Polymerization of Nylon 6,6 Explain how the two different termination steps, combination/coupling and disproportionation, affect the...
Polymerization of Nylon 6,6
Explain how the two different termination steps, combination/coupling and disproportionation, affect the molecular weight of polystyrene.
Homework Answers
Nylon 6.6 is manufactured by solution polymerization by condensing hexamethylene diamine and adipic acid in toluene solvent at higher temperature in an inert atmosphere.
nH2N-(-- CH2-)6—NH2 + n HOOC-(--CH2-)4—COOH
Hexamethylene diamine Adipic acid
?
[------NH—(--CH2-)6—NH – CO –( -CH2 -)4—CO----] n
Nylon-6,6 (polyamide)
For styrene
The propagation step is terminated when two radicals combine
together to form a neutral species, known as coupling or
combination or disproportionation, in which hydrogen transfer
results in the formation of two molecules: one saturated and one
unsaturated end group .
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Polymerization of Nylon 6,6
Explain how the two different termination steps,
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Q6. 2/2 points (a)What are the chemical formulas for the compounds below ? Are the compounds...
Q6. 2/2 points
(a)What are the chemical formulas for the compounds below ?
Are the compounds shown
below isomers?
(b) Consider the two alkene compounds below? Which one is cis,
which one is trans?
Q7. 3/3/3 points
(a) What are addition polymerization steps?
(b) What type of polymerization does the below reaction
present?
(c) Calculate the degree of polymerization if 6,6-nylon has a
molecular weight of 120,000 g/mol, two repeating unit of Nylon6,6
shown in (b).
Q8. 4 points...
This is a dry lab assessment for synthesis of Nylon 6,6. I believe I understand how...
This is a dry lab assessment for synthesis of Nylon 6,6. I
believe I understand how to calculate the limiting reagent (Q1) and
have determined it to be adipic acid. I’m stuck on calculating the
theoretical yield (Q2) and need some help getting through the
bullet points of the procedure used to answer the question.
Thanks!
1. In the experiment, you are instructed to use 0.500 g of adipic acid and 0.40 g of hexamethylenediamine. Calculate the mmol of each...
5. A hypothetical mixture of 10 monomers (AB) undergoes step-growth polymerization The following table presents a...
5. A hypothetical mixture of 10 monomers (AB) undergoes step-growth polymerization The following table presents a possible picture of how reaction might appear. (Note that A and B represent two different functional groups and ab is the product of their reaction with each other) Time Molecular species present DP AB AB AB AB AB AB AB AB AB AB 0 |АВ АВ АВ АВ АВ АВ АВ АВ АВ АВ T1 AbaB AbaB AbaB AB AB AB AB 12 AbabaB...
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Q6. 2/2 points
(a)What are the chemical formulas for the compounds below ?
Are the compounds shown
below isomers?
(b) Consider the two alkene compounds below? Which one is cis,
which one is trans?
Q7. 3/3/3 points
(a) What are addition polymerization steps?
(b) What type of polymerization does the below reaction
present?
(c) Calculate the degree of polymerization if 6,6-nylon has a
molecular weight of 120,000 g/mol, two repeating unit of Nylon6,6
shown in (b).
Q8. 4 points...
This is a dry lab assessment for synthesis of Nylon 6,6. I
believe I understand how to calculate the limiting reagent (Q1) and
have determined it to be adipic acid. I’m stuck on calculating the
theoretical yield (Q2) and need some help getting through the
bullet points of the procedure used to answer the question.
Thanks!
1. In the experiment, you are instructed to use 0.500 g of adipic acid and 0.40 g of hexamethylenediamine. Calculate the mmol of each...
5. A hypothetical mixture of 10 monomers (AB) undergoes step-growth polymerization The following table presents a possible picture of how reaction might appear. (Note that A and B represent two different functional groups and ab is the product of their reaction with each other) Time Molecular species present DP AB AB AB AB AB AB AB AB AB AB 0 |АВ АВ АВ АВ АВ АВ АВ АВ АВ АВ T1 AbaB AbaB AbaB AB AB AB AB 12 AbabaB...
Explain how the Federal Reserve uses its tools to affect Investment and consumer spending. (please outline the 3 main tools and the different 'steps' involved)
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