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plastics - Coggle Diagram
plastics
plastics
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plastics are very usefull now in days.they are used to make containers and packaging,but we also use them for things like : transport,constuctionand medicine.(plastics are formed by polymers made of carbon)
propertys
the propertyes vary fron one plastic to another,but most have: strength,elastisity,ridgidity and flexibility
examples
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MECHALICAL
malleability,ductility and mechanical restistins
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OTHER
low density, impermeability
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clasification
thermoplastics
manufactured from petroleum.They are formed by weak molecular chains,when we heat themthey become soft.
thermostable plastics
derrived from petroleum.they form strong chains in different deirections,they canot be reshaped
elastomers
made by mixing sulfer and rubber at 160º(vulcanisation).They are hard and elastic,they are formed by chains folded over.
formation techniques
plastic comes in 3 forms:powder,grain and resin.we use diferent procesis depending on the use
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