Table of contents

1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 17m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 19m
11. Radical Reactions1h 58m
12. Alcohols, Ethers, Epoxides and Thiols2h 42m
13. Alcohols and Carbonyl Compounds2h 17m
14. Synthetic Techniques1h 26m
15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
16. Conjugated Systems6h 13m
17. Ultraviolet Spectroscopy51m
18. Aromaticity2h 34m
19. Reactions of Aromatics: EAS and Beyond5h 1m
20. Phenols55m
21. Aldehydes and Ketones: Nucleophilic Addition4h 56m
22. Carboxylic Acid Derivatives: NAS2h 51m
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m
25. Condensation Chemistry2h 9m
26. Amines1h 43m
27. Heterocycles2h 0m
28. Carbohydrates5h 53m
29. Amino Acids4h 20m
30. Peptides and Proteins2h 42m
31. Catalysis in Organic Reactions1h 30m
32. Lipids 2h 50m
33. The Organic Chemistry of Metabolic Pathways2h 52m
34. Nucleic Acids1h 32m
35. Transition Metals6h 14m
36. Synthetic Polymers1h 49m

22. Carboxylic Acid Derivatives: NAS

Carboxylic Acid Derivatives

Organic Chemistry

22. Carboxylic Acid Derivatives: NAS

Carboxylic Acid Derivatives

Previous problemNext problem

2:23 minutes

Problem 63c,d(i)

Textbook Question

The structures of four useful polymers are shown, together with some of their best-known products. In each case,
(i) determine the kind of polymer (polyamide, polyester, etc.).
(c)
(d)

Verified step by step guidance

Step 1: Analyze the first polymer structure (image 1). The repeating unit contains ester functional groups (-COO-) connecting aromatic rings. This indicates that the polymer is a polyester. Polyesters are formed through condensation reactions between diols and dicarboxylic acids.

Step 2: Note the applications of the first polymer, such as crash helmets and bulletproof 'glass'. These applications suggest that the polymer has high strength and durability, which are characteristic properties of polyesters like polycarbonate.

Step 3: Analyze the second polymer structure (image 2). The repeating unit contains amide functional groups (-CONH-) connecting aromatic rings. This indicates that the polymer is a polyamide. Polyamides are formed through condensation reactions between diamines and dicarboxylic acids.

Step 4: Note the applications of the second polymer, such as high-strength fabrics and bulletproof vests. These applications suggest that the polymer has high tensile strength and resistance to impact, which are characteristic properties of polyamides like Kevlar.

Step 5: Summarize the findings: The first polymer is a polyester, likely polycarbonate, used in crash helmets and bulletproof 'glass'. The second polymer is a polyamide, likely Kevlar, used in high-strength fabrics and bulletproof vests.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above

Video duration:

Play a video:

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Types of Polymers

Polymers can be classified into various types based on their chemical structure and properties. Common categories include polyamides, which contain amide linkages, and polyesters, characterized by ester linkages. Understanding these classifications is essential for identifying the type of polymer in a given structure, as each type has distinct characteristics and applications.

Polymerization Process

Polymerization is the chemical process through which monomers are chemically bonded to form a polymer. This can occur through addition (chain-growth) or condensation (step-growth) mechanisms. Recognizing the type of polymerization helps in understanding the formation of the polymer's structure and its resultant properties, which are crucial for applications in materials like crash helmets and bulletproof glass.

Applications of Polymers

Different polymers are utilized in various applications based on their mechanical and thermal properties. For instance, polyamides are known for their strength and durability, making them suitable for high-performance fabrics and protective gear. Understanding the relationship between a polymer's structure and its applications is vital for determining its suitability for specific uses, such as in safety equipment.

Watch next

Master Intro to Carboxylic Acid Derivatives with a bite sized video explanation from Johnny

Start learning

Related Videos

Related Practice

Textbook Question

Show how you would accomplish the following multistep syntheses, using the indicated starting material and any necessary reagents.

(d)

Textbook Question

Peroxyacetic acid (bp = 105 °C) has a lower boiling point than acetic acid (bp = 118 °C), even though peroxyacetic acid has a higher molecular weight. Explain why peroxyacetic acid is more volatile than acetic acid.

Multiple Choice

Which of the following is NOT a carboxylic acid derivative?

Textbook Question

For each heterocyclic compound,

(i) explain what type of acid derivative is present.

(a)

(b)

(c)

Textbook Question

Which of the following are considered carboxylic acid derivatives?

(a)

Textbook Question