Jessica Hebner Professor Nedra El-Mansouri CHEM111L-011 27 November 2017 The Invention and Effective Utilization of Teflon Teflon is an important invention of the 20th century that has many purposes and is utilized in many products today. In the U.S. today, even if an individual does not know what Teflon is, it is more than likely that they have utilized it in some way. From medical equipment to household items, Teflon is an effective and readily seen substance. The discovery of Teflon grew to be an important resource because of the chemist, Roy J. Plunkett, its accidental discovery, and its usefulness in products today. From Teflon's discovery to its presence in the world today, Roy J. Plunkett was lucky in his findings ("Roy J. Plunkett"). …show more content…
Studies have shown that big changes in temperature do not affect the capability of insulation. In one experiment, materials were set to a high heat of 300 degrees Celsius. After six months in this environment, the substances were cooled to room temperature. The dielectric constant showing the level of insulation had not changed ("Teflon PTFE fluoropolymer resin" 28). Another unique characteristic of Teflon is its weather resistance ("Teflon PTFE fluoropolymer resin" 29). In multiple trials, it was discovered that Teflon was dependable throughout fifteen years of different weather scenarios such as high heat, extreme cold, and ultraviolet rays. The resins coming from its fluoroethylene base also does not react with a majority of chemicals. There are a few exceptions such as fluorine in the gas state, extremely hot alkali metals, and some compounds like chlorine trifluoride and oxygen difluoride ("Teflon PTFE fluoropolymer resin" …show more content…
1). In this study, the researchers were looking at the effectiveness of Teflon vs titanium pistols in the ears from surgery on the stapes (Rajesh et al. 2). One of these prosthetic pieces replaces the stapes inside the ear to increase conductivity of sound within the ear drum (Hain and Micco). All of the patients were suffering from a condition called otosclerosis (Rajesh et al. 1). This condition tends to cause the bones in the ear to lose their flexibility and stiffen (Hain and Micco). In the results of the study, Teflon was the most widely preferred piece, but both Teflon and titanium were shown to be mostly successful in helping the patients hear (Rajesh et al. 7). Teflon's properties such as its chemical resistance and insulation allows it to be used in the body
Technology nowadays is getting more and more dangerous, especially to our ears. Every day we are subjected to videos, text sounds, alert sounds, alarms, and anything else that may be of use in life. These sounds seem to be happening more often which is damaging our ears. There is a solution to this damage though, and that is cochlear implants. These implants will bypass the damaged part of your ear to give you a sense of sound that can be made very useful to the patient. This paper will look into how the ear works, how hearing loss happens, why these cochlear implants are a good solution, how these implants work, cost and ethics related to these implants, and what the future holds for them.
Crandall, Abbey, and Daniel Green. "Chicago Inventions." Chicago World's Fair. N.p., n.d. Web. 28 May 2013.
All fields of science affects the lives of many people, but the inventors are left out. Inventors make many lives more comfortable and convenient. George Edward Alcorn, Jr. was a not so well-known inventor, but he...
Cochlear Implants only restore very limited audibility. When described by formerly hearing Deaf people they compare it to hearing underwater, “fuzzy and timbre” yet still able to discern some
Have you ever wondered why the plastic bag that you left on the porch during winter cracks or breaks more easily than when you left it during summer time but a piece of wood which was left just like the plastic bag has no effect whatsoever? This is because of a phenomenon, which only happens to polymers, known as the glass transition. For each polymer, there is a certain temperature at which the amorphous polymers undergo a second order phase transition from a rubbery and viscous amorphous solid to a brittle and glassy amorphous solid called the glass transition temperature, Tg.1 When the polymer, or in this case, the plastic bag, is cooled below their glass transition temperature, it becomes hard and brittle like a glass but when it is used above their glass transition temperatures, it might have a different effect than when used at room temperature or below the glass transition temperature as normally, different types of polymers like clothes, food packaging, insulations for wires, etc. are either used above their glass transition temperatures or
Titanium and its alloys are used in various applications due to their desirable properties. One of the main sectors where titanium is highly used is in biomedical applications where both implants and tools for surgery make use of this element due to its biocompatibility, low modulus and excellent corrosion resistance. However titanium shows poor tribological properties and therefore it is generally alloyed and undergoes a surface modification to obtain the optimum requirements needed. Biomedical implants are subjected to high clinical requirements, hence before implantation in the human body, a surface modification process is carried out. The aim of carrying such modifications include; to sterilize the implant surface form contaminants before implantation, to increase the bioactivity, increase hardness and hence promotes the reduction in the implant wear rate and the introduction of a passive layer to minimize the ion release in the body.1
The movie Flubber was about a “crazy” chemist who had many inventions, some by the way I would like to have. But the main invention was a rubber “thing” that he named Flubber. There were a few scientific terms that he noted during the movie when inventing Flubber which I will describe below. The words in bold are the scientific terms that were noted in the movie.
These kinds of polymers have both some advantages and disadvantages. Although they are bioactive and biodegradable and provide high comppressive strength, Degradation of such polymers leads to undesired tissue response due to producing acid formation in degradation process. Metallic scaffolds are another method for bone repair and regenaration. They provide high compressive strength and enormous permanent strength. Metallic scaffolds are mainly made of titanium and talium metals. The main disadvantages of metallic scaffolds are not biodegradable and also discharge metal ions. Recent studies in metallic scaffolds mainly focus on biodegradable materials which can be used improve bioactivity of metals such as titanium.
Although attempts to stimulate hearing with electricity date back to the 1950s, the modern version of the cochlear implant did not appear until the 1970s (Wilson & Dorman, 2008, p. 3). The earliest versions relied upon a single electrode to translate sound into electrical impulses and relay them to the brain. Engineers were steadily making progress, however, and by the 1990s implants in young children had become fairly routine (Wilson & Dorman, 2008, p. 3). The modern cochlear implant currently ...
PVC is classified as a thermoplastic, which can be re-shaped in the presence of heat. Situations where temperatures reach up to 160 degrees Celsius (melting point) would cause deformation to the PVC; this would be considered a
"Top 10 Inventions Discovered During WWII." WAR HISTORY ONLINE. N.p., 26 Dec. 2013. Web. 4 May 2014. .
...terephthalic acid solubility in water increased linearly proportional with temperature. This situation happens due to the low dielectric constant nature in supercritical water, making it as a good solvent for non-polar substance like para-xylene. Therefore, it can be concluded that the reaction and yield of the reaction could be adjusted by the modification of reaction temperature. As shown in Table 1, the application of sub and supercritical water, could give a greater yield in terephthalic acid, >50%. However, the industrial implementation always demanding the practical application in terms of energy, nature of chemical and operation cost. Even sub and supercrical water could produce high amount of terephthalic acid, but the temperature and pressure applied in this application was far from safe and commercially practical.
Also, when we put the insulation cans in warn water the water heated up the can. And lastly, in the insulated can experiments, both cooling and heating, when the cans temperature was changed it in turn changed the air temperature
Willis Haviland Carrier invented the first air conditioner in 1902. This was designed to boost the working process control in a printing plant. Carrier’s invention controlled temperature and humidity. The low heat and humidity helped keep the paper dimensions and ink alignment the same. Later his invention was used to populate productivity in the workplace. The Carrier Air Conditioning Company of America developed for the increasing demands. Gradually, air conditioning was used to help increase comfort in homes and cars. Residential sales increased rapidly in the 1950's.
Benz, Francis E.. Pasteur Knight of the Laboratory. New York, New York: Dodd, Mead and Company, 1938. 73-141.