This document outlines several activities exploring polymers: 1) Activity 1 examines how polymer pellets change size and mass when added to water or salt water solutions. The pellets absorb water and swell while releasing water and shrinking in salt water. 2) Other activities compare the viscosity of liquids, test the strength of polymer films, and design a humidity sensor using a polymer that changes color based on moisture content. 3) The document introduces polymers as large molecules composed of repeating subunits and examples of natural (cotton, DNA) and synthetic (rubber, PVC) polymers. It provides directions and results for the activities.

1. Al-Bairaq
Abdullah Jarouf Abdullah Abdulshaheid
Ahmed al_khuzaei

2. Outline
• Introduction : polymers sources
• Activity 1: Changing polymer pellets.
• Activity 2: Hunting for polymer products.
• Activity 3: Comparing the viscosity of liquids.
• Activity 4: Testing the strength of different
polymer films.
• Design Project: Designing a humidity sensor.
• Product Idea: Making Banana toothpaste .

3. A is a large
molecule composed of
many repeated subunits,
known as monomers.

4. Activity 1: Changing polymer pellets
• Objectives :
• How do the polymer pellets
work ?
• What happened to the
pellets when they are added
to the soil ?

5. Activity 1: Changing polymer pellets
Beaker A Beaker B 0.5 g polymer pellets
10ml water 10ml NaCl Timer
We will need :

6. Activity 1: Changing polymer pellets
After adding waterBefore adding water
10.4 gBeaker A : 0.5 g
10.2 gBeaker B : 0.5 g
Beaker B
After adding (Nacl):
Beaker A
After adding water :
7.2 g16.3g

7. Activity 1: Changing polymer pellets
• When we add water on the polymer, it will
absorb the water and swell.
• And when we add (NaCl) to the polymer, it will
release the water and shrink.

8. • Natural polymers :
cotton DNA Honey
The gum

9. • synthetic polymers :
Rubber Thread PVC
glass Rubber

10. • In this activity we are going to compare the
viscosity of the vary liquids .

11. Liquid M.W. (amu)
methanol 32
Ethylene glycol 62
glycerol 92

12. Making polymer films

13. 0
2
4
6
8
10
12
14
16
1 3 5 7 10
Lengthcm
Time min
Stretchability
pvac 170.000
pvac 260.000
Result :

15. • To make a humidity sensor we added water to
the polymer ( poly vinyl alcohol) and indicator
( CoCl2).
• The indicator color is pink in the wet weather
• The indicator color will change to blue in the
dry whether .