specific ingredients in a bouncy ball recipe affect a ball’s bounciness? Background Research: Molecules that are made of recurring chemical units are called polymers. The glue used in this experiment to create bouncy balls contains the polymer polyvinyl acetate (PVA). When this is reacted with Borax, the polymer cross-links to itself. Cornstarch, another major ingredient the bouncy balls, acts as a thickening agent. Hypothesis: If the amount of Borax in the solution is doubled, then the ball will
Review of Literature Fabrics Fabrics can be made of natural and synthetic materials. Natural fabrics, like cotton (NY Fashion Center) for example, are found here on earth while synthetic fabrics are manmade (MV Styles). There are many distinguish ways to determine if a fabric is natural or synthetic. Each fabric is different in its own way due to it reaction to heat, its odor, residue and chemicals (MV Styles). Fabrics are seen and used every day and in every way. Synthetic material has been pushed
METHODS OF LONG TERM UNDERGROUND STORAGE BY WILLIAM N, NELSON AND STANLEY A. CATLOW Reprinted by the permission of: MAGNUM ENTERPRISES P. O. Box 621 Ephrata, Washington 98823 INDEX Chapter 1....................................4 Above Ground ...........................4 Chapter 2....................................5 Below Ground ...........................5 A. Ammo Cans.......................5 B. Plastic Bags ...................6 C. PVC Pipe........................6 Chapter 3................
Synthetic and natural fibers are the most essential part in clothes manufacturing. They make up the clothing we wear everyday. Fibers are made up of polymers, which are an arrangement of large molecules that are then made up of groups of even smaller molecules that are linked together to form a large chain structure. The smaller molecules are called monomers, and when they join together larger molecules are produced, making macromolecules (Bailey). Synthetic fibers are made up of polymers giving
INTRODUCTION How fast do different fabrics evaporate moisture? There are many different types of fabrics that are used for clothing. Generally, fabrics are broken down into two separate groups, natural fabrics and synthetic fabrics. Natural fabrics are fabrics that come from plants or animals. Synthetic fabrics are fabrics that are made from man-made materials. Natural fabrics have been around for thousands of years. There were four great fibers in the fabric industry history. They were wool
TYPES AND STYLES OF EYELASH EXTENSIONS INTRODUCTION Over the years, the fashion industry has exponentially grown and for this reason you can have access to different types and styles of eyelash extensions to completely change your look. If you want that glamorous perfect look, the trending perfect hot beauty is an eyelash extension for anyone who wants a dramatic look without mascara. Eyelashes fall in two broad categories, that is, the permanent and semi-permanent eye lashes. Permanent eye lashes
Polymerization: PVC (Polyvinyl Chloride) PVC or Polyvinyl Chloride (Poly (chloroethene)) is a type of plastic used all over the world for a range of things such as pipes, clothing and electrical cables. PVC is considered a thermoplastic resin meaning it resoftens when heated. It’s molecular formula is (C2H3CL)n and is a white powder that’s resistant to oxidation and degradation. However, it can be harmful to the environment but since it’s economically beneficial to many countries this is often overlooked
Recycling means collecting and sorting waste for the purpose of producing new products. In Malaysia, the recycling program was officially introduced on December 2, 2000 and the Ministry of Housing and Local Government (ministry) has determined that the 11 November of each year as National Recycling Day. Recycling process involves a variety of solid waste including plastic. Plastics is the solid waste that cannot be decomposed, so the recycling process of this material can help reduce the quantities
Plastics and Our Environment Works Cited Missing Plastics today play an important part in cutting-edge technologies such as the space program, bullet-proof vests and prosthetic limbs, as well as in everyday products such as beverage containers, medical devices and automobiles. Recycled plastics are used to make polymeric timbers for use in picnic tables, fences, and outdoor toys, thus saving natural lumber. Plastic from 2-liter bottles is even being spun into fiber for the production of carpet
Introduction Plastic has found its way into every house and office, it’s found in many home appliances and office equipment. The reason for increased use of Plastic is that it has replaced Glass, wood and metals and it’s relatively cheap. Plastic is thrown away after its use and that creates a huge problem regarding the disposal of the plastic. This has resulted in the need for recycling plastic in order to avoid its disposal and to re-use it. The first time used plastic is known as virgin grade
