An alternating poly(ethylene-styrene) copolymer has a molecular weight of 97,917 g/mol. How many styrene repeat units...
An alternating poly(ethylene-styrene) copolymer has a molecular weight of 97,917 g/mol. How many styrene repeat units are in one average chain of this polymer.
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An alternating poly(ethylene-styrene) copolymer has a molecular
weight of 97,917 g/mol. How many styrene repeat units...
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
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...
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...
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...
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?
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 =...
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
Ex. You are reverse engineering a competitors new high strength Ethylene-Acrylic Ester copolymer ...
Ex. You are reverse engineering a competitors new high strength Ethylene-Acrylic Ester copolymer sprocket for a performance gear shifter. Through experiments you determine the molecular weight of the polymer to be 13,700 g/mol and the degree of polymerization to be 243. What is the mol fraction of ethylene and acrylic ester?
Ex. You are reverse engineering a competitors new high strength Ethylene-Acrylic Ester copolymer sprocket for a performance gear shifter. Through experiments you determine the molecular weight of the polymer...
3) a) The average molecular weight Mm (g/mol) for a thermoplastic material that has the mean weig...
3) a) The average molecular weight Mm (g/mol) for a thermoplastic material that has the mean weight fractions f for the weight ranges listed in the table is: f M Molecular weight range, g/mol 5,000-10,000 10,000- 15,000 15,000-20,000 20,000-25,000 0.30 0.20 0.35 0.15 Σ fi 1.00 What is the mass of one polymer chain in grams? b)
3) a) The average molecular weight Mm (g/mol) for a thermoplastic material that has the mean weight fractions f for the weight ranges...
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...
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
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...
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...
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...
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?
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
Ex. You are reverse engineering a competitors new high strength Ethylene-Acrylic Ester copolymer sprocket for a performance gear shifter. Through experiments you determine the molecular weight of the polymer to be 13,700 g/mol and the degree of polymerization to be 243. What is the mol fraction of ethylene and acrylic ester?
Ex. You are reverse engineering a competitors new high strength Ethylene-Acrylic Ester copolymer sprocket for a performance gear shifter. Through experiments you determine the molecular weight of the polymer...
3) a) The average molecular weight Mm (g/mol) for a thermoplastic material that has the mean weight fractions f for the weight ranges listed in the table is: f M Molecular weight range, g/mol 5,000-10,000 10,000- 15,000 15,000-20,000 20,000-25,000 0.30 0.20 0.35 0.15 Σ fi 1.00 What is the mass of one polymer chain in grams? b)
3) a) The average molecular weight Mm (g/mol) for a thermoplastic material that has the mean weight fractions f for the weight ranges...
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...
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