- To recall the common polymers and their applications - To investigate the benefits of biodegradable polymers and how they work Complete the table with.

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Presentation transcript:

- To recall the common polymers and their applications - To investigate the benefits of biodegradable polymers and how they work Complete the table with the following 1.Full name of the polymer 2.Suggest an application 3.Highlight the ones which are recyclable.

- To recall the common polymers and their applications - To investigate the benefits of biodegradable polymers and how they work Are polymers sustainable?

- To recall the common polymers and their applications - To investigate the benefits of biodegradable polymers and how they work Biodegradable polymers -Conventional polymers are a by-product of petro- chemicals -These are detrimental on the environment including not being degradable -Biodegradable polymers have designed to degrade under certain conditions

- To recall the common polymers and their applications - To investigate the benefits of biodegradable polymers and how they work Polylactides (PLA) - Starched-based polymers -These are derived from renewable sources such as potatoes, corn, wheat and pine trees -They are transparent and has similar properties to polyethylene -They are used for plastic bottles, plastic bags, gardening products, babies nappies and medical implants -They are degradable through micro-organisms -They are much weaker then conventional polymers

- To recall the common polymers and their applications - To investigate the benefits of biodegradable polymers and how they work PHAs and PHBs -PHAs - Polyhydroxyalkanoate (Biopol) -PHBs - Poly-beta-hydroxybutyrate -These are produced by using bacteria to aid in the fermenting plant sugars. -These have similar properties to polypropylene -They are used for plastic food packaging and also are used widely in medicine for slow-release medication, implants and bone plates -They are degradable through micro-organisms

Oxo-degradable polymers -These are additives that can be used in conventional polymers to greatly reduce there degradation -The additives helps break the polymer down into a fine white powder after exposure to heat, oxygen or moisture -This powder is easier for micro-organisms to breakdown -Photo-degradable polymers can also be added and help a polymer to be broken down by exposure to UV light -This additve can be added to numerous polymers such as PE, PVC, PP, PET and PS - To recall the common polymers and their applications - To investigate the benefits of biodegradable polymers and how they work

Water-soluble polymers -These are polymers which quickly biodegrade in water -They are very weak but have start to be widely used in the laundry industry -They are use for detergent capsules for consumer use and one-use laundry bags in hospitals