• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Describe how chemists can use polymers as a feedstock for cracking, and their role in a minimising damage to the environment during the combustion of polymers such as PVC.

Extracts from this document...


Difficulties 1in disposing of polymers, and the movement towards recycling and combustion of polymers. Describe how chemists can use polymers as a feedstock for cracking, and their role in a minimising damage to the environment during the combustion of polymers such as PVC. Plastics are polymers. A simple definition of a polymer is something made of many units. Each link of the chain is the -mer or basic unit that is usually made of carbon, hydrogen, oxygen and or silicon. To make the chain, many links or -mers are polymerized together. Many of the common class of polymers are composed of hydrocarbons. Examples of polymers made up of only hydrogen and carbon are polypropylene, polybutylene, polystyrene and polymethylpentene. Polyvinyl chloride (PVC) contains chlorine. Most polymers are transparent but not all. The polymer chains in objects that are translucent and opaque are in a crystalline arrangement. ...read more.


Plastics deteriorate but never decompose completely, but neither does glass, paper of aluminum. Plastics make up 9.5% of out trash but weight compared to paper, which constitutes 38.9%. Glass and metals make up 13.9% by weight. An option for plastics that are not recycled, especially those that are soiled, such as microwave food wrap, can be a waste-to-energy system (WTE). The controlled combustion of polymers produces heat energy. The heat energy produced by the burning plastics not only can be converted to electrical energy but also helps burn the wet trash that is present. Paper also produces heat when burned but not as much as plastics. Polymers affect every day life. These materials have so many varied characteristics and applications. The number of plastics recycling businesses has tripled since 1990. Recycling of post consumer products is frequently viewed as the only viable solution for managing society's waste/ however, the attributes that make plastics a convenient, resource efficient and versatile material to recycle. ...read more.


If the treatment breaks the polymers into assortments of chemicals species, it is up to the processor to decide whether to recover specific chemicals for feedstock use or use the assortment of chemical species for fuel or use some combination of both end products. The resulting chemicals can then be used to make new plastics that can be in disguisable form the initial or virgin polymers. Feedstock recycling: the thermal depolymerisation of polyolefin's and substituted polyolefin's (large molecules made up primarily of the elements carbon and hydrogen such as polyethylene) into a variety of smaller hydrocarbon intermediates is termed as feedstock recycling. A mixture of hydrogen and carbon monoxide, is an important byproduct of a special class of feedstock recycling processes It can all be used, as chemical feedstock's for further up gradation to commercial products ay oil refineries and chemical plants. Recycling processes appear to be technically robust enough to warrant further development in the future. At this stage the technology is still developing. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Energy, Respiration & the Environment essays

  1. Marked by a teacher

    To make sure we have plenty of energy in the future, it's up to ...

    4 star(s)

    Internet site that tells you how to set one up in your school. You can make sure your classmates recycle all aluminium cans and plastic bottles, and make sure the library is recycling the newspapers and the school is recycling its paper.

  2. Weed study. Dandelions - descrption and characteristics. Investigation to dandelion distribution.

    I will summarize in bullet points the main predictions. Summary - My predictions > Dandelions are very strong and sturdy as their roots can grow up to 1.5 meters in to the ground. Therefore the effects of trampling may not affect the abundance of dandelion.

  1. Polar Bears conservation

    Polar bear numbers are known to be relatively low, and in some places are getting better. At the moment they are a stable species, but this could change in the near future. With the current threats of global warming, the bears are experiencing shorter winters are having a shorter time to eat seals to bulk up for the summer.

  2. the role of pathology service

    In most cases it is because the thyroid cells begin to fail, and thus less thyroid hormone (thyroxine) is produced. This may occur without obvious cause, but may follow: * the body developing an immune reaction against itself (an auto-immune reaction)

  1. formation, extraction and separation of the crude oil.

    that I can put the empty test tube on the water with the delivery tube inside the empty test-tube so that I can get all the gas that was produced in there and the gas produce was hydrogen.

  2. Writing to describe.

    Japanese mixed gleefully with Germans and Spanish with Mexicans as all races rallied around the enthusiastic Disney characters . The characters felt soft and squidgy which felt nice . The rides were so fast that the wind wooshed past my face at lightning speed.

  1. The theory of relativity and its use in Sci-Fi.

    The increase in mass, however, is best understood not as a change in mass but as a change in the relationship of mass and momentum. Momentum (p) is the product of mass x velocity. Here, p' is the relativistic momentum and m is the rest mass.

  2. Investigation into how Lichen growth is affected as you move further away from a ...

    I chose a random spot at each site and started collecting results by setting up a line transect and collecting data. The equipment I used were a 25 meter tape and a 1 meter by 1 meter Quadrat as that is all I needed to gather data as I was

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work