Done By : School Name :Al-Shamal Independent Secondary school for Girls Module Polymers: Through this module, students examine the different properties of the variety of polymers. Then they design and test a humidity sensor made of a polymer film. Finally, they are asked to design their own products. A home-made filter:Desalinization refer to any of several processes that remove some amount of salt and other minerals from saline water. More generally, desalination may also refer to the removal of salts and minerals , as in soil desalination, which also happens to be a major issue for agricultural production . Salt water is desalinated to produce fresh water suitable for human consumption or irrigation. One potential by product of desalination is salt. Desalination is used on many seagoing ships and submarines.

1. AL-Bairaq
I am discovering materials
8th cycle
Polymers
Group : Altahadi
Fatima Mammdouh – Salma Ahmad - Fatma Ibrahim – Asmaa Abdullah

2. Outline
 Introduction
 Activity 1 : changing polymer pellets .
 Activity 2 : hunting polymer .
 Activity 3 : Comparing the viscosity of liquids .
 Activity 4 : Testing the strength of different polymer
Films .
 Designing Projects : Designing a humidity sensor .
 Project idea : A home-made filter .

3. What is the polymer
 A polymer is a large molecule composed of many repeated
subunits . Because of their broad range of properties .
IInnttrroodduuccttiioonn

4. Activity 1 Changing Polymer Pellets
This activity helped us to understood how the polymer pellets work .
1- Prepare two 0.5 g
of the polymer
pellets .
2- Add 10ml of
the plain water .
3- Allow the mixtures to sit for 10
minutes .
4- Remove the
samples from the
beakers .
5- Pat the samples
to dry with paper
towel .
6- Record the
mass of each
sample .
7- Put the samples
back into their
beakers .

5. Activity 1
Sample A :
Results
Before the experiment After addition the water Increase 10 ml of water
g 0 g 10 g 19
Sample B :
Before the experiment After addition the water Increase 10 ml of salt water
g 0 g 10 g 9
Conclusion :
we’ve learnt that polymers these 2
features : releasing & absorbing water .

6. Hunting for polymer
products
Natural
Wood Cotton
Wool Cellulose
synthetic
Plastic Nylon
Polyamide
In this activity we
surfed the net for
information , And
this was what we
found .
Activity 2
Dyes

7. The viscosity of a fluid is a measure of
its resistance to gradual deformation
. by shear stress or tensile stress
Activity 3
Compar ing the Viscosity of Liquids

8. Activity 3 Comparing the Viscosity of
Liquids
This activity helped us to observed the effect of molecular weight on
viscosity .
Name of Liquid Molecular Weight
( (amu
Methanol 32
Ethylene glycol 62
Glycerol 92

9. Name of Liquid Molecular Weight
We’ve learnt that there is a direct relation between Molecular
Weight and Viscosity .
Results :
More Viscosity
Less viscosity
9
2 62
3
2
( (amu
Methanol 32
Ethylene glycol 62
Glycerol 92
Activity 3
Conclusion :

10. Activity 4 Polymer Films Casting
1- We prepared the
microscoe slides .
2- We registered
data in tables .
3- We wrote the
data on the slides .
4- We sucked some
Poly (vinyl acetate)
by pipette .
5- We put the sample on the slides . 6- We left the slides for 48 hours .
4
This activity helped us to made our own polymer films by casting the polymer solution onto a flat surface

11. 10
0 1 2 3 4 5 6 7 8 9
30 60 90 120 150 180 210
PVAC 1g/40ml
PVAC 10g/40ml
Length ( cm )
Time ( sec )
7- 48 hours later , we
sucked the polymer’s films
using a cutter .
9- we test the change in the
film’s length with pass age of
time and we registered the
acquired .
8- We hanged the films and we
fixed weights at their end .
Activity 4
Results :

12. Designing Projects
Humidity sensor

13. A home-made
filter
Project idea

14. Desalinization refer to any of several
processes that remove some amount
of salt and other minerals from salinewater.
More generally, desalination may also refer
to the removal of salts and minerals , as
in soil desalination, which also happens to
be a major issue for agricultural production .
Salt water is desalinated to produce fresh
water suitable for human
consumption or irrigation. One
potential byproduct of desalination is salt.
Desalination is used on many
seagoing ships and submarines.

15. • We chose this topic as it is important for purifying
salt water in Qatar as it is the only source for
water .
• We liked this topic as it is simple , small and it is
easy to use and this makes it the best solution
way to purify the water of the sea .
• Our project combines chemistry and physics . It
includes chemical actions and the polymer we
used .It is also related to physics in heat circles
inside the set .

16. Acknowledgment
 We would like to thank our school principal and our teachers
for supporting us during our journey in Al-Bairaq .
 Also, we’d like to thank Al-Bairaq team for their big help and
their effective support, Center for Advanced Materials , Qatar
University and all the sponsors, who had gave us the
opportunity to participate in Al-Bairaq project.

17. Thank you for listening