Plastic materials - There are many different types of plastic, depending on the kind of monomer, the length of polymer chains, and other added compounds.
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. - 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) . 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. PET is light, clear or transparent with high gloss (sparkling 'crystal clear'), hard and wear-resistant. It is also a good barrier to gases. Polyethylene (= Polythene) is synthesised from ethylene. It is among the most important and versatile of the hundreds of commercial plastics. Polyethylene is usually translucent, tough and unaffected by water and a large range of chemicals. It is used in a wide variety of applications, because it can be produced in many different forms. The three general classifications of this plastic are low density, medium and high-density polyethylene. 2. HDPE (High-Density Polyethylene) HDPE has little or no branching. This
Existing product research
Jahli Tray Coffee Table Jahli is Indian style furniture. It's size is 110cm X 60cm X 47cm . It is made from sheesham wood; it is a very heavy, hard wood and has a natural rustic look, which in some homes will look very effective. It many features which makes it eye catching, these include old fashioned hinges on the corners of table. These hinges are matching to the handles of the four drawers. These drawers are cleverly designed and made because two of the four drawers have been sized to hold magazines. The other two drawers are the same size as each other and could hold remote controls, or any other bits and bobs. All these features contribute to its price tag of £299. Existing Product Research Balmoral Coffee Table It's size is 106.5cm X 51.0cm X 45.1cm. It is made from mahogany; it is very good for crafting by hand or machine and has a unique reddy colour when freshly cut. This table doesn't have any distinctive features, however mahogany can be expensive, therefore this particular table is priced at £359. This table will slowly become damaged over time if kept in sunlight, so inevitably will not be suitable for conservatories, but it would be very effective in a modern living room, dining room or a side piece for a designer bedroom. Belly Nelly Small Coffee Table "Belly Nelly is a company built on a philosophy of quality, value and service that is second to
Analysis of Existing Products.
Analysis of Existing Products In the design brief I had stated that I will create some kind of thing which will enable me to keep my books cleanly organized and safe. In the past days I have searched on the Internet and in my surrounding community for existing products, which keep books organized and safe. All the sizes are rounded. All the sizes are in inches. The different types of objects/things I have found are: * Open Bookshelf * Closed Bookshelf * Filing Cabinet * Portable Bookshelf * Multi Purpose Bookshelf Below I have described about the products I found for each specific objects. Design/Theme: Open Bookshelf Materials: Open Bookshelf can be made out of basically anything. Wood, Metal (Steel), Marble, Plastic, Glass are all the materials used for making a bookshelf. But the most common material used is Wood and Metal. These is because they are the strongest materials among listed and also are available in great quantities. Functions/Purpose: The function and purpose of a open bookshelf is to keep books. When books are kept without good care, they usually get in bad quality. Another reason the bookshelf does is that it allow the user to easily find his book, rather than going through piles of books. Durability: Since open bookshelves are made from different materials, it depends on what they are made from. If they are made from wood, the durability is
Physics of an amusement park "Ocean Park".
Physics Visit Coursework Introduction On Friday 20th, February 2004, my physics class and I went to the amusement park "Ocean Park" for my physics visit coursework. While there, I observed many attractions which had an appreciable amount of physics related aspects included with it. Two attractions I found most appealing were the Atoll Reef and The Dragon. The two aspects The Atoll Reef is Ocean Park's fish aquarium, the attraction which draws the largest amount of spectators. The aquarium is the home of many tropical fishes, endangered, rare and normal, giving them a habitat where they can safely live without the threat of predators. Apart from letting the public view their collection of different fish, Ocean Park tries to educate the visitors about respecting the environment and saving endangered species. Aspects related to physics I could discuss regarding the Atoll Reef are: the energy required to heat the water in the aquarium to a safe, uniform temperature for the fish to live in, the pressure exerted by the water on to the glass panel, the Young's modulus of the panel, and why that kind of glass was chosen for it's material properties. The Dragon is Ocean Park's first ever built roller coaster. Roller coasters are essential to every amusement park because it's the majority of people's favorite ride; the high speed, steep drops, thrilling loops, and unexpected dips
3. In what ways do the material conditions of city life shape and inform the narrative of either Oliver Twist or Brick Lane.
