A polymer synthesized with step growth kinetics has a polydispersity of 1.75 and a weight average...
A polymer synthesized with step growth kinetics has a polydispersity of 1.75 and a weight average molecular weight of 78,000, what is the number average molecular weight of the polymer. If the molecular mass of the monomer residue unit is 102, what is the number average degree of polymerization?
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A polymer synthesized with step growth kinetics has a
polydispersity of 1.75 and a weight average...
Molecular weight data for some polymer are tabulated. Determine: a) The number-average molecular weight b) The...
Molecular weight data for some polymer are tabulated.
Determine:
a) The number-average molecular weight
b) The weight-average molecular weight
c) What is the number-average degree of polymerization for this
polymer?
d) What is the weight-average degree of polymerization for this
polymer?
Side note: Please
consider the monomer C3H6
Molecular weight data for some polymer are tabulated. Determine: The number-average molecular weight The weight-average molecular weight What is the number-average degree of polymerization for this polymer? What is the weight-average degree...
It is desired to prepare polyester with the number average molecular weight, Mn 5000 g/mol by...
It is desired to prepare polyester with the number average molecular weight, Mn 5000 g/mol by reacting of 1 mol butane-1,4 diol (HO-CH-CH2-CH2-CH2-OH) with 1 mol of adipic acid (HOOC-CH2-CH2-CH2-CH2-COOH) (a) Write chemical equation illustrating synthesis of the polyester. (b) Calculate the value of the monomer conversion at which the reaction should be stopped to obtain this polymer, assuming perfect stoichiometric balance. What would be polydispersity index for the polymer obtained? (c) Assuming that 0.5 mol % of the diol...
Polystyrene can be polymerized from the starting monomer (styrene) pictured below. a. Anionic polymerization is one...
Polystyrene can be polymerized from the starting monomer
(styrene) pictured below.
a. Anionic polymerization is one method of polymerization that
can be used to generate polystyrene from styrene. Explain what type
of initiator should be used for this reaction
and draw an example of a styrene monomer that has reacted with
initiator.
b. Using this anionic polymerization method and a starting
concentration of 1M styrene and 1mM initiator, what degree of
polymerization (Xn) would you expect if you use up...
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.
For the polymer listed, given the mass range in (g/mol) and Ni (number fraction) and wi(weight...
For the polymer listed, given the mass range in (g/mol) and Ni (number fraction) and wi(weight fraction). Compute the number - average molecular weight for the polymer. Calculate the weight - average molecular weight for the polymer The degree of polymerization of for the polymer listed. Molecular Weight Data Table for = Poly (vinyl chloride) (PVC) - = Molecular Wt(g/mol)|----xi--- |-- wi - = 8,000 - 16,000 -------|-- 0.06 --|-- 0.02 - = 16,000 - 24,000 ------|--0.14 --|-- 0.1 -...
2. (4 pts) Poly(vinyl alcohol) (PVA) is a commercially available polymer that can be synthesized by chain-growth polyme...
2. (4 pts) Poly(vinyl alcohol) (PVA) is a commercially available polymer that can be synthesized by chain-growth polymerizations. However, using the vinyl alcohol monomer does not work. » AIBN , tit Он 65°С No polymerization! a) Briefly explain why vinyl alcohol doesn't work for this polymerization. What compound would form in the scheme shown above? b) Propose an alternate route to the synthesis of PVA.
polymer question A polystyrene sample is made by mixing two types of polystyrene chains. The weight
polymer question A polystyrene sample is made by mixing two types of polystyrene chains. The weight fractions of each type are the same. The degree of polymerization of the first chain type is 96, for the second is 192. What is the number average molecular weight of this mixture?
a) compute the repeat unit molecular weight of polystyrene b) compute the number-average molecular weight for...
a) compute the repeat unit molecular weight of
polystyrene
b) compute the number-average molecular weight for
polystyrene for which the degree of polymerization is 26,000.
