Edexcel IGCSE Chemistry 复习笔记 4.8.2 Disposal of Addition Polymers

• Addition polymers are formed by the joining up of many small molecules with strong C-C bonds
• This makes addition polymers unreactive and chemically inert so don’t easily biodegrade

Disposal of addition polymers is an environmental problem

Landfills

• Waste polymers are disposed off in landfill sites but this takes up valuable land, as addition polymers are non-biodegradable so micro-organisms such as decomposers cannot break them down
• This causes sites to quickly fill up

Incineration

• Polymers release a lot of heat energy when they burn and produces carbon dioxide which is a greenhouse gas that contributes to climate change
• Polymers that contain chlorine such as PVC release toxic hydrogen chloride gas when burned
• If incinerated by incomplete combustion, carbon monoxide will be produced which is a toxic gas that reduces the capacity of the blood to carry oxygen

Recycling

• Polymers can be recycled but different polymers must be separated from each other
• This process is difficult and expensive

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