OCR AS Chemistry - Polymers

Chris Osmundse
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Chris Osmundse
Created by Chris Osmundse over 5 years ago
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OCR AS Chemistry - Polymers
1 Polypropylene
1.1 Resistant to chemical attack
1.2 Uses
1.2.1 Containers that are dishwasher safe
1.2.2 Food packaging
1.2.3 Fibre in carpets
1.2.4 Ropes
2 Polythene
2.1 Most used plastic
2.2 Uses
2.2.1 Shampoo bottles
2.2.2 Plastic Bags
2.2.3 Toys
3 Polyphenylethene
3.1 Cheap
3.2 Uses
3.2.1 Insulation
3.2.2 Model making in food industry
3.2.3 Foam packaging
4 Polymer waste
4.1 Represent 10% of municipial waste
4.2 Non-biodegradable plastics is a major reason why plastics need to be recycled
4.2.1 Recycling Polymers For every tonne of plastic recycled,about 1.8 tonnes of oil is saved Recyling started in early 1980s Recyling involves two stages Sorting The Polymer identification codes are used to seperate the plastics If PVC is not separated effectively from PET it undermines the recycling process. PVC is also known to release poisonous dioxins when heated Reclamation Chopped into small flakes before washing to remove impurities Waste is then made into new material by melting the pellets and remoudling Recycling PVC Problematic High chlorine content Incineration prevents PVC going into landfill sites May cause corrosion to the plant itself Acidic hydrogen chloride fumes are frequently detected First commercial PVC recycling plant PVC separated from other scrap by dissolving in solvents Solvent is recovered and used again
5 As a fuel source
5.1 Produced heat energy if burned
5.1.1 Used for electricity
6 Biodegradable and compostable polymer
6.1 Bioplastics
6.1.1 Compostable
6.1.2 Biodegradable
6.1.3 Derived from raw materials Starch Maize Cellulose Lactic Acid
6.1.4 Manufactured by non hazardous processes
6.1.5 Bioplastics degrade naturally in the enviroment
7 Polymer Identification codes