vapor pressure at 1 atm]- benzoic acid [low vapor pressure at 1 atm]Is most likely to be amenable to purification by sublimation? Why
If you could please explain how you got the answer that would be amazing thank you!
5.In the polycondensation of H2N(CH2)6NH2 and HOOC(CH2)4COOH, in equimolar quantities, to form nylon-6,6 what is the molecular weight of the species that has the largest yield by weight at 99% conversion ?
1) Write a representative section of ideal network polymers formed from 3 moles of terephthalic acid and 2 moles of glycerol. terephathalic acid: HOOC glycerol: CH₂-CH-CH₂ OH OH OH -COOH
6. Molecular weight data for some polymer are tabulated. Determine: a) The number-average molecular weight The weight-average molecular weight If it is known that this material's number-average degree of b) c) polymerization is 458, which one of the polymers listed in Table 16.3 is this polymer? d) What is the weight-average degree of polymerization for this polymer? Molecular Weight Range (g/mol) X W; 8,000-20,000 20,000-32,000 32,000-44,000 44,000-56,000 56,000-68,000 68,000-80,000 0.05 0.02 0.15 0.08 0.21 0.17 0.28 0.29 0.18 0.23 0.10 0.16 80,000-92,000 0.03 0.05