Purchasing agility equipment can quickly become a major expense. There are several ways that you can build a course right in your own backyard using materials purchased from a hardware supply store. Building your own agility equipment can be a fun and rewarding experience. Once your obstacles are complete and set up, your dog will be able to practice running the course whenever the desire strikes. Big trial coming up? Now you have a place to run your dog and get him in prime condition to take the
for the polymer molecules in the polyvinyl acetate which makes chains of molecules stay together when you pick them up [2]. The balls will then be tested for durability and quality through a series of tests thought up based on certain conditions needing to be met. Having the balls put through these varying conditions will show how optimal the choice of combination of the reactants used to make the final ball really was [4]. Materials/Methods: Borax Polyvinyl acetate
4. POLYVINYL CHLORIDE (PVC): This is flexible film that has light transmission qualities similar to glass. This material has been used extensively in Japan. While polyethylene sheets can be wide, PVC is narrow which a disadvantage in covering greenhouses is
ingredients used in making slime contain fundamental additives that, when mixed together, cause the thick, gooey, slime every kid enjoys. Polymers are made from several smaller molecules joined by chemical bonds. The polyvinyl allows the mixture to feel slimy. Combing the polyvinyl and Borax together creates a chemical reaction. The mixture becomes cold, thicker, and elastic. This combination mixed together produces slime that is fun and safe for all ages. Glitter is used in today’s society in or
known as poly(ethylene-vinyl acetate) (PEVA), as the name suggest, is the copolymer made up of ethylene monomer and vinyl acetate (VA) monomer. It is produced by addition reaction mechanism with free radical initiation. It has a chemical formula of (C2H4)n(C4H6O2)m. Depending upon the weight percent of vinyl acetate, we get different polymers such as vinyl acetate modified polymer (4% VA), thermoplastic ethylene vinyl acetate (4 - 40% VA) and ethylene vinyl acetate rubber (>40% VA) with the
Paper is a thin, flat material produced by the compression of fibres. The fibers used are usually natural and based upon cellulose. The most common material is wood pulp from pulpwood (largely softwood) trees such as spruces, but other vegetable fiber materials including cotton, linen, and hemp may be used. A stack of 500 sheets of paper is called a ream. The edges of paper sheets can act as very sharp razors, leading to paper cuts. Manufacture Whether done by hand or with a Fourdrinier Machine
especially plastics. Polyethylene, which is the most commonly used plastic, is directly produced from ethylene by its polymerization. Ethylene can also be chlorinated or combined with benzene to produce 1,2-dichloroethane, a precursor of plastic polyvinyl chloride to produce ethylbenzene, which is another important plastic used in the manufacture of polystyrene. Lesser amounts of ethylene are oxidized to produce chemicals containing ethylene oxide,
EFFECTIVENESS OF MOUTHGUARDS IN CONTACT SPORTS “In the United States, about 6 million youngsters take part in some kind of organized sports resulting in about 2 million injuries each year.”1 The majority of all dental injuries are associated with sports. These injuries can be prevented using a mouthguard. The mouthguard is defined as a “resilient device or appliance placed inside the mouth to reduce oral injuries, particularly to the teeth and surrounding structures.”2 There are different types of
pavement maintenance technique in cold weather like in chip seals, slurry seal, cold recycled mix and micro-cracking. There are basically two types of polymer used as a modifier, namely Plastomer and Elastomer. Plastomers polymers like ethylene vinyl acetate (EVA) have high rate of strength gain but shows brittle behaviour at low temperature. Elastomers like SBR and NR shows a very elastic behaviour, stretches to around ten times and quickly return to original shape upon release of stress. The process
Slime, It was one of the most popular trends in 2017, It’s somewhat a trend now. What's so astonishing about slime? Well in my opinion i say that it's a stress reliever, fun to play with, the texture, noises that it makes, and the satisfaction of it. Slime can be fun to play with but can hurt you. What exactly is the definition of slime? According to the dictionary it says it’s “a moist, soft, and slippery substance.” I will be talking about the chemistry of slime. How did slime start to be a