54 (a) Compute the repeat unit molecular weight of polystyrene. (b) Compute the number-average molecular weight for a polystyrene for which the degree of polymerization is 26,000.
i) Which of the following is not true about step-growth polymers? Formation of step-growth polymers usually...
i) Which of the following is not true about step-growth polymers? Formation of step-growth polymers usually results in the loss of a small molecule. Step-growth polymers are formed by the reaction of bifunctional molecules. Step-growth polymers can be formed by a free radical mechanism. Step-growth polymers are also known as condensation polymers. Step-growth polymers do not reach high molecular weight until the reaction has gone nearly to completion. ii) Which of the following are not termination methods in radical polymerization?...
full work pls and answer the whole question pls nber-average and weight-average molecular weight. Is it possible to...
full work pls and answer the whole question pls
nber-average and weight-average molecular weight. Is it possible to have a polypropylene polymer with the following molecular weight data and a num degree of polymerization of 1134? Why or why not? Molecular Weight Range (g/mol) 8000-20000 W 0.02 0.05 20000-32000 0.08 0.15 32000-44000 0.17 0.21 44000-56000 0.29 0.28 56000-68000 0.23 0.18 68000-80000 0.16 0.10 80000-92000 0.05 0.03 The chemical formula for the polypropylene monomer is C3H6. The atomic weights of carbon...
Molecular weight data for some polymer are tabulated.
Determine:
a) The number-average molecular weight
b) The weight-average molecular weight
c) What is the number-average degree of polymerization for this
polymer?
d) What is the weight-average degree of polymerization for this
polymer?
Side note: Please
consider the monomer C3H6
Molecular weight data for some polymer are tabulated. Determine: The number-average molecular weight The weight-average molecular weight What is the number-average degree of polymerization for this polymer? What is the weight-average degree...
It is desired to prepare polyester with the number average molecular weight, Mn 5000 g/mol by reacting of 1 mol butane-1,4 diol (HO-CH-CH2-CH2-CH2-OH) with 1 mol of adipic acid (HOOC-CH2-CH2-CH2-CH2-COOH) (a) Write chemical equation illustrating synthesis of the polyester. (b) Calculate the value of the monomer conversion at which the reaction should be stopped to obtain this polymer, assuming perfect stoichiometric balance. What would be polydispersity index for the polymer obtained? (c) Assuming that 0.5 mol % of the diol...
Polystyrene can be polymerized from the starting monomer
(styrene) pictured below.
a. Anionic polymerization is one method of polymerization that
can be used to generate polystyrene from styrene. Explain what type
of initiator should be used for this reaction
and draw an example of a styrene monomer that has reacted with
initiator.
b. Using this anionic polymerization method and a starting
concentration of 1M styrene and 1mM initiator, what degree of
polymerization (Xn) would you expect if you use up...
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.
2. (4 pts) Poly(vinyl alcohol) (PVA) is a commercially available polymer that can be synthesized by chain-growth polymerizations. However, using the vinyl alcohol monomer does not work. » AIBN , tit Он 65°С No polymerization! a) Briefly explain why vinyl alcohol doesn't work for this polymerization. What compound would form in the scheme shown above? b) Propose an alternate route to the synthesis of PVA.
a) compute the repeat unit molecular weight of
polystyrene
b) compute the number-average molecular weight for
polystyrene for which the degree of polymerization is 26,000.
54 (a) Compute the repeat unit molecular weight of polystyrene. (b) Compute the number-average molecular weight for a polystyrene for which the degree of polymerization is 26,000.
full work pls and answer the whole question pls
nber-average and weight-average molecular weight. Is it possible to have a polypropylene polymer with the following molecular weight data and a num degree of polymerization of 1134? Why or why not? Molecular Weight Range (g/mol) 8000-20000 W 0.02 0.05 20000-32000 0.08 0.15 32000-44000 0.17 0.21 44000-56000 0.29 0.28 56000-68000 0.23 0.18 68000-80000 0.16 0.10 80000-92000 0.05 0.03 The chemical formula for the polypropylene monomer is C3H6. The atomic weights of carbon...
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