Thermoset plastic Essay Example for Free

Thermoset plastic Essay In this project I will design an apparatus which will hold a test-tube, basically as a showpiece. Even though test tubes are usually used to hold variables in science, I will be using it as a flower holder. My new boss at the company has asked me to make a flower vase, and has decided that the newest item in the store will be a test-tube flower vase. He has asked me that it has to be commercially viable, which will totally depend on my target audience. My main target audience in this project is the general female adult, because it would be the best area to sell a flower vase. This is because showpieces in stores are mostly bought by the female adult who wants to make a place look good by its presence. Im choosing this audience because they are the ones that most commonly use vases, and it is the place where I can make the most money. In order to do this, I will go through a whole process which is in this project. I will start of with researching existing examples, researching materials and I will go on to survey a group of people and I will go on to use the results in order to plan my design. I will go on to create my design and then I will evaluate my whole project. Overall, I will follow the design cycle in this project to create my flower vase. The tools and materials that I will use will all come from the DT lab. Materials Research In this project there are three main materials that we have the option to use, these being wood, metal and plastic. Below is some detailed information on all these types of materials: Wood: Wood is a main source of creativity, because it can be shaped and even manipulated in some cases. It is a primary way of creating apparatus/tools because it used to be abundant. Nowadays, there is a threat of it becoming rare, but because it is already such a used material it is not something that is hard to stop, especially because of the reason that the universal population will never decrease over a period of time. There are three main types of wood, namely hard wood, soft wood and man made wood. All types of wood must be seasoned before they are used, meaning that the moisture must be removed so that it is a solid. Soft Wood: Soft wood mainly comes from evergreen or conifer trees (right). They also come from trees like pine, cedar, fir, hemlock, spruce, yew and redwood. Softwoods are mainly softer than hardwoods; however there are some exceptions i. e. yews are much harder than hardwoods. Softwoods are categorized differently from hardwoods because of their different microscopic structures. There are two main elements that form the structure of softwood, namely tracheids and parenchyma. Uses: It is the main wood source used by man, because of the variety of uses it has. Softwood is the main material construction of buildings, in furniture, in windows, in mouldings, in doors and a lot of other millworks. Also, it is used for the production of paper and is turned into man-made wood i. e. MDF. Hard Wood: Hard wood trees on the other hand, mainly come from deciduous trees (right) . However, there is a group of hardwood trees that arent deciduous, known as angiosperm trees. Conducted experiments show that hardwoods are higher in density than soft woods but it has to be kept in mind that there are some examples of both groups that considerably overlap, i.  e. hardwood Balsa is softer than regular softwoods, and yew is in the opposite direction. Hardwoods can be differentiated from softwoods because of the following Characteristics. They have broader leaves   The contain enclosed nuts/seeds i. e. acorns Compared to softwood, hardwoods have a much more varied existence of species, almost a hundred times more. This also means that hardwood is used a lot more than softwood, especially in exterior work. It is also used to make day-to-day utensils, as flooring, for constructing buildings, for furniture and a variety of different things. Man-made wood: There are three main types of man-made wood, MDF, maisonette and plywood. MDF boards are known as Medium-density fibreboards. It is made by first breaking down softwood to wood fibres, and then two substances called wax and resin are combined with it. This is then used to form panels by applying on it pressure and high temperature. It is a material mainly made up of sawdust. Plywood, another example of man-made wood is created from thin sheets of wood veneers. Each of these sheets are then stacked together in a method called cross-banding. Again, they are bonded under heat and huge amounts of pressure. One of the reasons why plywood is favoured over plain wood is that it is resistant to warping, cracking, and shrinkage and is very firm. Maisonette wood is mostly used in the constructing of houses, which is why maisonette houses are existent today. Maisonette houses are basically houses connected to apartments (above right), which is where the maisonette wood is used. Metal: Metal is derived from the Greek word Metallon and is a readily formed element with positive ions which make up metallic bonds. On the periodic table, a diagonal line from polonium to boron divides up the metal elements (left). Elements below the line are metals and elements above the line are non-metals. However, elements along the line are known as metalloids or semi-metals. Ferrous and Non-Ferrous Metals: There are mainly two types of metal, known as ferrous metal and non-ferrous metal. The word ferrous is derived from the Latin word Ferrum which means containing iron. This shows that ferrous metals are the ones that contain iron whilst non-ferrous dont. This is a common way of dividing metal because it is the easiest way to decide which kind of metal you need, because the differences between these two groups are clear and obvious. Ferrous metals are the ones that usually rust, and they are the stronger and heavier. On the other hand, non-ferrous metals are the ones that dont rust because they dont contain iron, and are lighter and softer. Non-ferrous metals are those which are a mixture of metals (known as alloys) and do not have iron. Examples of them would be copper, aluminium and brass. Brass is an example of an alloy because it is a combination of copper and zinc. Examples of ferrous metals include: tin plate, cast iron and mild steel. Plastic: Plastics are a general group of apparatus that are created by the combination of oil, salt, air and water. Plastics are defined as a group of (natural) organic or synthesized materials that can be shaped when soft and later when they are hardened. The word plastic is derived from the word plasticity because of the fact that many of them malleable. In other words they are capable of being extended or shaped by the force of some kind of pressure. When applying plastic, there are two main types: thermo-set plastic and thermo plastic. Thermoplastic: Thermoplastics are characterized as being soft and pliable when heated. This means that it will melt when heated and it will turn into a glassy, brittle state (like that of ice) when cooled down sufficiently. Thermoplastic heat can easily be shaped by heat. This kind of plastic is usually used for packages, especially ones like PBS, polyethylene, polystyrene and acrylic (right). Thermoset plastics: Thermoset plastics on the other hand, are the complete opposite. They are stronger, much harder and heat resistant. They cannot be shaped with the use of heat, but at the same time they are very brittle pieces of apparatus. These kinds of plastics are usually in the form of a liquid or powder before being designed and moulded. Compared to thermoplastics, thermosetting plastics are harder and are best suited to higher temperatures. Like thermoplastics, thermoset plastics cannot be recycled by re-melting or remoulding the plastics. Examples of thermoset plastic include: polyester sine, poxy resin and melamine (right).

