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5 Cards in this Set
- Front
- Back
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desribe the process of polymerisation |
monomers are passed at high tenperature over a catalyst. the double bond opens and forms a polymer chain made of the monomers. |
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what uses do we have for polymers |
polyethene plastic bottles polypropene crates and ropes polychloroethne water pipes and insulation |
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why is it important to recycle polymers |
they are made from crude oil which non renewable |
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what are biodegradable plastics |
plastic that dont break down easily. corn-starch are built into the plastic down. |
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name and describe 3 smart polymers |
light sensitive plasters top layer of plaster peeled back. lower layer now exposed to light adhesive loses stickness. peels easily off the skin hydrogels have cross-linking chains that trap water. act as wound dressings. let body heal. good for burns. shape memory wound is stitched loosely. temp of the body makess the thread tighten. closes the wound up. |
