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Problems with Polymers (Disposing (Recycling (Many polymers can be…
Problems with Polymers
Making
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Polymers are very large molecules made when many smaller molecules join together, end-to-end. The smaller molecules are called monomers.
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Disposing
Recycling
Many polymers can be recycled. This reduces disposal problems and the amount of crude oil used. But first the different polymers must be separated from each other. This can be difficult and expensive.
Biodegradable polymers
Most polymers, including poly(ethene) and poly(propene), are not biodegradable. This means microorganisms cannot break them down, so they may last for many years in rubbish dumps. However, it is possible to include chemicals that cause the polymer to break down more quickly. Carrier bags and refuse bags made from degradable polymers are already available.
Incineration
Polymers release a lot of heat energy when they burn. This energy can be used to heat homes or generate electricity. But there are problems with incineration. Carbon dioxide is produced, which adds to global warming. Toxic gases are also produced, unless the polymers are incinerated at high temperatures.
Landfill
Waste polymers are disposed of in landfill sites. This uses up valuable land, and suitable sites often fill up quickly.
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