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Transcript of Bakelite
The reason is because bakelite is a very good insulator.
Even if it is wet the water conduct the electricity (we
all know why) and not the bakelite it self. What about THERMAL? Bakelite does not conduct heat well
instead, it resist heat and flame. The thermal conductivity of
bakelite is around 17Wm k.
CONDUCTIVITY Density A dense phenol formaldehyde resin, bakelite has
a density of approximately 1362 kgm -3 Making Bakelite Due to its density and hardness, bakelite was considered
to be made for coins in the United States when the usual manufacturing material was in shortage. Bakelite, the first synthetic plastic, is made from chemical compound of formaldehyde (HCOH) and carbolic acid or phenol (C6H5OH) to form a phenol-formaldehyde resin. The process of making bakelite involves utilization of three variety of bakelite, Bakelite A, Bakelite B and Bakelite C. functions Since the day bakelite was first patented to sbutitue shellacs, many were impressed of how insoluble and infusable the material is. It's consider to be material of a thousands uses.
Today bakelite is widely use to replace porcelain and other opaque ceramics because of its long durability. Bakelite is also use to make chess pieces, billiardballs, dices and even jewelries. It is the durability, the finishing looks, the light weight and the sound the material makes when it is hit that interest a lot of people to consider bakelite. Because of its electrically non-conductive and heat resistance, it is use as electrical insulator in telephones, radios, kitchenware and even toys. benefits There are several benefits to why industries uses bakelite.
Bakelite is less flammable than celluloid which makes it suitable for insulating wires.
Resistance to solvents and other chemicals.
Usefullness as a protective coating. -1 References Bakelite is a thermosetting resin which means once
molded, it keep its shape through heat and various
acid or solvents. Baekeland used a machine that he called "The Bakelizer" to make bakelite.
Bakelite A and B is the process where chemicals are mixed. Formaldehyde and carbolic acid is pressurized where a step-growth polymerization reaction happen to form the Bakelite C. Bakelite C is the finishing product where the material becomes a thermosetting resin. When left to cool it became extremely hard. Material Step-growth Polymerization Step-growth polymerization reaction is a polymerization process where monomers reacts to form dimers, then trimers and eventually long chain polymers. The Bakelizer History In the early 1900's scientist were working very hard
to find a replacement for the expensive shellac. Belgian chemist, Dr. Leo Baekeland, was one of those scientist. In 1909 he hits a breakthrough when he decided to pressurized carbolic acid and formaldehyde. The substance formed a hard material that is infusible and strong against solvents and acids. He named this material Bakelite. + AX E
V-Shaped (tetrahedral) 2 2 Bonds The cross linking of bakelite is held by an intermolecular force ,the hydrogen bonds, between Hydrogen [H] and Oxygen [O] and has a polar covalent bond. NaOH Industrial & Engineering Chemistry. (1910, December 2). Notes and Correspondence, 545-546. Retrieved April 17, 2010 from the World Wide Web:
American Chemical Society. (1993, November 9). The Age of Plastics. Retrieved April 17, 2010 from the World Wide Web: http://portal.acs.org/portal/acs/corg/content
Boldt, J.(2006). Dictionary. Bakelite Museum. Retrieved April 18, 2010 from the World Wide Web: http://www.bakelitemuseum.de/
Bakelite.(2007, February). Wikipedia. Retrieved April 18, 2010 from Electronic Library on the World Wide Web: http://en.wikipedia.org/wiki/Bakelite
What is Bakelite.(2010, April 4). Wisegeek. Retrieved April 18, 2010 from Electronic Library on the World Wide Web: http://www.wisegeek.com/what-is-bakelite.htm
Information About Bakelite.(2010). Bakelite-Delight. Retrieved April 23, 2010 from the World Wide Web: http://www.bakelite-delight.com/gpage.html
The Story of Bakelite.(2008). Recovered Commodity. Retrieved April 28, 2010 from the World Wide Web: http://www.recoveredplastics.com/bakelite.htm
Bakelite Process.(2003). Classic Organic Reactions. Retrieved April 28, 2010 from the World Wide Web: http://www.chempensoftware.com/organicreactions.htm
Clark, J.(2003) Introducing Phenol. Chem Guide. Retrieved April 30, 2010 from the World Wide Web: http://www.chemguide.co.uk/organicprops/phenol/background.html Because bakelite is a polar covalent material, it has a very low conductivity which means it is not a good conductors of electricity. It doesn't have electrolytes in the molecules.
The hydrogen bondings, the strongest of the intermolecular forces, in bakelite is why it has a poor thermal conductivity and the reason why bakelite is such a strong, dense, and an infusable material. Bakelite is completely a safe material for the environment. It can be recycled but it would have to go through a decent process to eliminate the chemicals in it. However, to recycle bakelite it is best to contact your local Disposal Management.
Today, bakelite is treated more like an antique, because greener and cleaner plastic is evolving in the industrial world, and therefore not many people would throw away a bakelite. The future of bakelite is to treat bakelites as antiques and collector items and it is another way of recycling. Disposal Formaldehyde is a safety hazard to humans through inhalations. It can can trigger watery eyes, affect membranes and trigger asthma symptoms.
Formaldehyde is held by a dipole-dipole interactions. The substance is also a polar covalent bonding. Phenol is a less acidic substance and it is very soluble in water. It has the tendency to lose the H+ and the hydrogen bond holding the subtance makes it polar. The End
by Firman Bancroft