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

Plastic materials - There are many different types of plastic, depending on the kind of monomer, the length of polymer chains, and other added compounds.

Extracts from this document...

Introduction

Plastic materials There are many different types of plastic, depending on the kind of monomer, the length of polymer chains, and other added compounds. Plastics are usually known by their initials. The numbers follow an international standard for recycling. 1 - PET - polyethylene Terephthalate 2 - HDPE - High-Density polyethylene 3 - PVC - PolyVinyl Chloride 4 - LDPE - Low-Density PolyEthylene 5 - PP - PolyPropylene 6 - PS - PolyStyrene 7 - Other resins, like acrylonitrile butadine styrene (ABS) 1. PET (Polyethylene terephthalate) PET is made by condensing ethylene glycol and terephthalic acid. Known as thermoplastic polyester, this substance is able to exist in either an amorphous or highly crystalline state. ...read more.

Middle

Therefore it is used in applications where rigidity is important. HDPE is easy to process, cheap, and highly resistant to chemicals. A negative point is that toxic fumes are produced when HDPE is burnt. 3. PVC (Polyvinyl chloride) PVC is made up of vinyl chloride. The plastic can be rigid or flexible, and is durable, weatherproof, and strong. Maximum temperature for PVC is 60oC; under 0oC it becomes brittle. PVC has outstanding resistance to alcohol's, water, concentrated acids, alkalis, petrol and oil. It is not resistant to aromatic solvents. PVC is, in principal, an indestructible plastic unless it is burnt, but then toxic hydrochloric acid is released. ...read more.

Conclusion

Therefore polystyrene is a good insulator and can hold food or drinks at a desired temperature. Polystyrene is also able to absorb shocks, protects against moisture, and is resistant to staining. However, it is brittle and crumbles easily. PET HDPE PVC LDPE PP PS Burns with matches Yes Yes No Yes Yes Yes Drips (rapidly) Can be ignited but will self-ex-tinguish if fire source is taken away (rapidly) (slower) Black particles White smoke White smoke White smoke Drips Drips Does not drip Smells like candle wax Smells like candle wax Smells like burning fuel Rigity Rigid Semi-rigid Semi-rigid Flexible Semi-rigid Brittle to Semi-rigid Tough Bottle surface Glossy Rough Very glossy Low gloss Usually low gloss Glossy ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Resistant Materials 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 GCSE Resistant Materials essays

  1. EFFECT OF MOISTURE ON THE MECHANICAL PROPERTIES OF NYLON

    by a similar technique. Nylon 612 uses decane-1, 10-dicarboxilic acid. Azelaic acid is used for 69. NYLON 6 Both batch and continuous processes have been used for the manufacture of nylon 6. In a typical bath process caprolactam, water (which acts as a catalyst) and a molecular weight regulator, e.g.

  2. THE BENEFITS OF RECYCLING

    Glass Clear, amber and green glass from beverage bottles and food jars Window glass, light bulbs, crystal, ceramics, ovenware Rinse bottles and jars, remove lids, leave labels on. In some programs, separate by color. Paper Newspapers, corrugated paper, office paper, computer paper, magazines, catalogs, "junk" mail Waxed paper, coated paper, tissue paper Separate by type of paper.

  1. The Effect of Different Types of Insulation on Heat Retention

    Compared to the control, aluminium foil is a better insulator, which shows that it would absorb heat slower than a normal cup with water, would do. Bubble wrap is the second best insulator as it contains air pockets, which either traps or slows down the heat energy, as it is radiated from the water into the air molecules.

  2. Investigate and evaluate the differences and similarities in the key features in planning the ...

    Where appropriate, an N.I.C.E.I.C. Inspecting Engineer will make an independent inspection of the installation. If the fault is found with the contractor, he must put it right at no extra cost to the consumer. If the contractor fails to rectify the deficiency the N.I.C.E.I.C.

  1. Investigating what kinds of materials are best at keeping water in a boiling tube ...

    in the diagram below: I will boil some water using the kettle. I will then pour the hot water into a beaker and then into the boiling tube. The boiling tube will be rapped in one of the selected materials, supported by elastic bands.

  2. Sports Equipment -To carry out tests on different types of grip.

    Sprinters wear spikes to get better grip on a running track. Football - studs are used when running to grip the grass in particular whilst turning. And the studs get concealed into the ground to make it definite you have good grip.

  1. A new branch of a major Chinese take away, Wok In, is opening in ...

    different take aways with only one side glued together, and the box should then be easily constructible by using a locking mechanism to quickly connect the box into shape. There is a wide range of different materials to choose from.

  2. My aim of this experiment is to recognize which material is the greatest sound ...

    for my results, by carrying this whole process out three times, and then produce an average results table from which I would then produce a graph out of and distinguish which material is the best sound insulator. I would repeat the process and measure the sound values until I have

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