References: Sci. Eng. R: Repts. 2000‚ 28‚ 1–63. of polyethylene=silicate nanocomposite prepared by melt intercalation. J. Polym. Sci. Pt. B: Polym. Phys. 2002‚ 40‚ 1454–1463. nanocomposites. J. Appl. Polym. Sci. 2007‚ 106‚ 2210–2217. J. Polym. Sci. Pt. B: Polym. Phys. 2005‚ 43‚ 488–497. packaging applications
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This leg can also function as a brace for a remaining limb that is lacking some functionality. A socket is manufactured from a carbon fibre sheet‚ and a Patellar tendon bar is used for suspension of the leg. A cosmetic shell is made from polyethylene material‚ and flesh-tone plastic or surface colouring is used to match various skin tones. Thus the prosthetic leg can take on the human form‚ and achieve a believable human colour. For a more comfortable and compatible match‚ a 3D scan is taken
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Tough‚ rigid‚ shatter- resistant softens when heated 1 = PETE (or PET) Polyethylene Terephthalate Commonly used to package soft drinks‚ water‚ beer‚ juice‚ sports drinks and other beverages‚ as well as edible oils‚ salad dressing‚ peanut butter‚ various condiments and sauces‚ and non-food products like household cleaners and personal products. Semi-rigid‚ tough‚ and flexible 2 = HDPE High-Density Polyethylene Commonly used for milk‚ cider and water jugs‚ as well as detergent‚ fabric softener
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polyacrylonitrile and their scales are made of nylon. If you like to play with robots. The little robot may be made of polystyrene. Polyethylene and polysioprene may can made for their wires. Plus‚ epoxy resins are often made for circuit boards inside of the robbits. Some kids may like use the fence with this oh-so discreetperiscope that is made out of polyethylene to see something fun. Along with neato pinwheel‚ do you know what made out of it? Its vanes are made out of a composite material‚ most
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ABSTRACT For many years‚ the use of natural polymers for the fabrication of packaging materials has been an interesting alternative to replace non-biodegradable polymers which are normal components of these materials. The core problem of these starch based plastics is their hydrophilic character and the fact that they tend to become brittle with ageing. Unmodified starch is too much hydrophilic to be used as food packaging material. Chemical modification must be carried out in order to make them
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takes too much energy and they create environmental hazards. The only problem is that plastic is cheaper and create less landfill waste than paper bags. Plastic bags are made with polyethylene. 80% of polyethylene is made from natural gas; a non-renewable resource. According to the Boustead Consulting Association polyethylene uses less water‚ oil and energy. Plastic bags use 40% less energy than paper and plastic sacks. The alliance says‚ they generate 80% less solid waste. Donna Dempsey
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manipulated into Polymers. Polymers are manufactured into five types of plastic. One being plastic bags which is called Polyethylene. Raw Polyethylene can be made into any shape‚ size‚ form‚ or color. It’s water tight and can be printed on. The Polyethylene is heated to about 340 degrees Fahrenheit in a machine that pulls a long thin tube of cooling plastic from the Polyethylene. The tube has a hot bar dropped on it at certain times‚ depending how long or big the bag was going to be. The hot tube
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chemical properties. 2002:17 3 4 Which polymer is made by the polymerisation of methyl methacrylate? CH3 H2C= C—COOCH3 methyl methacrylate 2003:11 1 5 The flowchart shows the production of polyethylene. (b) Describe Process Y. 2003:17(b) 3 6 A sample of polyethylene was produced by Process Y. The following graph shows the distribution of molecular weights of polymer molecules in the sample. (c) Why is a range of molecular weights observed? 2003:17(c) 1 7 Write
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045 2.60 2.40 - 2.50 Annealed Steel (As) – Specimen 2 Width (mm) Thickness (mm) I II III Average I II III Average Before 10.24 10.13 10.10 10.16 3.07 3.08 3.09 3.08 After 8.11 8.08 - 8.095 2.32 2.34 - 2.33 Polyethylene (PE) – Specimen 3 Width (mm) Thickness (mm) I II III Average I II III Average Before 10.12 10.11 10.15 10.127 3.29 3.31 3.27 3.29 After* * = no measurement required Log Sheet 1. Plot the stress-strain
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According to Rob Garner‚ two possible ways of protection include using hydrogen and polyethylene to shield astronauts from the harmful effects of radiation. Hydrogen is a great form of radiation shielding because it absorbs the particles well. Hydrogen is normally found as a single electron and proton‚ causing it to be a great radiation shield
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