PlasticsGroup E(Sasank,Justin, Chia Wei,Jia Tong)

Questions1.Plastics are classified according to the Plactic Identification Code. What are the types of plastic represented by different codes?

Plastic #1: Polyethylene Terephthalate (PET or PETE)

Plastic #2: High Density Polyethylene (HDPE)

Plastic #3: Polyvinyl Chloride (PVC)

Plastic #4: Low Density Polyethylene (LDPE)

Plastic #5: Polypropylene (PP)

Plastic #6: Polystyrene (PS)

Plastic #7: Other (O)

2.What characteristics of plastic make them popular?

-Resistant to corrosion and chemicals-Low electrical and thermal conductivity-Durable-Resistant to water and have low toxicity.-Resistant to shock

3.What environmental problems are caused by the prevalent use of plastics?

-Hazardous to wildlife(Choking hazard)-Marine Pollution-Depletion of ozone layer

4. How does technology help solve these environmental problems?

-Technology for recycling plastic is available. However, the market for recycling certain plastics is very small and is shrinking.

01-PET

Polyethylene terephthalate also known as PET or PETE.Application:The vast majority of Disposable soda and Water bottles.Properties: -Unreinforced -Semi-crystalline thermo-plastic polyester-Excellent wear resistance-Low coefficient of friction-Superior dimensional stabilty

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02-PE-HD

High-density polyethylene or PE-HD.

Application:Milk jugs, Detergent bottles, Juice bottles, Butter tubs, and Toiletries bottles.

Properties: -Strong-Resistant to chemicals and moisture-Permeable to gas-Ease of processing and forming-Stiff-Tough

03-PVC

● It is a polymer made by catalytic polymerization of vinyl cloride.

● Properties:strong, difficult to burn, strong acid and bases resistance comparing to other chemical and organic slovents.

● Common Application:Plastic pipes, outdoor feature, shrink wrap, water bottle, salad dressing,

04-PE-LD A.K.A Polyethylene low-density

● It is made from monomer ethylene.● Properties: relatively low tensile

strength at yield and surface hardness, high viscosity, soft to rigid, sensitive to tension cracks, water repellent

Application: Dry cleaning bags, produce bags, trash can liners, food storage containers.

05-PP

Polypropylene or polypropene.

Properties: -Bad conductor

-Translucent

-Hard

-Stiff

-Resistant to many chemicals

Application: Trays, pails, bottles and funnel.

06-PS

Polystyrene or more commonly known as Styrofoam.Properties: -Electrical insulator -Small-Lightweight-Shock absorbing-Bad conductor of heat -Hard-Stiff

Applications: trays, containers, disposable eating utensils, foamed cups, plates, and bowls.

07-O● (Other) is the category which covers all the

other plastic materials other than the 6 listed. Or the other things that are made with plastic resin, or has multiple types of plastic resins in it(MIX) For example: BPA, polycarbonate

● The properties depends on the resin or the combination of resins used in the plastic

● It can be applied in bottles