Done By :Al-Amal Group 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. Non adhesion with Epoxy : The concrete material stuck in the pot ,So we found a polymer prevents the adhesion of concrete in the pot

1. I am discovering materials
8th cycle ( AL-Bairaq (
polymers
Group : Al-AMAL
1- Mneera Nasser
2- Noura Rashed
3- Noor Saib
4- Latifa Ali
5- Lulwaa Eisa

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 .
• Design Project (humidity sensor) .
• Product Idea ( Non adhesion with Epoxy ) .

3. •Introduction
What’s the polymer ?
A polymer is a large molecule, or
macromolecule, composed of many repeated
subunits.

4. Activity 1: Changing polymer pellets .
1- Add two 0.5 g of the polymer, in a plain water.
After 10 min
2- Measure each sample .
3- Back simple in the beakers .
When adding water•
4- Change in their weight
After 10 min
When adding salt water•
A
B

5. Activity 1: Changing polymer pellets .
Samples weights table
Sample A :
Sample B :
Increase 10 ml of
water
After addition
the water
Before the
experiment
0.5 g 10 g 19 g
Increase 10 ml of
salt water
After addition the
water
Before the
experiment
0 .5g 10 g 9 g

6. Activity 2: Hunting polymer .
Polymer consists of two parts :
natural polymer Synthetic polymer
wool silk Cotton
Arabic gum Hair
Nylon Rubber
Plastic
Leather dyes
Industrial

7. Activity 3: comparing the Viscosity of liquids
.
Viscosity
Viscosity : is the resistance of a
liquid to flow .

8. Activity 3: comparing the Viscosity of liquids
.
We made an experience with three
different liquids molecular weight :
Name of Liquid : MolecularWeight (amu)
Methanol 32
Ethylene glycol 62
Glycerol 92
Result :
More Viscosity
Less viscosity
92
62
* There is a direct correlation between 32
molecular weight and viscosity .

9. Activity 4: Testing the strength of different .
polymer films
Part
1
1- Write the table .
2- Use pipettes to take polymer solution .
3- Make a layer of the solution on the slide .
Keep it for
48 hour .

10. Part
2
1- Use a razor blade to peel off films
After 48 hour
2- Initial lenght of the film .
4- Measure and record
the length every 1 min.
To test the stretching
of three polymer films .
3- Put the film between the binder clip .

11. Activity 4: Testing the strength of different .
polymer films
changing length every 1 min
PVAC 100 : PVAC 170 :
Time (sec) Length (cm)
0 0
30 1
60 2
90 3
120 4
150 5
180 6
210 7
Time (sec) Length (cm)
0 0
30 2
60 2.5
90 3
120 4
150 4.3
180 4.5
210 5

12. Activity 4: Testing the strength of different .
polymer films
* Whenever the solution
concentration less, spilled
more .
10
9
8
7
6
5
4
3
2
1
0
30 60 90 120 150 180 210
PVAC 1g/40ml
PVAC 10g/40ml

13. Design Project (humidity sensor) .

14. Project Title :
( Non adhesion with Epoxy ) .

15. • Product Idea ( Non adhesion with Epoxy ) .
The concrete material stuck in the pot .
So we looked for a polymer prevents the
adhesion of concrete in the pot

16. • Product Idea ( Non adhesion with Epoxy ) .
The idea of the project is
based on the use of epoxy
polymer that prevents the
adhesion of concrete
materials.

17. • Product Idea ( Non adhesion with Epoxy ) .
Characteristics of epoxy :
1- Susceptibility high adhesion .
2- Lack of contraction when drying .
3- Resides in the liquid state .

18. Product Idea : ( Non adhesion with Epoxy ) .
The First day :
1- used sand, cement and epoxy polymer
.
2- Anoints the mold with
epoxy
3- mixed cement with sand and some water
.
After
drying
4- Put the mixture in the mold which
anointed by epoxy
After
24 h

19. • Product Idea ( Non adhesion with Epoxy ) .

20. • Product Idea ( Non adhesion with Epoxy ) .
Recommendations :
1- We recommend anointing the mold
which the concrete materials kneaded on
it , to prevent adhesion .
2- Project should be wider applied and
use special ovens for drying polymer
quickly after anointing .

21. Thank you for your kind
attention .
and we want to thank