Last lesson - brief discussion on plastic everywhere in our life

Classification of plastics
- thermoplastics
-thermosetting plastics
Plastics also called polymers
Crude oil is what plastics are made of
Recycling plastic
Bio-degradable plastics (I.e plastic bag)

Discussion of shopping bag usage (minimum figure)
15 families
12 bags a week
4 bags a week for little shop

20 bags/ week/ student family
20 X 52 = 1040 per yr
1040 X 525 = 546,00 bags

This figure is pretty bad, I'm glad it's no my family though. My parents use enviro bags and recycle as much as possible. I think there needs to be more awareness. The environment minister should also advertise these kind of things as well, they are all like " go green and take
shorter showers and change lightbulbs" but less shopping bags is a better side to take. When I was in Adelaide for National Swimming every shop there has banned plastic bags, you have to bring your own or they charge you 20c-40c per bag. If that was my family and we didn't take our own bags that would be quite expensive over the year, especially with the amount of food I eat.


20bags a week X 20 cents
= $4

$4 X 52 weeks per yr
= $208

That is a lot of money wasted on plastic bags. This lesson was really eye opening. Wardy also mentioned that we are skipping robots for a while and moving on the desk tidys. All I know is I'm desperate for one. I've already started getting ideas for it. Can't wait to start production.

Desk Tidy Inspiration Photos

Plastic Video Report

• Old cars made of metal, canvas, wood and rubber. No plastic
• New car today's made out of plastics. Polycarbonate, acrylic, PVC, fibre glass etc.
• Are synthetic
• Chemical factories made from crude oil or natural gas.
• Heat oils to separate different oils, some go to make petrol
• Ethylene
• Polyethylene
• Different kinds can be produced from one oil
• Cut into pellets (polymer)
• Types of plastics: thermoplastics and thermosets
• Thermoplastics melt when heated
• Thermoset plastics don't melt when heated. It breaks down when heated.
• Thermoplastics
• PET, polyethylene , PVC, polypropylene,
• Plastics can be mixed to make alloys ( ABS )
• Physical properties of plastics
• Tensile strength - nylon very good, specially for guitars
• Impact strength - isod impact test. Zenoid good for impact resistance, polypropylene
• Stiffness - resistance to bending. Zenoid was best in the test. PVC pipes
• Hardness - resistance to scratching and indentations.
• Friction - physical property in some products, eg. Nylon low friction for gears.
• Thermal properties - how the material behaves at different temperatures. Acrylic is good for bending stuff.
• Thermoplastic have a lower melting point.
• Melt flow, how easy of flows when melted.
• Electrical properties - poor conductors, excellent insulators
• Chemical properties - plastics resist corrosion. PVC can be dissolved by acid. Petrol containers are very high density polyethylene. Sunlight can effect it. Paintability. Flame treatment now used so paint can be put on polyethylene.

ROBOTS!!!!!!!!!

In the lesson last week we talked about robots!!! We played with Wardy Jr. ( super cool robot Wardy bought)
We revised the processes of functions

Input - process - output

Ww discussed how we can make our robots do all kinds of things including sensors. Such as
Smell, sight, light, touch and sound sensors

We can make our robots dance, fight ( and dress them up) or even act like a cockroach.
( I like the sound of the cockroach)

Can't wait to start building my super awesome robot!

The Final Product

Below is the finished product for this assessment. I am really happy with it even if it is quite simple or easy as quite a few people have said to me. I'm proud of what I have achieved because I know that I put 100% into it. I have had lots of people say nice things about my toy when I take it to and from school occasionally. I am really looking forward to our next unit of work, I think it is robotics which is really cool because I have the same robot kit at home (with a few pieces missing...). Design has been so much fun and I have learnt so much from Mr Ward, my friends and my self. It has been very rewarding. Anyway, below is my final product, I think I'll call it Drinking Birds I (Hee Hee Hee), and I am Very, Very happy with how it came together.

My Awesome Toy