Polystyrene

From our [processed] results, we can conclude that the polystyrene cup served as the least effective conductor of heat, the tin mug coming in at a close second. The most effective material for heat conduction was the plastic mug. At the beginning of the tests, all of the water in the cup declined in temperature at a steady, even rate, but once one minute had passed, they had all started to cool down at very different rates. The plastic trails held the most change, and the water being used for that experiment cooled a lot faster than the other trails; almost two times faster than the water in the polystyrene cup. The polystyrene and tin mug were very similar; from a standpoint that is observing the cooling rate of the water. They were almost identical in temperature, until three minutes had passed when they both started to cool faster/slower than the other; but even then, the gap between the different temperatures was still extremely close. Can you explain the relationships, patterns or trends in your results? Try to use some scientific ideas to help explain what happened. Looking back on the experiment, the equipment used may have had an effect on the test results. For example, the plastic cup had the lowest temperature; this…

Polyvinyl Acetate ( PVA ) • PREPARATION It is prepared by heating vinyl acetate (Obtained by treating acetylene with acetic acid in presence of HgSO 4 catalyst) in the presence of benzoyl peroxide or acetyl chloride as catalyst • PROPERTIES It is colorless, transparent material resistant to water, atmospheric oxygen and chemicals. It is fairly soluble in organic acids and organic solvents. Ithas a good heat resistant but slightly yellowish takes place after prolonged storage above 120C, acetate…

life. Polymers can be found in nature, such as starches, proteins, and cotton. They can also be man-made, such as plastics, Kevlar, and Teflon1. Polymers can be linear, branched, cross-linked, and network1. Polymer are used in medicine, consumer sciences, industries, and sports1. Properties of polymers can be altered by chemicals and structural changes and how the polymer is processed. Polystyrene is an additional polymer, which is a polymer in which the monomers simply add together with no…

Moreover, Teflon can used in chemical manufactures such as hoses that can endure very high erosive substance and sometimes, it need to move at very high of levels heat. Teflon have coating in the inner pipe and it used in erosion resistance and flexibility. Every hose will break over time, but those hose that have Teflon coating in the inside can be broken slowly than any other hoses that made of other materials because those materials do not have the same feature with Teflon. Also, Teflon…

This is accomplished with diuretics, dialysis, and ion-exchange resins such as sodium polystyrene sulfonate (Kayexalate). Kayexalate, administered orally or rectally, binds potassium in exchange for sodium, and the resin is excreted in feces (Lewis, 2014, p. 297). First, the assembly of the enema bag with appropriate solution and rectal tube. Next conduct hand hygiene and apply gloves. Provide privacy for the patient and raise bed to appropriate height and left side rail. Then assist the patient…

ANALYSIS OF RESULTS: The limiting factor of area is the size of the polystyrene cup used in the experiment. Each of the polystyrene cups was the exact size in order to be able to determine how different amounts of fertilizer affected the duckweed growth. Hence, the factor of size could not be investigated as each different amount of fertilizer was exposed to the exact same area. This can be linked to the literature review that discusses how the area where it is growing affects duckweed growth.…

against any means of heat loss to the surroundings. This data is then compared to a control, which is a cup of hot water in a polystyrene cup without any sort of insulation and protection against heat transfer to determine the effectiveness of the thermos in regards to heat loss via conduction, convection and radiation. Background Physics: Conduction: Transfer of heat through a substance as a result of collision between neighbouring vibrating particles, usually in solids, metals…

construction of a shade ball & polystyrene sheet, reason behind construction of shade ball & polystyrene sheet are that water shortage main reason. Water shortage is five reasons are given: 1. Unequal rain fall 2. Population 3. Required domestic water 4. Water table decrease India is topical country and rainfall is not same all places due to that reason there is always certain crisis of water. Population increase day by day there is more and more demand of water. Due to continuous pumping…

What is Styrofoam? Styrofoam is a brand of closed-cell extruded polystyrene foam currently created for thermal insulation and craft applications. Dow Chemical Company retained and produced the Styrofoam. Through petroleum product known as styrene, Styrofoam was created. The styrene is amended into a clear molten mass of polystyrene through a complex chemical process known as polymerization. It would become a hard plastic if it were left to cool. Disposable eating utensils are created from this…

DTDP-activated DNA handles in Tris buffer at pH of 7 overnight at room temperature. Coupled DNA-protein chimera is then diluted to ~ 5 nM and stored at -80 C°. 5.3.2 Single Molecule Force Spectroscopy Using Optical Tweezers The optical tweezers experiments were carried out using MiniTweezers purchased from Smith’s Lab according to previously reported method. In each experiment, 1 μL of 0.5% streptavidin modified polystyrene beads (diameter of ~ 2 um) was diluted to 3 mL and injected to the…