-changes colour depending on termperature
-Can be printed on different surfaces like paper, plastic, ceramics or textiles.
-Can be used as thermometers put on foreheads to meeasure temperature-changes colour according to temperature.
-Changes colour depending on the amount of light.
-Commonly used for light sensitive glasses which turn into sunglasses in the sun.
-Changes colour according to the amount of water available
-Detectors in plant pots-tell you when to water the plants.
-reacts to electrical inputs.
-Car rear-view mirrors darken when bright lights are detected and the glare is reduced.
-Absorbs light during the day then glows at night.
-Fire exit sign, watches
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- Cornstarch polymers
- replace oil-based thermoplastics, is made from potatoes, corn and maize etc, high in starch content-biodegradeable. Used for food packaging.
- replaces polyethene film used in farms, to cover crops with clear polymer made from amize-it can be put into the soil afterwards to improve it.
- starch polymers however don't have the hard-wearing properties of oil-based ones yet.
- made from a combination of starch-based polymers and simple (even recycled) paper fibres
- scratch-resistant, moulded to make inserts for protection and to secure contents.
- fully biodegradeable, can be coloured with vegetable dyes. Weighs less than the equivalent oil-based plastic, which saves on transport and emmissions. For CD and DVD case inserts.
- high strength paper fibre produced from wood pulp, totally biodegradeable within 8 days if in damp conditions. Evironmentally-friendly modern material.
- Used to make the paper for tea-bags, coffee filters and strong envelopes.
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- special plastic used for modelling in technology-stays hard and white at room temperature until 60 degrees celsius, where it is moulded easily like plasticine.
- However, it is very hard at room temp., ideal for making complex models/prototypes, and can be machined with great accuracy. Used for torches and computer games consoles.
- Precious metal clays-99.9% metal (gold or silver), 0,01% clay-it can be shaped at room temperature. It is heated carefully until the metal melts.
- Very expensive, mainly for jewellery designers.
- Nano technology-
- method of changing the atomic structure of materials in order to make them better.
- used to make materials cheaper, lighter, stronger and more precise.
- Manipulating the atomic structure of carbon can form a diamond.
- Changing atoms of silicon can create a computer chip.
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