Polymer

39. The Viscosity of Liquids After studying the present lecture, you will be able to Define viscosity and viscosity coefficient Outline the method to measure viscosity using Ostwald viscometer Determine the average molecular weight of a polymer Determine the surface concentration of 1-butanol in aqueous solution Measure the distribution coefficient of a solute betweenn two solvents 39.1 Introduction Viscosity, one of the transport properties, arises because of intermolecular attractive and

and we were curious to find out more about how the substance affects the speed at which the capsules grow. The Magic Growing Capsules are made of a large polymer, which is a substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together. When the capsule is submerged in water, the polymer expands, causing the capsule to turn into a sponge animal. To better our understanding before we began experimentation, we researched and defined certain

of large molecules called polymers which are made up of shorter compounds called monomers. To make various types of plastics, chemists use different types of monomers in different arrangements to change the chemical and physical properties. 2. State the two main types of plastics and describe their physical and chemical properties. The two main

1 CHAPTER. 1 COMPOSITES 1.1 Introduction A "composite" is when two or more different materials are combined together to create a material which is superior and unique and holding different properties than earlier. Light weight high strength materials are essential in fabrication of aerospace structures like airframes, rocket motor casings, nozzles and wings. The composites are the materials formed by embedding fibers in the plastic that add characteristics like high resistance to fatigue, anticorrosive

to test for the presence of protein, starch, glycogen, and reducing sugars in 12 different samples using various assessments in order to ultimately identify the unknown sample #26 as one of the four macromolecule groups. Macromolecules consist of polymers formed by the linkage of small subunits called monomers (Alberts et al., 2014). The four major groups are carbohydrates, lipids, proteins, and nucleic acids (Alberts et al., 2014). The 12 samples that were tested on in this laboratory experiment

procedures and test conditions based on practices ASTM G151, ASTM G155, ASTM D2565 and ASTM D2244. ASTM F1515 also covers the preparation of test specimens, the test conditions and the evaluation of test results. Use and factors to be considered: Polymers can have their mechanical, electrical and optical properties significantly altered when exposed to light even behind window glass. This method is intended to quantify the amount of color change in flooring products

found that when the ancient tea, the smell is very little. This research is interested in the development of new flavors. It is in the form of an edible oil storage film. The essential oil is stored as a micro-particle sized. Inserted in the film polymer structure by means of casting. The purpose is to use

Epoxy or polyepoxide is a cross linking thermosetting polymer that cures (polymerizes and cross-links) when mixed with a "hardener" or curing agent. Most common epoxy resins are formed by the polymerization between epichlorohydrin and bisphenol-A. Dr. S.O. Greenlee of United States and Dr. Pierre Castan of Switzerland were in the year 1936, first jointly synthesized bisphenol-A based epoxy resins. Epoxy resin is most widely used as a matrix for advanced structural composites due to their superior

Chemistry Council, A. (2005, January 01). Plastics. Retrieved April 11, 2017, from https://plastics.americanchemistry.com/How-Plastics-Are-Made/ a) Plastics are also called polymers, are produced by natural products like oil, natural gas or coal. b) Raw materials form monomers that are used to form polymers or plastics. c) Other raw materials isolated from petroleum are benzene and xylenes, made to make polystyrene, nylons, and polyesters. d) Polyethylene’s can be made to be stiff or flexible

image analysis program (Drop Shape Analysis (Version 1.8)). The Krüss Easy Drop apparatus was used to measure the contact angles that resulted when a 10μL drop of either H2O, glycerol, or ethylene glycol was placed on the surface of a sample disk 6. Polymer samples were labeled and radiograph images were taken using a infinity XMA HF-30AP, set to Manual technique mode with an exposure time of 0.016 seconds and MAS@6.1 and 70KV. Images were taken of each sample individually and s-values, numeric value