Chromium :: essays research papers

Chromium Chromium is a very hard, brittle, gray metal, which is sometimes referred to as Siberian red lead. It does not rust easily and becomes shiny and bright when it is polished. The shiny trim on our automobile bumpers and door handles is usually electroplated chromium. Most chromium comes from something called chromite which is a mixture of chromium , iron, and oxygen. Chromite is a common rather ordinary black mineral that no one really noticed until more recent times. Nearly all the world's supply of chromite comes from Zimbabwe, Russia, Turkey, South Africa, Cuba, and the Philippines. The United States imports almost all its chromite. Chromium is added to other metals to make them harder and more resistant to chemicals. Small quantities mixed with steel make the metal stainless. Stainless steel is used to make cutlery and kitchen equipment because it does not rust easily and takes a mirror-like polish. This steel contains about 13 percent chromium and 0.3 percent carbon. The hardness of steel can be increased by adding small quantities of chromium to it. Chromium steel alloys (mixtures containing one or more metals) are used to make armor plating for tanks and warships. They are also used for ball bearings and the hard cutting edges of high-speed machine tools. Nickel is highly resistant to electric current and is often added to chromium steels to make them easier to work. For example, stainless steel sinks can be pressed out from flat sheets of steel that can contain 18 percent chomium and 8 percent nickel. When nickel is mixed with chromium, the resulting metal can stand very high temperatures without corroding. For example, the heating elements of toasters can be made from an alloy that is 80 percent nickel and 20 percent chromium. This metal operates at a temperature of about 1380 degrees Fahrenheit (750 degrees Celsius). Chromium was discovered in 1798 by the French chemist Nicolas Vauquelin. He chose the name chromium from the Greek word chroma, which means color. Chromium was a good choice of name, many chromium compounds are brightly colored. Rubies are red and emeralds are green because they contain chromium compounds. Some of the brightest colors in the artist's palette contain chromium. Chrome yellow is made from a substance which contains chromium, lead, and oxygen. Zinc yellow contains zinc, chromium and oxygen. Chrome red is another chromium compound. Chrome green is used in paints and in printing cotton

