TKM CHAPTER 20 POLYMERS

CHEMISTRY SK025
CHAPTER 20: POLYMERS

TUTORIAL The smallest and simplest repeating unit of a polymer.
1. (a) The polymers that is made up of two or more different monomers.
The polymer contains branches that connects linear polymer chain.
(b)
(c)

2. Natural polymers are polymers that are found naturally such as rubber, protein,
carbohydrates.
Synthetic polymers are polymers that are prepared chemically from monomers. Example:
nylon, plastic, synthetic rubber, Kevlar, Dacron.

3. (a) HHHH (b) O O
CCCC
H CN CH3 Cl n C C6H4 C O CH2 (CH2)3CH2O
n

4. (a) H2C=CHCH=CH2 (b) HOOC(CH2)6NH2 (c) H2C=CF2

(d) HOOC COOH and H2N NH2

(e) H2C=CHCOOCH3

O O
CH2 C OH
(f) HOCH2CH2CH2OH and HO C CH2

(g) CH CH2

5. (a) The chemical process in which two monomers react to form a larger molecule and
eliminate a smaller molecule such as H2O, CH3OH and HCl.

(b) P. H3C CH3 Q. HOOC COOH O O
R. H3C O C C O CH3

6. (a) i. HOOC(CH2)4COOH

ii. H2N(CH2)6NH2

(b) n HOOC(CH2)4COOH + n H2N(CH2)6NH2 OC(CH2)4CO-HN(CH2)6NH n

(c) amide

(d) OC(CH2)4CO-HN(CH2)6NH

(e) polyamide.
(f) condensation polymerisation.

SK 1

CHEMISTRY SK025
CHAPTER 20: POLYMERS

MEKA

1. (a) i. Basic molecular units that can joined to many others to form a polymer.

ii. Polymer that are built from the same type of monomer units.

iii. Polymers that are built by different monomers.

(b) i. Cl ii. CHCH2 iii. Cl
CH2CH n CH3 n CH2 C CH2CH
Cl Cl n

iv. O
O
C C O CH2 CH2 O
n

2. (a) CH3 (b) H2N-(CH2)6-NH2 and HOOC-(CH2)4-COOH

H2C CH

(c) Cl
H2C C CH CH2

3. (a) Condensation polymerization is a process that combines the monomers with
elimination of a small molecule such as water, methanol, hydrogen chloride or
ammonia to form a polymer.
Addition polymerization is the addition reaction in which unsaturated monomers are
joined together by covalent bonds to form a polymer without elimination of a small
molecule.

(b) i. addition polymerization
ii. condensation polymerization
iii. addition polymerization
iv. condensation polymerization

SK 2

CHEMISTRY SK025
CHAPTER 20: POLYMERS

KUMBE OO
NH-(CH2)6 NH C (CH2)4 C n
1. (a) H2N-(CH2)6-NH2 + HOOC(CH2)4COOH
(b) Condensation polymerization.

2. (a) HO-CH2CH2-OH and HOOC-CH2-COOH
(b) Condensation polymerization

(c) homopolymer
copolymer

Polymers that are built by Polymer that are built from the
same type of monomer units
different monomers.

Eg: saran Eg: polyethene

3. (a) Condensation polymerisation is a process that combines the monomers with
elimination of a small molecule such as water, methanol, hydrogen chloride or
ammonia to form a polymer.

(b) Kevlar O OO O
H2N NH2 and Cl C C Cl or HO C C OH

(c) amide linkage

4. (a) Cl (b) Cl
CH2 CH n CH2 CH

(c) Addition polymerisation.
(d) Peroxide.
(e) Piping, floor tiles, clothing, toys, wire covering.

SK 3