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Polyamides are polymers that contain many amide groups. These groups form when a carboxylic acid reacts with an amine.

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Presentation on theme: "Polyamides are polymers that contain many amide groups. These groups form when a carboxylic acid reacts with an amine."— Presentation transcript:

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2 Polyamides are polymers that contain many amide groups. These groups form when a carboxylic acid reacts with an amine.

3 Polyamides are polymers that contain many amide groups. These groups form when a carboxylic acid reacts with an amine.

4 Polyamides are polymers that contain many amide groups. These groups form when a carboxylic acid reacts with an amine.

5 Water is eliminated in the reaction, which is called a condensation reaction.

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7 The carboxylic acid and amine are linked by an amide group, –CONH–.

8 Polyamides are formed by the reaction between a dicarboxylic acid and a diamine.

9 Water is again eliminated in the reaction.

10 The dicarboxylic acid and diamine are linked by an amide group.

11 Notice that there is a carboxyl group on one end of the molecule and an amino group on the other end.

12 Notice that there is a carboxyl group on one end of the molecule and an amino group on the other end.

13 Notice that there is a carboxyl group on one end of the molecule and an amino group on the other end.

14 Notice that there is a carboxyl group on one end of the molecule and an amino group on the other end.

15 These can react with more diamine and dicarboxylic acid molecules.

16 When this happens, a polyamide forms.

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21 Nylon is a polyamide. Many monomer units are present in a single polymer chain.

22 1,6-diaminohexane is a diamine that can form a polyamide with a dicarboxylic acid.

23 Hexane-1,6-dioic acid is a dicarboxylic acid that can form a polyamide with a diamine.

24 What is the repeating unit of the polyamide formed if n monomer molecules react together?

25 What is the repeating unit of the polyamide formed if n monomer molecules react together?

26 What is the repeating unit of the polyamide formed if n monomer molecules react together?

27 Water is formed in the reaction.

28 A polyamide with this repeating unit is also formed in the reaction.

29 The polyamide formed is called nylon-6,6.

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34 This is because there are six carbon atoms in the original diamine …

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36 … and six carbon atoms in the original dicarboxylic acid.

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38 This is the repeating unit of nylon-5,10.

39 It would be formed from 1,5-diaminopentane, which has five carbon atoms …

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41 … and decane-1,10-dioic acid, which has 10 carbon atoms.

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43 Different nylons have different properties.

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