Calculate the number-average molecular weight of a random nitrile rubber [poly(acrylonitrile-butadiene) copolymer] in which the fraction...
Calculate the number-average molecular weight of a random nitrile rubber [poly(acrylonitrile-butadiene) copolymer] in which the fraction of butadiene repeat units is 0.32; assume that this concentration corresponds to a degree of polymerization of 2030. Calculate the molecular weight of the acrylonitrile repeat unit in g/mol.
Part 2 Calculate the molecular weight of the butadiene repeat unit in g/mol.
Part 3 Calculate the average molecular weight of the copolymer repeat unit in g/mol. Click here to access Table 4.5. m = g/mol
Part 4 What is the number average molecular weight in g/mol of this copolymer? g/mol
Homework Answers
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Calculate the number-average molecular weight of a random
nitrile rubber [poly(acrylonitrile-butadiene) copolymer] in which
the fraction...
Please zoom in for the first part Calculate the number-average molecular weight of a random nitrile...
Please zoom in for the first part
Calculate the number-average molecular weight of a random nitrile rubber [polyacrylonitrile-butadiene) copolymer] in which the fraction of butadiene repeat units is 0.31: assume that this cancentration corresponds to a degree af polymerization of 2000. ? Part1 Calculate the molecular welght of the acrylonitrile repeat unit in a/mol click here to access Iable 14.5 Atomic weights for several elements are included in the following table Carbon12.01 g/mal Chlorine 35.45 g/mal Fluorine 19.00 a/mol Hydrogen...
8.a) A random poly(styrene-butadiene) copolymer has a weight-average molecular weight of 467,500 g/mol and a weight-average...
8.a) A random poly(styrene-butadiene) copolymer has a weight-average molecular weight of 467,500 g/mol and a weight-average degree of polymerization of 5500. Calculate the fraction of styrene (C:Hg) and butadiene (C4H6) mers in this copolymer. Atomic weights: C-12, H-1 b) What weight % sulphur must be added to vulcanize polyisoprene (mer weight = 68) by crosslinking one half the possible sites. In this elastomer, each pair of mers has two possible crosslink sites. Assume three sulphur atoms are involved in each...
3 8.a) A random poly(styrene-butadiene) copolymer has a weight-average molecular weight of 467,500 g/mol and a...
3 8.a) A random poly(styrene-butadiene) copolymer has a weight-average molecular weight of 467,500 g/mol and a weight-average degree of polymerization of 5500. Calculate the fraction of styrene (CsHg) and butadiene (C4H6) mers in this copolymer. Atomic weights: C-12, H-1 b) What weight % sulphur must be added to vulcanize polyisoprene (mer weight = 68) by crosslinking one half the possible sites. In this elastomer, each pair of mers has two possible crosslink sites. Assume three sulphur atoms are involved in...
The number-average molecular weight of a poly(styrene-butadlene) alternating copolymer Is 1352000 g/mol. For each molecule of...
The number-average molecular weight of a poly(styrene-butadlene) alternating copolymer Is 1352000 g/mol. For each molecule of this copolymer determine the average number of repeat units of styrene butadiene Atomic weights for several elements are included in the following table: Carbon 12.01 g/mol Chlorine 35.45 g/mol Fluorine 19.00 g/mol Hydrogen 1.008 g/mol Oxygen 16.00 g/mol Nitrogen 14.01 g/mol styrene repeat units butadiene repeat units
calculate the number average molecular weight of a copolymer erm Remmaining Time 13:27:41 Calculate the number-average...
calculate the number average molecular weight of a
copolymer
erm Remmaining Time 13:27:41 Calculate the number-average molecular weight of a copolymer of butadiene and dimethylsilaxane in which 1/5 of the repeat units are butadiene, and the rest are dimethylsilacane. Assume the number-average degree of polymerization is 101.500. 8.01E6 amu 9.53E6 amu 7.12E6 amu O 6.66E6 amu Cuit & Save Back Question Menu SUbmit Assgnment
Consider the following two polymeric systems: A. Poly(styrene-butadiene) amorphous copolymer having a number-average molecular weight of...
