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Recycling_Plastics

2013-11-13 来源: 类别: 更多范文

Recycling Plastics Chemistry Environmental Problem in Canada Project -- Recycling Plastics This paper will mainly focus on the recycling of plastics although the aspects of reducing and reusing/repairing will be briefly touched upon.To begin with an over view of what plastics are, the types of degradable plastics that exist, and current methods of plastic desposal will be presented. Finally, an overall assessment of the plastic recycling effort will be made. What are plastics' Plastics are made of long, chainlike molecules called polymers. There are two different types: Thermoset plastics and thermo plastics. Thermoset plastics are hard and rigid and thermo plastics are soft and more flexable. Thermo plastics can be melted and reshaped many times unlike Thermoset plastics. Nylon, polyethylene, polyurethane and silcones are all types of Thermo plastics. Oil (petrolem) makes plastics, a non-renewable resource. Today, most of our garbage is likely to end up in a landfill or at an incinerator centre where it is burned. This of course includes plastics. The plastic industry is trying to create new materials that will decompose, but experts are worried that the decomposing process could release toxic substances in to the ground and water. Even if they do become safe, plastics will still take plastics, plastic, recycling, recycled, products, made, types, landfills, industry, waste, new, items, thermo, per, environment, degradable, cent, break, year, type, trying, things, thermoset, system, process, people, out, materials, make, helps, garbage, first, exposed, environmental
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