Synthetic and Natural Rubber Abstract Rubber is an important resource with a wide variety of applications. It can be obtained naturally from the rubber tree, Hevea brasiliensis. It can also be synthesized from petroleum and natural gas. Both natural and synthetic rubbers have their own advantages and disadvantages. Natural rubber is made up the linear chain polymer, cis-l,4-polyisoprene. Styrene-butadiene rubber (SBR) is the most common synthetic rubber. It is a random copolymer of styrene
tested in Vytex Corporation labs in Rochester Minnesota. The team at Vytex wanted to create a new product designed to be a new standardized source of material for natural rubber products that used a chemical agent to reduce natural rubber allergenic properties. The product that was created was Vytex, this product is natural rubber but treated with aluminum hydroxide. Aluminum hydroxide is a strong base that has a protein binding agent. The end product of this process is Vytex, it has very similar
as the natural latex rubber supports proper spinal alignment and fits to your body shape. This reduces pressure on your joints that are further comforted by the natural cushion of the organic wool. 5. Enjoy the longevity of organic mattresses. Organic latex mattresses last longer because they include no polyesters or foams that flatten out or break down. Natural latex organic mattresses outlive synthetics. You should watch out for mattresses claiming to be an “organic blend” or “natural latex” as
Batik Elaborately decorated fabrics and patterns can be seen almost everywhere in the world today. Batiking is a type of decorated fabric, which usually depicts motifs of flowers, birds, butterflies and other natural objects, or simple geometric forms. These designs are rich in symbolic heritage and variety; to date there are over three thousand recorded batik patterns. To perform the art of batiking, one must know a little about its origin, the necessary materials, and the method of creating a batik
produced from coal, and charcoal is produced from wood. Amorphous carbon is the most reactive form of carbon. Because amorphous carbon burns easily in air, it is used as a combustion fuel. The most important uses for amorphous carbon are as a filler for rubber and as a black pigment in paint (WWW 2). There are two kinds of carbon compounds. The first is inorganic. Inorganic compounds are binary compounds of carbon with metals or metal carbides. They have properties ranging from reactive and salt like;
Amazon during the Rubber Boom, there are documented accounts of forced laborers being sick from European diseases, their native wives were sexually assaulted and their children were sold as servants. Survivors experienced a loss of their ethnic identity and forced from their lands. Because conditions were unfavorable to the rubber tappers, Rubber Barons had a constant fear of employees leaving without paying their debts. To insure tappers would not return to their previous homes Rubber Barons “exerted
My ISU will focus on Petroleum, a complex mixture of hydrocarbons that occurs in the Earth in liquid, gaseous, or solid forms. The term is usually restricted to the liquid form, commonly called crude oil, but as a technical term it also includes natural gas and the viscous or solid form known as bitumen. In its liquid and gaseous states, it is also known as Oil, or Crude Oil. Italicized are segments from my ISU or introductions to the planned topics. In my ISU, I plan to dedicate potions of my paper
burned out of existence” (Bloyd 49). However, this destruction has been neglected and overlooked for years. Many people do not understand the long-term consequences of losing the earth’s rain forests. The rain forests have provided people with many natural resources and medicines. The benefits that rain forests provide to people will be destroyed if the depletion continues to be disregarded. No matter where a person lives, even if it is not near a rain forest, the complete destruction of rain forests
(Evans 2004:131). Obsidian from Otumba, Guadalupe Victoria, and El Chayal were also traded to the Olmec people. Obsidian was used to make knives, pottery and even a “grating device used to process manioc” (Evans 2004:135). Raw materials like basalt and rubber were also traded in the region. The Olmec artist was a skilled member of society. Amongst the Olmec art forms, sculpture was very important. The Basalt that was imported into San Lorenzo was...
