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
mature technology now in North America. Products: Rubber Crumb (sellable product – serves as raw material to many many industries) Finer synthetic and natural rubber (obviously after treatments) which can be used in Tiles and tile adhesives, mixing with asphalt, sports surfaces, carpet underlay, noise and vibration insulation, playgrounds and matting. Rubber crumb is also used in new tyres, devulcanisation for low-tech pressed or extruded rubber products, commercial flooring, traffic control products
Rubber has nineteen other chemicals that make it up, and not excluding any they are: carbon black, neoprene, EPDM, nitrile butadiene, styrene butadiene, isobutene isoprene, isoprene (natural & synthetic), chloro-sulfonyl-polyethylene, acrylate-butadiene copolymer of acrylic ester and acrylic halide, polyethylene-apdate, poly(oxy-1, 4, butylene)ether
History/Background to Problem: What is a tire/tyre? A tire is a ring-shaped covering which is made from synthetic rubber, natural rubber, fabric, wire, black carbon and chemical compounds that is used to fit around a wheel’s rim. Tires are used in most automobiles, motorcycles, airplanes and bicycles. Most citizens of Trinidad and Tobago use some means of transportation that used tires. In the morning you will see them waiting for maxis or taxis or stuck in traffic for many hours along our nation’s
The intent of existing investigation was to formulate nitrile butadiene rubber (NBR)/high density polyethylene blends (HDPE) blends using industrial waste (MW) and compatibilized by Chloroprene rubber (CR). Results indicated that the minimum and maximum torque increased with increasing HDPE amount in the blends, whereas scorch, and cure time showed the decreasing trend. Increment in HDPE increased the tensile strength, modulus, tear strength, hardness and crosslink density. % tensile strain, % compression
can range from pastels to black. Diamond is a poor conductor of heat and electricity. Until 1955 the only sources of diamond were found in deposits of volcanic origin. Since then scientists have found ways to make diamond from graphite and other synthetic materials. Diamonds of true gem quality are not made in this way (Beggott 3-4). Graphite is another form of carbon. It occurs as a mineral in nature, but it can be made artificially from amorphous carbon. One of the main uses for graphite is for
as the primary source of gasoline; oil and then natural gas replaced coal as the primary fuel for industrial and domestic heating. Petrochemicals derived from petroleum became the source of such chemical products as solvents, paints, plastics, synthetic rubber and fibres, soaps and cleansing agents, waxes and jellies, explosives, and fertilizers. Petroleum fuels also generate a large portion of the world's electrical-power supply. • I will also discuss the exploration for crude oil, and the impending
that claim not to use chemicals may not be completely safe. Most mattress manufacturers don’t comply with the labeling requirements and blow dust in their consumers’ eyes by making false claims. Some mattresses are composed of highly flammable synthetic materials that can easily catch fire. Such mattresses result in an alarming number of fires and related casualties in the U.S. every year. To address the problem, the Consumer Product Safety Commission instituted flammability standards. In order
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
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
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
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
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 properties
What are the advantages and disadvantages of natural and synthetic fibers in clothing? Natural and synthetic fibers are a crucial part in the creation of clothing worldwide. A fiber is a raw material with properties including the suitable length, pliability and strength, all qualities that give it the ability to be used in fabrics and yarns. Fibers consist of different types of polymers, and all fibers are made of polymers. ("Polymer (chemistry)"). A polymer is a large, or macromolecules formed
of the movie next door. This is especially jarring when the other movie involves racing cars or a karate war and you are trying to enjoy a quiet love story. And whether the theater is old or new, it will have floors that seem to be coated with rubber cement. By the end of a movie, shoes almost have to be pried off the floor because they have become sealed to a deadly compound of spilled soda, hardening bubble gum, and crushed Ju-Jubes.
an experiment on how high a squash ball bounces at different temperatures from the same height. Theory When a squash ball hits the wall the air molecules inside the ball heat up and make the ball warm. When they move faster they hit the rubber wall harder therefore makes the ball hotter. The reason why the ball moves faster is that when the ball hits the wall it causes friction and the molecules move faster an hit the wall harder therefore hotter molecules move faster and cold molecules