Epoxy Lab Report

In the specimens, all showed a brittle fracture due to how the stress vs strain slope looked and where the Ultimate Tensile Strength was located. Also, how the composited specimens failed look consistent that there were any defects in the specimens. The 0°/90° carbon/epoxy specimen failed in the longitudinal direction because of how the fibers were aligned in that direction. The two ±45° glass/ epoxy specimen failed in the 45-degree direction do to how the fibers were aligned in the specimens. These failures would make sense because composites fail when fiber become unconnected so the epoxy failed first and then cause the fibers to fail next. The fibers individual are weak but when are combined and form a pattern with other fibers is how the strength

In Figure 4, Young's modulus is plotted against yield strength. The diagonal line in the figure represents the material index M= σy/E. Materials below the diagonal line are the best candidate materials because they will remain elastic while providing the maximum conformability. All materials that cost more than $2.20 per pound and have a UV rating of "poor" were eliminated. Also, only materials that can be made through the polymer extrusion process were considered. The candidate materials are listed in Table 1 and ranked by the material index. The current material, TPV, is included in the table for

Discussion As part of the experiment, the percent composition of each component of the mixture was calculated. 51% of the components were retrieved from filtration while 49% of the solvents were retrieved from dissolving the components in a solvent. The original mixture was one globular solid-like structure.

The purpose of this lab was to test four different polymer coupons under a tensile load and determine mechanical properties. This was done under normal circumstances along with the samples soaking in different temperature water baths before being tested. It was found that Nylon 6 was the most brittle sample and that High Impact Polystyrene was the most elastic. It was also found that there is a general trend of materials getting more brittle when colder and more elastic when warmer.

Both natural and synthetic polymers are a vital part of our daily lives. Natural polymers are found in rubber, skin, hair etc. Synthetic polymers are found in nylon, polyester, plastic, chewing gum etc. This lab is demonstrating the properties of the common synthetic polymer polyvinyl alcohol (PVA). It is often used as a thickener or stabilizer cosmetics but also in paper cloths, films and cements.

Epoxy is a kind of polymer material that starts like a liquid and it is transformed into a good condition via a controlled chemical reaction. Due to this transformation in condition, epoxy floor films are usually a robotically strong and chemically resistant kind of flooring. Epoxy floor films are highly adhesive throughout the conversion from liquid to solid permitting them to produce a secure bond with old and new concrete flooring surfaces. You will find a multitude of programs and ways to use epoxy films including epoxy floor fresh paint in industrial and commercial configurations too for films on industrial equipment or machinery. Epoxy floor films may also be used as vapor obstacles over concrete foundations

Hagen M, Ashraf M, Kim I, Weintraub N, Tang Y (2018) Effective regeneration of dystrophic muscle using autologous iPSC-derived progenitors with CRISPR-Cas9 mediated precise correction. Medical Hypotheses 110:97-100

Methods: Due to experimental error in previous labs, we did not obtain the DNA of our original taxa. We then chose to use DNA sequences supplied by the TA from the 2016 and 2017 school year. We picked six fungal taxa obtained from differing parts of English Yew Trees, including its fruit, bark, and leaves. Using the DNA sequences given, we copied the sequence into the BLAST system found on blast.ncbi.gov, making sure to add “fungi” into the organism box and to search for somewhat similar sequences. Once the program obtained the results, we scrolled down to the first result that gave a genus and species name, with an “ITS” in the description. Using the information given in the results, we filled in the information on Table 2, including seq

To calculate the expected number of pipette tips needed per month take the number of pipette tip per sample to multiply it with the average sample analysed per month, 5 x 100 = 500.

How does the elasticity of a rubber band change in different temperatures? Rubber can be made with two things: synthetic rubber and natural rubber. 75% of rubber today is made of synthetic rubber, created during WWII. Natural rubber is made from the rubber tree, the rubber tree’s scientific name is Hevea Brasiliensis. They are primarily found on plantations in Southeast Asia and tropical West Africa. Natural rubber has been used for over 1000 years; it was first used by South and Central American people, who used it to make balls containers, shoes and for water proofing fabrics.

Pressure and abrasion accelerates the deterioration rate of your floors. Damage to your unsealed floors is also caused by a vast array of various chemicals and other substances which can be accidentally spilled on the floor at any time. By adding epoxy protection to your floors, they will become stunning high-gloss features to your property as well as being scratch-resistant, slip-resistant and serious protection from accident related insurance

The state and irregularities of the epoxy floor, the need to heat the floor, the insulation resistance to heavy weights and the protection of you floor against humidity and degradation caused by fungus and dampness. However, epoxy is much better than concrete so you won't have much trouble in terms of impermeability, etc.

However, the absence of plastic deformation does not mean that composites are brittle materials like monolithic ceramics. The heterogeneous nature of composites result in complex failure mechanisms which impart toughness. Fiber-reinforced materials have been found to produce durable, reliable structural components in countless applications. The unique characteristic of composite materials, especially anisotropy, require the use of special design

Presently elastic is found In blends, that are utilized in development comes and improvements of roadways. Elastic is by and large reused from late disposed of tires, which might even be reused. The tires are made into new stock, regardless of whether it 's inside of The kind of bigger rolls or adaptable elastic segments. As an asset, reused elastic might be a glorious there are more than 250 million tires that are tossed yearly (Rubber band versatility). Actually, a few people have made whole homes out of reused elastic the essential gum flexible that was suitable for tires was made of gum versatile that was proper to be made into tires, was made of a blend of vinylbenzene and hydrocarbon, manufactured measured at I.G. Farben. The Union of Soviet Socialist Republics, alluded to as its vinylbenzene hydrocarbon elastic. the most kind of elastic made these days is presently counterfeit. Truth be told, {southeast asia|Southeast Asia|geographical ara|geographic area|geographical region|geographic region} nations are at present the more-predominant makers of normal elastic as an aftereffect of the ascent measures of gum flexible. There are numerous different sorts of gum flexible, each marginally totally distinctive qualities like silicone, neoprene, nitrile, and EPDM elastic. Elastic is framed by warming a blend of elastic, sulfur, and distinctive chemicals into strips, that are expelled into tubes and cured into groups. Elastic groups are made of common elastic/latex or gum

Cost is another factor; polymer fibers have a lower cost per optical area unit than glass, in part due to the easier manufacturing process. High quality PMMA systems rely on a fusion process to construct the common end, hence dispensing with the use of epoxy potting compounds. In all instances where the use of many fibers or light points is prescribed polymer systems are a much better option. Another point to bear in mind is the weight factor: glass fibers are heavier than polymer, a fact that may be critical in some applications, such as automotive and aircraft