Download 8.1 Condensation Polymers

8.1 Condensation Polymers
8.1.1 Starch
LO: I know the structure of
starch.
Starch is a condensation polymer formed by joining
glucose molecules together.
Each monomer in a condensation polymer must have
at least two functional groups.
LO: I know the structure of starch.
8.1.2 Polyesters
LO: I know the structure of a polyester.
An ester is formed when an alcohol reacts with a
carboxylic acid.
The monomers used to make a polyester are:
• An alcohol with two hydroxyl groups (diol).
• An acid with two carboxyl groups (diacid).
LO: I know the structure of a polyester.
8.1.3 Polyamide
LO: I know the structure of a polyamide.
An amide is formed when an amine reacts with a
carboxylic acid.
H
An amine is a molecule containing
N
an amino group ( NH2 ):
H
For example, ethylamine:
H
H
H
C
C
H
H
H
CH3CH2NH2
N
H
The molecules react
to form an amide link:
LO: I know the structure of a polyamide.
O
H
C
N
The monomers used to make a polyamide are:
• An amine with two amino groups (diamine).
• An acid with two carboxyl groups (diacid).
Nylon is a polyamide.
LO: I know the structure of a polyamide.