Literature as Knowledge for Living Essay

According to Vera M. Kutzinski in his introduction, Ottmar Ette was sent to the east of Germany after the reunification of Germany to strengthen academic institutions. There, universities were going to receive the so-called â€Å"Initiative for Excellence†, which would make German universities more competitive. But, when it came to application, a little percentage of humanities institutions were selected, because the focus was actually on science and technology. This fact was what fueled Ette to take a turn on his work and started to work on not trying to convince why literary studies were better or worth more attention or research, but to make skeptical see why society cannot do without literary studies. Ette’s official work on this matter is titled Lendemains, where he focuses on literary studies as something that society needs to survive and the relations established between human beings in literary terms. Below is presented a short review on his evaluation on this matter. Ette argues that literature and language do not seem to deal with language about life any longer. Instead, scientific and technological academic fields have taken over. So what has to be done for the humanities to deal with life again would be, according to him, reorientating the idea of life, which should be based on making society see how the humanities can improve how human beings live with one another, and this should be done together with the biosciences, creating an easily understandable language which allowed scientific and literary discourses to work together as equals. Ette also discusses how biotechnology and natural-scientific fields of study have become the â€Å"sciences of life† because it has been socially accepted, since their subjects of study have to do with life. And also how literary scholars do not pay attention to the humanities losing ground on this respect. So, according to the author, the concept of life should be changed from a bio-chemical, biophysical, and biotechnological and medical, to a cultural-literature-oriented one, as other scholars also maintained before (Leo Spitzer and his ideal of literature being the science that seeks to comprehend the human being to the extent to which he expresses himself in words and linguistic creations). Then, the author introduces the concept knowledge for living as the kind of knowledge inherent to literature, this is, literature having knowledge about or of life. But then, it comes the following question: how to acquire this knowledge for living? This could be answered (according also to Wolfgang Iser’s work) by the act of reading, this is: reading fictional literary pieces and having experiences through it that make the reader gain a kind of knowledge that he/she would not experience in their own life otherwise. This introduces the concepts of intratextuallity (the knowledge of living that characters of novels possess) and extratextuallity (the ways of acquiring certain cultural and sociohistorical knowledge for living), both of which influence the reader culturally, in their behavior, their life, etc. depending on what they read. These two dimensions of the knowledge for living constitute, at the same time, the knowledge for living together, which is acquired by the readers through literature as the conditions for people to live together which have been shaped all throughout history. In these terms, the author mentions Roland Basthers’ work Comment vivre ensemble, and how literary analysis could connect literature and life. This is, for example, how to live (in the novel), how certain people have lived (in biography), etc. In addition, these knowledges should take into account different contexts and cultures, gender and social differences, in order to be universal and valid. The conclusion of the author is that the humanities first need to realize the potential that they possess concerning knowledge for living which, in conjunction with the natural and social sciences, would give new perspectives for the exploration of art and literature as knowledge for living.

Frankensteins ambition - 877 Words

Topic #3 Victor’s driving, obsessive ambition ruined his life and led to his own death and the murder of his loved ones. Illustrate how ambition affects not only Victor and Robert Walton, but also the creature in Frankenstein. Thesis Statement: Ambition and the quest for knowledge is a fatal flaw in the characters of Victor Frankenstein, Robert Walton, and the creature. In Mary Shelley’s 1818 novel, ‘Frankenstein’, a recurring motif of ambition and the quest for knowledge is present among the characters of Victor Frankenstein, Robert Walton and the creature. Victor’s obsessive ambition is his fatal flaw, ruining his life and leading to the murder of his loved ones and eventually his own death. Robert Walton shares a similar ambition†¦show more content†¦Victor begins to possess an unnatural drive in his quest for knowledge where he begins intense study and experimentation, â€Å"These thoughts supported my spirits, while I pursued my undertaking with unremitting ardour. My cheek had grown pale from study, and my person had become emaciated with confinement† eventually isolating himself from his friends and family. As the seasons passed Victor’s obsession with his studies continued to grow, â€Å"And the same feelings which made me neglect the scenes around me caused me also to forget those friends who were so many miles absent, and whom I had not seen for so long a time† highlighting how his ambition is a fatal flaw, neglecting the outside world and his loved ones. Victor’s ambition to research and attempt to create life drains him of health and sensibility, â€Å"Every night I was oppressed by a slow fever, and I became nervous to a most painful degree† which is ironic to the goal he wishes to achieve. Shelly’s use of irony illuminates how Victor’s obsessive ambition has become a fatal flaw. Victor’s blindness to what his end result will produce is immediately revealed when his final work is a hideous creature. Victor, through repulsion, neglects caring for the creature in its blank slate, gradually fuelling the ambition it feels for revenge. With the monster isolated, he begins to learn, â€Å"I learned to distinguish between the operationsShow MoreRelatedVictor Frankenstein Loss Of Innocence Analysis1768 Words   |  8 PagesVictor’s mother sadly dying. Her last dying wish was to have Victor and Elizabeth to espouse. Subsequently, Victor is sent to university in Germany still grieving his mothers death. He sadly leaves Henry to explore natural philosophy and fulfill his ambitions to surpass nature and become compassed with power. For two years Victor isolates himself from reality cutting all ties from family and society. Instead of ameliorating society, Victor is exhausted by the thought of being better than nature. 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