A polymer is a substance formed by many molecules that are all strung together to form a long chain‚ and has been around since the beginning of time (Polymer). Examples of different polymers being used in everyday life are things like rubber and starch‚ which are both frequently used in the world (Brewer). Polymers also make up what are known as “polymer creatures‚” which are the things that are used in experiments about polymers. The polymer creatures‚ made out of two different polymers‚ are both
Premium Water Orders of magnitude Liquid
CONDUCTING POLYMERS By Colin Pratt INTRODUCTION Until about 30 years ago all carbon based polymers were rigidly regarded as insulators. The idea that plastics could be made to conduct electricity would have been considered to be absurd. Indeed‚ plastics have been extensively used by the electronics industry because of this very property. They were utilized as inactive packaging and insulating material. This very narrow perspective is rapidly changing as a new class of polymer known as intrinsically
Premium Polymer Plastic
1. What does it mean when a polymer is crosslinked? Crosslinked is one manner in which monomers link together. In this method‚ separate polymer chains are connected via bonds between the individual polymer chains. 2. We discussed how polymer linking and structure contribute to its properties. How would you expect the density‚ elasticity‚ and rigidity of a polymer that is branched to compare to one that is linear? I would expect the density of the linear polymer to be much higher than the density
Premium Polymer Molecule Atom
Polymers in Dentistry A polymer is a very long molecule that is made by linking together many smaller molecules called monomers. Some polymers contain only one type of monomer and others can be made from a combination of two or more different monomers. Polymers can be synthetic (produced by humans) or natural. Polymers that can be heated and molded into specific shapes and forms are commonly known as plastics. All plastics are synthetic polymers. Adhesives‚ chewing gum‚ and polystyrene are also
Premium Polymer Monomer
Effect of Temperature on Polymers: Solids on heating eventually melt to form a liquid. With polymers it is not so simple rubber on cooling (in liquid nitrogen) becomes brittle or glassy. Many polymers have a mixture of ordered (crystalline) regions and random (amorphous) regions. In the glassy state‚ the tangled chains in the amorphous region are frozen so movement of chains is not possible the polymer is brittle. If the glassy material is heated‚ the chains reach a temperature at which they
Premium Glass Polymer Solid
Cross Linking effects on Polymers Purpose To observe the properties of the polymers with different amount of borax to see the effects of cross linking. Question How does the amount of a cross linking substances affect physical properties of a polymer Experimental Design A polymer was made with precise measuring of all the reactants especially different measurements of Borax solution as it was the key to cross linking. Physical properties of all the polymers were observed and the role of
Premium Polymer Measurement Liquid
performed by Ryan Nelson‚ Peter Glascor‚ Eric Flowr was to determine the identity of the unknown polymer by comparing its properties to properties of other known polymers. Most likely‚ the part is one of the five following polymers: polyethylene‚ polypropylene‚ polystyrene‚ polycarbonate‚ poly(vinyl chloride). These are all extremely common‚ and have widespread applications in industry. Each of these polymers exhibits properties which allow it to be of unique technological importance. Theoretical
Premium Plastic Polymer Melting point
Polymer Chemistry Classification of Polymers – Notes prepared by The most common way of classifying polymers is to separate them into three groups - thermoplastics‚ thermosets‚ and elastomers5. The thermoplastics can be divided into two types - those that are crystalline and those that are amorphous. You may click on the words in the diagram below to learn more about these classifications. Thermoplastics Molecules in a thermoplastic are held together by relatively weak intermolecular
Premium Polymer
POLYMER DATA HANDBOOK *Home *Browse/Search Contents *Browse by Polymer Class *Browse the Index *Online help Copyright © 1999 by Oxford University Press‚ Inc. EDITED BY JAMES E. MARK‚ UNIVERSITY OF CINCINNATI PUBLISHED BY OXFORD UNIVERSITY PRESS The online version of the Polymer Data Handbook includes key data on over two hundred polymers. Please note that entries are presented as PDF files and can only be read using Adobe Acrobat Reader Version 3. If you do not have the freeware reader‚
Premium Polymer
is the following : { NH – (CH2)5 – CO }n and M = 113 g/mol PD = 60‚000 / 113 = 531 The repeat unit of Nylon 6‚6 ( polyhexamethyleneadipate ) is : { OC(O) – (CH2)4 – CO – NH – (CH2)6 – NH } and M = 226 g/mol PD = 60‚000 / 214 = 265 -a) The polymer formed by the polycondensation of 2 moles of terephtalic acid and 2 moles ethyleneglycol is poly(ethyleneterephtalate) with the following repeat unit : { OC – C6H4 – C(O)O – CH2 – CH2 – O }n and M = 192/2 = 96
Premium Polymer