Essay Question on the city 3. In what ways do the material conditions of city life shape and inform the narrative of either Oliver Twist or Brick Lane. Having read both Oliver Twist by Charles Dickens and Brick Lane by Monica Ali, I am going to concentrate the city question on Brick Lane. Brick Lane tells the story of Nazneen, an eighteen year old moved to London from her rural upbringing in Bangladesh to Tower Hamlets, a close tight community of Bengali families living in blocks of flats struggling to make their way up in the city to earn sufficient money and a civilised upbringing for their children, yet still yearning to go back to their home land. Nazneen is married to Chanu, twenty years older than her, he is educated yet earns his money working as a taxi driver. This novel has clear descriptions of city life, the diversity of the people within and how Nazneen interprets the city from her point of view. There are many ways in which the material conditions of the city are described in this novel, the different areas of the city of London are described from the block of flats where Nazneen lives to the big office blocks in the city centre. City life in this novel begins with Nazneen describing the 'Tattoo lady' who lives in the block of flats opposite her, from here we become familiar with the lack of space and understand the very little room they have in the
Material Selection for Oil and Gas Material 3
Question 8 Select a list of materials to fabricate a 2 m diameter by 4 m tall pressure vessel to be used in a processing stream in the Syncrude plant. The operating parameters are such that the environment is acidic, pH=4, there is a presence of oxygen and the tank contains a brine comprised of sulphate ions and bicarbonate ions. It operates under constant pressure and at a temperature of 45oC. Solution For this question, safety criteria for this very critical because of the high human risk involved. The following conditions should be used: ?f ? 0.20 KIC ? 120 MPaVm We made the following assumptions: Constant well pressure of 2500 kPa Constant temperature of 45oC Thickness of pressure vessel is 2.5cm. Diameter of vessel is 50 cm Hoop Stress We must calculate the hoop stress to get a better understanding of the internal pressure. We used the following to calculate this: For the considerations, we have stated the primary, secondary, and other considerations: Consideration Criteria Primary Yield Strength () required for the hoop stress and fatigue Secondary Corrosion because of the low pH value caused by brine and other acids; SCC due to the corrosive substances and high pressures; Formability to allow for ease of fabrication of material; Creep Resistance because of constant pressure and temperature; Other Weldability is also an important factor because
My objective is to find out which material is the best to use for a football boot. To do this various test were done to see which material would be best. These tests were durability, friction/grip, strength and waterproof
Testing what material is the best for a football boot My objective is to find out which material is the best to use for a football boot. To do this various test were done to see which material would be best. These tests were durability, friction/grip, strength and waterproof. Durability Introduction Durability is one the main properties for a football boot as with good durability it means the shoe will last longer and won't wear down easily. A test was done to see which material has the best durability. Hypothesis I think that rubber will have the best durability while I think sponge will do the worst in the durability test. Apparatus * Materials(sponge, leather, foam, rubber and fabric) * Sandpaper Method The apparatus was set up as instructed. To the test for durability sandpaper would be rubbed against each material. To make it a fair test each material would be rubbed with the sandpaper and they would be rubbed the same amount of times (20times). Results Materials After 5 rubs After 10 rubs After15 rubs After 20 rubs Rubber Nothing happened Discoloured Discoloured Discoloured Fabric Nothing happened Nothing happened Nothing happened Nothing happened Leather Nothing happened Nothing happened Discoloured Discoloured Sponge Disintegrated ------------ ------------ ------------ Foam Disintegrated ------------ ------------
Can heat loss be minimised by using materials such as polystyrene, fur, felt or aluminium as insulators?
Investigation Question: Can heat loss be minimised by using materials such as polystyrene, fur, felt or aluminium as insulators? Hypothesis: I predict that the best insulation material will be polystyrene. As it contains many air pockets that will act as an aid to keep the heat contained as much as possible. Conduction is the flow of heat through matter form places of higher temperatures to places of lower temperatures without the movement of the matter. Particle vibration from the energy can be explained using the kinetic particle theory. Good conductors such as metals have a sea of electrons which can easily flow and carry heat energy. Insulators also have electrons, however, they cannot move because of the bonding between and within the electrons. Convection is the flow of heat through a fluid from places of higher temperatures to places of lower temperatures by the movement of the fluid itself; a fluid can be liquid or gas. Radiation is the flow of heat from one place to another by means of the electromagnetic waves. There is no material required for the heat to travel through (conduction) or with (convection), the colour and finish of the surface of the radiator effects the emission or absorption of radiation. o Aluminium is a shiny bright material therefore it will allow more heat to escape. o Felt is a dark, matt material thus allowing more heat to be
Technology Product Evalution.
Technology Product Evalution Introduction I am looking at the dishwasher as I am very knowledgeable on it. I have a number of good ideas on how to improve the washer. I am also interested in electrical devices such as this. Also my father manages a company which deals with such appliances. Description This dishwasher is mahogany brown in colour. It fully integrates with our fitted kitchen. On the face of the dishwasher is a drop-down door containing a mahogany panel. On the top part of the front panel is the function knob and 3 function buttons. I have explained how these operate on the opposite side of the picture. Inside the washer, it is mostly water powered with the exception of the heating elements. There are 2 stacking racks inside with a cutlery basket situated in the centre of the bottom rack. There are 2 spraying arms which are powered by water pressure. There is a sound dampening layer of material below the lid of the washer. The dishwasher is 954mm in height and 600mm x 500mm top surface area. The is a 150mm gap between the washer and the floor. It is supported by a block of kitchen integrated wood. Justification I have chosen this product because: ) A dishwasher is almost a necessity in today's society due to the high standard of living. 2) I know a substantial amount of information on the product to give a fairly accurate evaluation. 3)
What factors affect the cooling of hot water in a container?
Science coursework investigation - On what factors affect the cooling of hot water in a container? Harpal Loyal 11A Hypothesis: In this investigation I am going to look into the factors, which affect the heat transfer of hot water in a container. Heat will travel from a place that is hot to somewhere where it is cold. There are three methods of heat transfer, Conduction, Convection, and Radiation. In conduction heat energy is past along from molecule to molecule. Molecules move more rapidly as they get hot and collide with neighbouring molecules passing along the energy. This is only possible with solids because the heat can only be conducted through molecules next to each other. In convection hot molecules move carrying energy with them. Therefore this only works in liquids and gases. As the fluid is heated the molecules vibrate more quickly and move further apart. In radiation heat energy passes directly by means of waves from a hot object to the cold. Therefore it is the only kind that can pass through a vacuum. The factors, which I could investigate, are: * Volume of water * Surface area * Initial temperature * Material of container wind factor (air movement) * Insulation type * Size of container * External room temperature * Stirring or agitation The different insulator types could affect the temperature, depending upon the