Consider the following two polymeric systems: A. Poly(styrene-butadiene) amorphous copolymer having a number-average molecular weight of 50,000 g/mol, and 8% of the available sites crosslinked. B. Poly(styrene-butadiene) amorphous copolymer having a number-average molecular weight of 200,000 g/mol, and 20% of the available sites crosslinked. Respond to the following questions and justify your answer. a) Which polymer will display the highest stiffness? Why? (2 points) b) Which polymer will display the highest tensile strength? Why? (2 points) c) Consider that polymer...
Please solve this problem step by step and explain all variables! A random poly(isobutylene-isoprene) copolymer has...
Please solve this problem step by step and explain all
variables!
A random poly(isobutylene-isoprene) copolymer has a number- average molecular weight of 201000 g/mol and a degree of polymerization of 3020. Compute the fraction of isobutylene and isoprene repeat units in this copolymer. mib = 4AC + 8AH = (4)(12.01 g/mol) + (8)(1.008 g/mol) = 56.10 g/mol mip = (5)(12.01 g/mol) + (8)(1.008 g/mol) = 68.11 g/mol m=filmib + fip Mip fip = 1 - fib
Q1. The following data was reported for the fractionation of a polyester made from sebacic acid...
Q1. The following data was reported for the fractionation of a polyester made from sebacic acid and 1,6-hexanediol. (10 marks) Molecular weight range (g/mol) Fractions 8000-16000 16000-24000 24000-32000 32 40000-48000 48000-56000 0.05 0.16 0.24 0.28 0.20 0.07 (I)Draw the structure of the monomers and the polymer. (II)Identify the repeat unit (II) Identify the functionality of the monomers (IV) Evaluate Mn, Mw and the D (V)Calculate the degree of polymerization of the polymer Q2. A polymer mixture is prepared by mixing...
An alternating copolymer is known to have a number-average molecular weight of 250,000 g/mol and a...
An alternating copolymer is known to have a number-average molecular weight of 250,000 g/mol and a number-average degree of polymerization of 3406. One of the alternating mers is polystyrene which has a molecular weight of 105_g/mol. Given that the molecular weight of polypropylene is 42 g/mol and that of polyvinyl chloride is 61.5 g/mol, Which of them is the other alternating mer?
4 (20 Points) Calculate the number-average molecular weight and the weight average molecular weight of a...
4 (20 Points) Calculate the number-average molecular weight and the weight average molecular weight of a polymer sample made of polystyrene with a repeat unit of (CH2- CH(CHs)) and composed of two types of chains. 60 percent of the chains have a degree of polymerization of 7,000 and the rest 50,000. Carbon has an atomic weight of 12 g/mol and hydrogen is 1 g/mol.
Please zoom in for the first part
Calculate the number-average molecular weight of a random nitrile rubber [polyacrylonitrile-butadiene) copolymer] in which the fraction of butadiene repeat units is 0.31: assume that this cancentration corresponds to a degree af polymerization of 2000. ? Part1 Calculate the molecular welght of the acrylonitrile repeat unit in a/mol click here to access Iable 14.5 Atomic weights for several elements are included in the following table Carbon12.01 g/mal Chlorine 35.45 g/mal Fluorine 19.00 a/mol Hydrogen...
8.a) A random poly(styrene-butadiene) copolymer has a weight-average molecular weight of 467,500 g/mol and a weight-average degree of polymerization of 5500. Calculate the fraction of styrene (C:Hg) and butadiene (C4H6) mers in this copolymer. Atomic weights: C-12, H-1 b) What weight % sulphur must be added to vulcanize polyisoprene (mer weight = 68) by crosslinking one half the possible sites. In this elastomer, each pair of mers has two possible crosslink sites. Assume three sulphur atoms are involved in each...
