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19 Cards in this Set
- Front
- Back
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What does stiff mean?
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Difficult to bend
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What does hard mean?
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Difficult to cut
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What does soft mean?
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Easy to cut
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What is tension?
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A pulling force
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What is compression?
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A squeezing force
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What is a polymer?
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A long chain of repeating units
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What does synthetic mean?
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Man-made
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What are the small molecules that make a polymer called?
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Monomers
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How is crude oil separated?
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Fractional distillation
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What is a hydrocarbon?
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A compound made from carbon and hydrogen only
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What is a plasticizer?
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A chemical added to a plastic to make it softer
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What does cross linking do?
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Cross linking joins polymer chains together and makes them stronger, stiffer and more hard wearing
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What happens as the polymer chain length increases?
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Longer chained polymers are stronger and harder with a higher melting point
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What is a LCA?
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Life cycle assessment
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Why is a LCA carried out?
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To find out the environmental impact of a product
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Name one factor considered in an LCA?
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Energy for production, use or disposal
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What is sustainability?
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Leaving resources for future generations
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What is LDPE?
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Low density poly(ethene)
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What is HDPE?
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High density poly(ethene)
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