Polyester resin Essays

The two polyesters produced in the first part of this experiment are a linear structured polyester with thermoplastic properties, and a cross-linked polyester with thermosetting properties. The linear polyester was produced from the reaction of phthalic anhydride with ethylene glycol. Due to the fact that both of these components have only two functional groups, the polymer chain is linear. As shown in Picture 1 above, the product formed from the reaction is a solid and resulted in a dark color change

While performing the slime lab, we were trying to find the effect of borax on glue and water. We mixed glue and water together and added small amounts of borax water to it. We wanted to find the difference in stretchiness with different amounts of borax. After adding the borax, we measured how far the slime could stretch. We hypothesized that the slime would stretch farther when more borax was added. Slime was developed in the beginning of the twentieth century during the time while synthetic

with their methods they can reduce the byproducts that are harmful to the environment by a large scale. Considering Nike’s main impact is on the environment one of the method Nike use is recycling plastic bottles and turning them into polyester and using the polyester to make clothing and sportswear, with 8 plastic bottles they can produce one shirt this helps the environment by reducing the garbage and

Argumentative Essay: Is Tap Water Better than Bottled Water? Bottled water ranks high among the fastest growing product in the beverage market/industry around the world. In other words, the world’s consumption of the bottled water is on the increase. Many consumers of bottled water see it as a perfect replacement of taped water. Despite many people opting for bottled water, the consumption of tap water remains high. As Doria (2006) notes, the type of water that a person consumes mainly depends on

Chapter 1: Introduction 1.1 Introduction Pet bottles are quite useful objectives now a day for the palatable and non-palatable food items. These bottles are made up of a material called, polyethylene terephthalate or PET. These bottles are transparent and quite useful for storing food and liquor items for daily use and heavy industry use (Baroneet al. 2008). The research paper is going to take up the issue of the PET bottle manufacturing and taking it online by taking the company, Himalayan Group

an alicyclic glycol [52], the cycloaliphatic structure of 1,4 cyclohexanedimethanol imparts particular conformational transitions and molecular structure to polyesters [53]. Ni et al [54] stated that polyesters containing cyclic moieties in their backbone are of transitional mechanical properties in comparison to aromatic and linear polyesters. 1,4 cyclohexanedimethanol could provide an excellent compromise between hardness and flexibility. The two primary hydroxyl functionalities provide excellent

1.1. Polyesters Polyesters are the polymers that contain ester functional group in their main chain. The polyesters can be classified according to the composition of their main chain as aliphatic and semi-aromatic in addition to aromatic polyesters. Also can be thermoplastic or perhaps thermoses. All common polyesters are thermoplastics (Rosato, L. et al. 2004).According to the composition of their main chain; polyesters can be classified as shown in table 1. 1.1. 1. Aliphatic polyesters Aliphatic

1.3 Organosilane [66] Monomeric silicon chemicals are known as silanes and any chemical that contains at least one carbon-silicon bond is known as an organosilane. Generally, organosilanes contain three key elements beside silicon; X represents for an organic moiety that is non-hydrolysable which can be either reactive or non-reactive depending on its type. OR\ is a hydrolysable group such as alkoxy or an acetoxy is known to be unstable when present with hydroxyl groups. Finally, R is a space

INTRODUCTION Figure 1: Molecular Structure of PET PET (or PETE) is also known as polyethylene terephthalate or (C10H8O4)n. Its natural state is a colorless, semi-crystalline resin when combined with other materials like glass fiber or carbon nanotubes, it increases the material’s strength. Polyethylene terephthalate melts at 260°C and Amorphous density (at 25oC) is 1.33 g/cm3. PET can be produced by 2 different reactions as a product of polymerization. The first reaction is between ethylene glycol

Roy Cohn- Born on February 20th, 1927, in New York City and passed away on August 2nd, 1986, in the Bronx. Cohn was on Senator Joseph McCarthy’s side during his trials on communists in the movie production industry and government. Today the United States, alone among the major democracies, has no Communists, socialists, anarchists, left-wing political groups except in microscopic numbers. All because of Roy Cohn. His father, Albert Cohn, was a judge and well known in the Democratic Party. Juan Peron-

Safety helmets- Keeping people protected Safety is the first thing that a job must ensure its employees. Till date, the safety of the employee stands as the foremost concern of any employer since this speaks a lot about the standards of the company. These safety helmets or the hard hats are the ones that are used by the people who are involved in the construction or the other civic works. The chances of getting injured are pretty high in the field and thus this calls the immediate need for the use

These advanced composites, also called laminates, are more expensive and have specific properties to achieve a specific objective in a structure. Aircraft composite structures are made using precisely positioned plies of carbon fibre and polyester resin composition. Large components of commercial airliners, such as the Boeing 787 Dreamliner, are an example of application of composites in aircraft structures. Refer to Figure 2 for the application of composites in the Boeing 787 Dreamliner. As

DNA and proteins that are fundamental to biological structure and function. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers. There are many different types of plastics such as: • Polyester (PES) – Fibers, textiles. • Polyethylene terephthalate (PET) – Carbonated drinks bottles, peanut butter jars, plastic film, microwavable packaging. • Polyethylene (PE) – Wide range of inexpensive uses including supermarket bags, plastic

What Is It? Ethylene glycol is an organic compound, specifically an alcohol that belongs to the –OH functional group; it is composed of carbon, hydrogen, and oxygen with the chemical formula of C2H6O2. It is a colourless, clear liquid with a syrupy consistency and sweet taste; it has no odor however. Ethylene glycol has a melting point of −12.9 °C (8.8 °F; 260.2 K) and boiling point of 197.3 °C (387.1 °F; 470.4 K). Ethylene glycol is soluble in most organic solvents. It was French chemist, Charles-Adolphe

food, cosmetic and chemical industries [2]. Glycerol also can be employed as the raw material to produce variety types of chemical products such as hydrogen, ethanol, propanol, acrolein, 1,3- propanediol, lactic acid, succnic acid, citric acid, polyesters

What is Hydroelectric Power (H.E.P.)? Hydropower is the power/electricity, which is generated form energy of water flow. This source of power is considered to be renewable energy as it is constantly refilled due to the water cycle. In addition to the water cycle, hydropower is dependent upon stored gravitational energy. A rock on top of a hill contains potential energy because of its position. If a force pushes the rock, it rolls down the hill because of the force of gravity. Potential energy