3 8.a) A random poly(styrene-butadiene) copolymer has a weight-average molecular weight of 467,500 g/mol and a weight-average degree of polymerization of 5500. Calculate the fraction of styrene (CsHg) and butadiene (C4H6) mers in this copolymer. Atomic weights: C-12, H-1 b) What weight % sulphur must be added to vulcanize polyisoprene (mer weight = 68) by crosslinking one half the possible sites. In this elastomer, each pair of mers has two possible crosslink sites. Assume three sulphur atoms are involved in...
The number-average molecular weight of a poly(styrene-butadlene) alternating copolymer Is 1352000 g/mol. For each molecule of this copolymer determine the average number of repeat units of styrene butadiene Atomic weights for several elements are included in the following table: Carbon 12.01 g/mol Chlorine 35.45 g/mol Fluorine 19.00 g/mol Hydrogen 1.008 g/mol Oxygen 16.00 g/mol Nitrogen 14.01 g/mol styrene repeat units butadiene repeat units
calculate the number average molecular weight of a
copolymer
erm Remmaining Time 13:27:41 Calculate the number-average molecular weight of a copolymer of butadiene and dimethylsilaxane in which 1/5 of the repeat units are butadiene, and the rest are dimethylsilacane. Assume the number-average degree of polymerization is 101.500. 8.01E6 amu 9.53E6 amu 7.12E6 amu O 6.66E6 amu Cuit & Save Back Question Menu SUbmit Assgnment
Consider the following two polymeric systems: A. Poly(styrene-butadiene) amorphous copolymer having a number-average molecular weight of 50,000 g/mol, and 8% of the available sites crosslinked. B. Poly(styrene-butadiene) amorphous copolymer having a number-average molecular weight of 200,000 g/mol, and 20% of the available sites crosslinked. Respond to the following questions and justify your answer. a) Which polymer will display the highest stiffness? Why? (2 points) b) Which polymer will display the highest tensile strength? Why? (2 points) c) Consider that polymer...
Please solve this problem step by step and explain all
variables!
A random poly(isobutylene-isoprene) copolymer has a number- average molecular weight of 201000 g/mol and a degree of polymerization of 3020. Compute the fraction of isobutylene and isoprene repeat units in this copolymer. mib = 4AC + 8AH = (4)(12.01 g/mol) + (8)(1.008 g/mol) = 56.10 g/mol mip = (5)(12.01 g/mol) + (8)(1.008 g/mol) = 68.11 g/mol m=filmib + fip Mip fip = 1 - fib
Q1. The following data was reported for the fractionation of a polyester made from sebacic acid and 1,6-hexanediol. (10 marks) Molecular weight range (g/mol) Fractions 8000-16000 16000-24000 24000-32000 32 40000-48000 48000-56000 0.05 0.16 0.24 0.28 0.20 0.07 (I)Draw the structure of the monomers and the polymer. (II)Identify the repeat unit (II) Identify the functionality of the monomers (IV) Evaluate Mn, Mw and the D (V)Calculate the degree of polymerization of the polymer Q2. A polymer mixture is prepared by mixing...
An alternating copolymer is known to have a number-average molecular weight of 250,000 g/mol and a number-average degree of polymerization of 3406. One of the alternating mers is polystyrene which has a molecular weight of 105_g/mol. Given that the molecular weight of polypropylene is 42 g/mol and that of polyvinyl chloride is 61.5 g/mol, Which of them is the other alternating mer?
4 (20 Points) Calculate the number-average molecular weight and the weight average molecular weight of a polymer sample made of polystyrene with a repeat unit of (CH2- CH(CHs)) and composed of two types of chains. 60 percent of the chains have a degree of polymerization of 7,000 and the rest 50,000. Carbon has an atomic weight of 12 g/mol and hydrogen is 1 g/mol.
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