Plastics Recycling - SENS

Plastics Recycling - SENS

Plastics Recycling Ryan Rose . Alphonse G. Mutsindashyaka Objective To determine if why it is important to recycle plastics made from synthetic

polymers - statistics - advantages - disadvantages - impact on environment Why Recycle Question arises about what to do with

plastic waste Waste accumulation has been a problem throughout history Growth in technology requires new materials Most consumer waste end up in landfill DEFINITION Plastics -> are commercial materials made from

synthetic polymers 2 types of polymers -Thermoplastic polymers *Structured linearly, Heat softened -Thermoset polymers *Formed with irreversible cross-linkages of covalent bonds, not heat softened

Thermoplastic & Thermoset Wastes per Sector Different types of plastic resins Copolyesters To make toys, medical devices, appliances parts, oral care products, and housewares. Polyethylene Terephthalate (PETE)

To make soft drink bottles, waste containers, vegetable oil containers. High-Density Polyethylene (HDPE) To make pharmaceutical bottles, milk jugs, butter tubs Low-Density Polyethylene (LDPE ) To make caps, trash bags, shrink-wraps, netting TYPES CONTD

Vinyl/Polyvinyl Chloride (V/PVC) To make beauty bottles, vegetable oil bottles, food wraps Polypropylene To make butter tubs , bottle tops, carpets and food wraps

Plastics Recycling Process Sort and clean different plastic groups Melt plastic into bales Break bales up and grind into small flakes Wash, rinse and dry flakes in hot air Color maybe added or maybe run through a pelletizer

Advantages of Recycling Waste reduction Conservation of energy Save money Create new jobs Generate revenues Disadvantages

Recyclable materials might be in contact with radioactive materials The chemical bonds (toughness) Impossible to recycle at 100% Growth in plastic bottles recycling Plastic bottle recycling increased since 1990

Growth of plastic bottles contd Manufacturers and consumers do value plastics for their low cost,versatility and performance benefits. Consumer demand safety and convenience *Prefer to buy products in plastic

-> light weight and shatter resistant Conclusions Recycling - save money - use less raw materials - no landfills- plastics take about 20 to 30 years to decompose

QUESTIONS ? REFERENCES: 1. Fried, Joel R. Polymer Science and Technology. Prentice Hall: Upper Saddle River, NJ 1995 2. www.sperecycling.com

3. www.dupont.com (Plastics recycling) 4. www.eastman.com (Eastman chemicals) 5. www.raffrecycling.com RECYCLING.jpg

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