Polymer chemistry Essays

A polymer is a class of nature or synthetic substance composed of very large molecules called macromolecules. Polymers make up materials in organisms including proteins, cellulose, and nucleic acids. (Polymer. (2014). Encyclopedia Britannica.) Polymer chemistry has impacted our society today greatly by manipulating matter to fulfill the needs of people in everyday life. Chemists have synthesized materials to possess certain properties in order to benefit mankind. In this lab, the materials used are

Introduction: The topic for the experiment was using polymer chemistry to develop the best suitable material for a bouncing ball. Within the experiment, three chemicals were given to test for the best material. The three chemicals were chemicals sodium borate (4% m/v), polyvinyl acetate, and polyvinyl alcohol (4% m/v). Polyvinyl acetate and polyvinyl alcohol are both polymers. Polymers are many molecules bonded together using the same linkage, which then forms a chain like structure1. These chain

Loubani1 Reem Loubani Mrs. Dina Daher Chemistry Sunday December 25th, 2016 Plastic Synthesis Polymers are large molecules composed of smaller molecules called monomers. Polymers are found almost everywhere around you. Some of them are naturally occurring, such as proteins, starch, silk, and wool, while others, such as nylon, Teflon, and plastics, are synthesized in labs to yield important products. Plastic is a material widely known by people; it is used in an enormous range of products

WINDSHIELD REPAIR: WHAT IS IT? Your vehicle's windshield is composed of three layers: two pieces of glass separated by a thin layer of "PVB" (polyvinyl butyrate). PVB is the plastic film that essentially holds it all together. Depending on the density of the outer-layer and the force of a rock impact, the glass can flex and break. Unless the windshield is completely shattered, most often the damage is in the form of a rock chip. These are generally in the shape of a star, bullseye, or tiny crack

atoms, hexamethylenediamne and adipic acid (figure 1.), which give nylon 66 its name. This specific type of nylon was invented by Wallace Carothers at DuPont’s research facility on the 28th of February, 1935. Properties of this polymer that make it the best polymer suited for fishing line includes: high elasticity, high tensile strength, cheap to produce and its resistance to abrasions and chemicals in the water. Nylon 6,6 is one of the newer materials used for making fishing lines however, many

High-grade jacket materials such as polyurethane (PUR) should be considered. PUR is resistant to harsh conditions such as oils, fire, abrasions and chemicals. Lower grade jacket materials, such as PVC, while less expensive cannot handle exposure to oils and chemicals and might degrade. PVC also becomes brittle and cracks at low temperatures. Material selection can be dependent on the material’s electrical, mechanical and environmental capabilities and the ease with which they can be attached to

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

the underlying structures through the cells. Therefore, the cells are interconnected. This type of structure is called as bicontinuous nanoporous structure: two continuous phases are the polymer matrix and air pores. Homogeneous PSU-CO2 mixture separates into two continuous phases: PSU-rich phase (i.e., polymer matrix) and CO2-rich phase (i.e., voids). Although both cellular structures are bicontinuous nanoporous, and cell size and relative density are also similar, they seem to have different morphologies

JR Rubber Industries is an ISO 9001-2008 company, specialized in the production of high-quality Rubber molds for designer tiles, wall tiles, paving blocks and other non-standard, customized size tiles as per client requirements. For more than 25 years, we have been at the forefront of development and distribution of quality rubber molds and built our own reputation on a commitment to providing quality products and service. Our pioneer service continues to provide the refined products and services

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 polymers were being seriously studied. Slime is not the only polymeric toy that is manufactured and sold. There are many other toys similar to it being produced. While it is amusing for both children and adults, slime also helps develop dexterity and creativity

brown-black polymer of dihydroxyindole carboxylic acids, and their reduced forms. All melanin are derivatives of polyacetylene. There are three major types of melanin; Eumelanin (black or brown), Pheomelanin (yellow-red) and all melanins. The most common melanin is a Eumelanin which is also known as DOPAmelanin, it is a mixed copolymer of polyacetylene, polyaniline, and polypyrrole. Another common form of melanin is pheomelanin, a red-brown polymer of benzothiazine

First and foremost, the claim is hardship in war period. In the painting, a man is plowing soil with the help of two horses. The man probably is not a farmer as his cloth is neat, clean and still in a good condition which is not like other farmers who usually are dirty and messy. The man might be forced to be a farmer to earn a living to support his family after his property was taken away by the authority for military expenditure as there is quite a number of soldiers are hiding in between the ploughed

Have you ever wondered what living objects were made up off? How food is digested? No not by cells, but those catalysts that break down substances. They are called enzymes. Enzymes are biological molecules, proteins, which act as catalysts and help complicated reactions occur everywhere in life. Enzymes are very precise catalysts that usually work to complete one assignment. Example being; an enzyme that helps digest proteins will not be useful to break down carbohydrates. Also, you will not find

Glycidoxypropyltrimethoxysilane (GPTMS) and Bis (3-trimethoxysilyl-propyl) amine (Dynasylan 1124 ®) are provided by Evonik Industries, USA. Heloxy Modifier 65® (EEW=230) and epoxy resin (EPON 828 ®, EEW=188) are supplied with Momentive, USA. Isophorone diisocyanate (IPDI) is supplied by Bayer Material Science. Colloidal silica Ludox HSA is provided by Grace Davison. Brulin 815 GD is obtained from Brulin & company Inc. Mercaptanbenztriazol (MBT) (corrosion inhibitor) and all other chemicals and solvents

Polyester is an important component to consumers all around the globe. It is made from a fiber that can be manufactured into goods such as, clothes, furnishing, water bottles, balloons, hoses, and many more useful items. Most notably however, it has made a huge impact in the T-shirt industry. Where would the great disco days of the 70’s be without polyester clothing? It’s safe to say that polyester has become an important resource in everyday life, but how did such a commodity to the everyday consumer

INTRODUCTION New product innovation using polymer based materials to be introduced is polymer opal apparel. The polymer opal apparel is absolutely not typical clothes because it has its own uniqueness and attraction due to the materials used to produce this product. Polymer opal apparel using polymer based materials which are spandex fibres and polymer opal. Uniqueness and advantages of polymer opal apparel is that it has an appearance in which the colour is changing due to strain, pressure and movement

Metabolic engineered of biocatalyst: A solution for PLA based problems ABSTRACT Poly lactic acid(PLA) is a biodegradable polymer used in many biomedical as well as in packaging Applications. Conventionally, PLA is produced by two method which is direct condensation of lactic acid and ring opening polymerization. The polymer produced from these conventional methods produced polymer which have low molecular weight. Conventional methods of PLA production requires catalyst which makes it unfit for biomedical

Polyvinyl chloride is obtained by chain polymerization. Double bonds of vinyl chloride monomer get opened up. Since monomers possess a double bond between two of their carbon atoms in their structures, those get activated in the presence of tiny concentrations of starters. In this way, double bonds get open and monomers react rapidly so they associate with each other by forming macromolecules chains. Polyvinyl chloride polymerization is a highly exothermic reaction, where a high amount of heat is

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. The solid structure is form after cooling and the color change represented the presence of a reaction. As shown in Table 1, the linear polymer was not brittle and was not viscous after cooling. The cross-linked polyester with thermosetting properties was

Karen L. Wooley is a great example of an individual that uses chemistry everyday in her life. She is a very prosperous professor who is very well off, she lives in a mansion and owns a luxurious Maserati. Professor Wooley opened my eyes to a potential new path I could take due to the fact that she is very well off and successful. She delivered a very interesting lecture titled, ““Sophisticated Nanoscopic Macromolecules.” She began by introducing the role of chemists in the world, and how they