Monomers combine to form polymers or macromolecules. Natural polymers include proteins, cellulose, starch, cotton, silk, and wool. Synthetic polymers include nylon, rayon, polythene, and PVC. Polymers are used to make fibers, plastics, and rubber. Fibers are long threads used to make textiles. Plastics can be molded and are typically organic polymers. Rubber is a natural elastic polymer isolated from latex. Synthetic fibers like nylon and rayon were developed as cheaper alternatives to natural fibers.

4.  Monomer molecules combine to form polymers.
 Polymers /Macromolecules formed by the
combination of large group of simple molecules
/monomers.

6. Glucose
Amino
acids
MONOMERS
Starch
Protein
POLYMERS

7. NATURAL POLYMERS
• Proteins , cellulose , starch,
cotton, silk, wool ,jute
SYNTHETIC POLYMERS
• Nylon , Rayon, Polythene, PVC

8. FIBRES
PLASTICS
RUBBER

9.  Polymers suitable for the manufacture of
strong threads.
 A natural or synthetic substance that is
significantly longer than it is wide.
 Synthetic fibers can often be produced very
cheaply and in large amounts compared to
natural fibers

10.  Polymer which can be moulded into different
shapes.
 Material consisting of any of a wide range
of synthetic or semi-synthetic organic
compounds that are malleable and so can
be molded into solid objects.
 Plastics are typically organic polymers of
high molecular mass and often contain other
substances.

11.  Natural polymer with elastic
properties.
 It is isolated from the latex, obtained
from rubber tree.
 Polymer formed by the combination
of the monomer , isoprene
 Synthetic Rubbers: Neoprene,
Thiokol, Buna-S, Buna-N

12.  Also known as Man-made fibres.
 Synthetic fibres are the result of extensive research
by scientists to improve on naturally occurring animal
and plant fibres.
 Joseph swan invented the first synthetic fiber in the
early 1880s.

13. MERITS DEMERITS
Comfortable to wear Less available
High aeration Fades colour
They can absorb water High cost
Low inflammability Low durability

14.  Cheaper than Natural fibres.
 High durability.
 Wrinkle free.
 Can dry easily on getting wet.
 Easily available than natural fibres.
 Aeration is Lower than natural fibres.

15. Find out the correct property that applies
to synthetic threads in comparison to
natural threads.
 Aeration (High/Low)
 Ability to absorb water (High/Low)
 For hot weather (Suitable/Not suitable)
 Inflammability (High/Low)

16. • First artificially prepare
fibre
• Got its name from the
names of the cities
New York & London
NYLON
• Semi-synthetic fibre
known as Artificial
silk.
• Used for the
manufacture of ‘silk
clothes’.
RAYON