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Aspects of Polymers

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Aspects of Polymers

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.

The degree of translucenence or opaqueness of the polymer is directly

affected by its crystalline,

Scientist and engineers are always producing better materials by

manipulating the molecular structure that affects the final polymer

produced. Manufacturers and processors introduce various fillers,

reinforcements, and additives into the base polymers, expanding

product possibilities.

Polymers are divided into two distinct groups: thermoplastics and

thermo sets. The majority of polymers are thermoplastic, meaning that

once the polymer is formed it can be heated and reformed over and over

again. This property allows for easy processing and facilitates

recycling. The other group thermo sets, cannot be remolded. Every

polymer has very distinct characteristics, but most follow the

following general attributes. :

Polymers can be very resistant to chemicals.

Polymers can be bother thermal and electrical insulators.

Generally, polymers are very light in weight with v...

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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.
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