past few years, and have improved the lives of many children who didn’t have the means to communicate before. DynaVox System Software, or DSS, is designed to be something that is easy to use, no matter what disability you have. The DynaVox has a rubber edge with a 12 inch color touch screen. On the touch screen and as part of the system, you are able to have seventy-seven buttons that have different fonts and graphics. You press a button and it says to whomever you are talking to, what you want
Dreadlocks and Individualism Imagine having the flexibility of wearing your hair loose and flowing. . .maybe pulled back in a simple rubber band, or allowing your long locks to swing expressively in front of your face. It's a natural feeling and style, that epitomizes your love for individualism, they are your Dreadlocks. The art of dreadlocks can be traced back to the Ancient Caribbean islands such as Jamaica where they were fine tuned to perfection by Rastafarians. Here at Syracuse University
one of a kind; no two tie dyes are alike. I have come to be very fond of tie-dye, using it as a means of support, owning my own small tie dye business for years. To design a tie-dye you will make several handmade folds that are secured by string or rubber bands, and then saturated in dye for different periods of time to create different shades of colors. The different folds and tightness’s of the folds create different effects on the fabric there for creating the name tie-dye. This technique is very
There are many forms of artificial contraception. I am going to discuss some of those forms and the Church’s opinion. Condoms, or rubbers, are shaped like a balloon and are made of a special kind of rubber. Condoms prevent sperm from reaching the cervix. They are placed over the male’s erect penis before intercourse. They are 80-90% effective. No prescription is needed to use them. They protect against STD’s. They are more protective in preventing AIDS, then preventing pregnancy. They are not fully
conditions of your environment. Friction is the resistance to motion between two objects in contact with each other. When the resistance related to the tires on the car against the road, it is called traction. The traction points on your car are where the rubber on your tire touches the road’s surface. There are three main traction purposes: putting your vehicle in motion, stopping your vehicle, and changing the direction of your vehicle. The amount of friction that is made is limited even when all the important
thickness of the paddle or any other weapon used, the amount of times the student may be struck by the weapon, and other minor details about other types of physical punishment. The list of weapons that were acceptable for teachers to use include long: rubber hoses, leather straps and belts, sticks, rods, straight pins, hard plastic baseball bats, and arrows. If at the time a teacher did not have his/her weapon, they would often resort to punching, kicking, slapping and shaking as ways to "get children's
car came screeching to a halt as the driver slammed on his brakes. The car struck my torso and threw me onto the damp grass, away from oncoming traffic. I apparently was briefly knocked unconciousious, and distinctly remember the foul smell of rubber burning as I opened my eyes to see the frantic worried look on the drivers face. At the time it seemed as if he was more relieved than I was that I was able to walk away from the scene with just a pounding headache and a few scratches. It seems
at the intricate detailing of the blood-sucker's razor-like teeth, bulging eyes and a pointed nose and ears. "The Creature from the Black Lagoon" used a somewhat new technique of a body suit that the actor wore along with a mask made of latex rubber and foam. Using cooking oil or butter spread on the body and mask gave an enhancement of sliminess added to the monster image. A fairly recent film using heavy make-up effects is "An American Werewolf in London" done by the master make-up artist
practice in the sport of wrestling. In fact, wrestlers have been shedding pounds to qualify for lower weight classes since the NCAA made wrestling a sport in 1928. Prior to any match, disciplined wrestlers will subject themselves to grueling workouts in rubber suits and overheated rooms. The wrestlers try to sweat the weight off, risking severe dehydration all for the sake of winning. Unfortunately, 21-year-old Jeff Reese, and two other wrestlers, died before he reached the wrestling mat. Doctors reported
The origin of makeup dates back to 3100 BC, throughout the first egyptian dynasty. Many Egyptians used unguent, rouge, henna, eyeshadow eyebrow eyelash enhancements, and blue and liquid gold. Unguent is a soft grease that was used as an ointment to get rid of wrinkles. Rouge which is a red colored talc-based powder used to give lips and cheeks a pink or red tint, to give nails a red tint a dye called henna was used. Eyeshadow was applied to both top and bottoms eyelids, the main color used was green
Slotted Weights – these will be used to apply different amounts of forces 4. Rubber Bands (3 of different lengths and thickness) – I will use these to test Hooke’s Law of elasticity 5. Ruler – to measure the change in elasticity 6. A string – to ensure accurate results when measuring My Plan I will start off by suspending a rubber band from the retort stand; I will then apply different forces to the rubber band and see how the elasticity changes, with respect to the weight applied