Flashcards
27.3 Condensation polymers
Flashcards do conjunto (10)
- 1Name two important condensation polymers.Polyesters and polyamides
Carboxylic acids and their derivatives are common starting materials for their preparation - 2How are condensation polymers made?Condensation polymerisation is the joining of monomers with loss of a small molecule, usually water (the condensation) or hydrogen chloride
- 3In condensation polymerisation how many functional groups are needed?Two
- 4How are polyesters made?When making a polyester, monomers are joined together by ester linkages in a long chain to form the polymer.
Polyesters can be made from one monomer containing both a carboxylic acid and an alcohol group, or from two monomers - one containing two carboxylic acid groups and the other containing two alcohol groups - 5Polyesters made from one monomer containing two different functional groupsIn this type of polyester formation, only one monomer is involved, containing both different functional groups, a hydroxyl group -OH, and a carboxyl group -COOH
Forms ester linkage and water - 6Polyesters made from two monomers each containing two functional groups - What monomers are involved here and what is formed?For this type of a polyester formation, two different monomers are involved, each with different functional groups
One monomer is a diol, with two hydroxyl groups
One monomer is a dicarboxylic acid, with two carboxyl groups
Ester linkage and water is formed - 7How are polyamides formed?Polyamides are condensation polymers formed when monomer are joined together by amide linkages in a long chain to form the polymer
Polyamides can be made from one monomer containing both a carboxylic acid (or acyl chloride) and an amine group - or from two monomers, one containing two carboxylic acid groups (or acyl chlorides) and the other containing two amine groups - 8Polyamides from one monomer with two functional groups - What is formed?Amino acids contain both an amine group and a carboxylic acid group
Amino acids undergo condensation polymerisation to form polypeptides or proteins
A polypeptide or protein contains many different amino acids all linked together by amide bonds
When an amide bond is formed water is lost - 9Polyamides from two monomers each with two functional groupsPolyamides can be made by the reaction of a dicarboxylic acid (or acyl chloride) with a diamine
During the condensation reaction an amide forms between the amine on one monomer and the carboxyl (or acyl chloride) group on the other monomer - 10How do you hydrolyse condensation polymers?Using hot aqueous alkali such as sodium hydroxide or by hot aqueous acid such as hydrochloric acid
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- A level Chemistry (Module 6: Organic chemistry and analysis) FlashCards sobre 27.3 Condensation polymers, criado por Urvi B em 24-02-2019.
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