7. Modelling Polyethylene As mentioned previously‚ PE is one of the most important polymers in the world. ADMET has been used to systematically model commercially relevant polymers‚ specifically PE and copolymers of ethylene and another monomer. ADMET is capable of producing PE with specific sequences of monomer units‚ as well as random copolymers via copolymerization with 1‚9-decadiene. The ability to precisely synthesize these polymers has opened the door to exploring the molecular origins of
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Diels-Alder Synthesis of Exo-Norbornene-cis-5‚6-Dicarboxylic Anhydride for Organic Chemistry Laboratory Instruction Kyle Myers and Dr. James Roark University of Nebraska at Kearney‚ Department of Chemistry‚ Kearney‚ NE 68849 Abstract A technique for the Diels-Alder synthesis of endo-norbornene-cis-5‚6dicarboxylic anhydride and its stereoisomer‚ exo-norbornene-cis-5‚6-dicarboxylic anhydride‚ is explained. To prove that each stereoisomer was made in the experiment and to distinguish between the
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Supplementary Textual Material in Chemistry for Class XI & Class XII 1 Acknowledgements CBSE ADVISORS Shri Vineet Joshi‚ I.A.S.‚ Chairman‚ CBSE Shri Shashi Bhushan‚ Director (Acad.)‚ CBSE CONVENOR & EDITOR Prof. A.K.Bakhshi Department of Chemistry‚ University of Delhi. DEVELOPMENT TEAM Prof. A.K.Bakhshi Department of Chemistry‚ University of Delhi. Dr. Anju Srivastava Hindu College‚ University of Delhi. Dr. Vimal Rarh S.G.T.B. Khalsa College‚ University
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COMPARATIVE INVESTIGATION OF ORGANIC COMPOUNDS Abstract Organic compunds were examined to a comparative investigation to differentiate the properties of each sample. The physical state at room temperature‚ odor and color of the sample were noted by simple observation. In terms of solubility in H2O‚ 5% NaOH solution and 5% HCl solution‚ the samples were classified as to miscible‚ slightly immiscible or immiscible for liquid; and very soluble‚ soluble‚ partially soluble or insolubse for solid. The
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Polysaccharide Biotechnology essay “It has been claimed that polysaccharides are relatively simple substances without much variety in terms of their structure and their application in an industrial or medical contact.” Write an essay giving a reasoned treatise why you do or do not agree with this statement. In your answer‚ compare and contrast the structure‚ costs of production‚ possibility for chemical/enzymatic modification and the industrial applications of two structural polysaccharides (such
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from: http://www.stenutz.eu/chem/solv6.php?name=methylene+chloride Webmaster Webmaster. (2013). 1 - Propanol. Retrieved from: http://www.stenutz.eu/chem/solv6.php?name=1-propanol Webmaster Webmaster. (2013). Ethyl Acetate. Retrieved from: http://www.stenutz.eu/chem/solv6.php?name=ethyl+acetate Webmaster Webmaster. (2013). Hexane. Retrieved from: http://www.stenutz.eu/chem/solv6.php?name=hexane Webmaster Webmaster. (2013). 2-Butanol. Retrieved from: http://www.stenutz.eu/chem/solv6.php?name=2-butanol
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Edward Dickson CHE101 DS-01 Experiment Date 7/21/2013 Report Submitted 7/21/2013 Title: Experiment #8: Ionic Reactions Purpose: In this lab we will work with aqueous solutions of ionic substances and determine if they are soluble. If the solution appears milky than it is known as a precipitate reaction‚ meaning it is soluble‚ and that the ions separated and became surrounded by water. Precipitates in this experiment are electrically uncharged. To identify which compounds are
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the complication that macromolecules often have variations in chain length or molar mass even within a given sample. The idealized formula of polyvinyl alcohol is -(C2H2—CHOH)-n‚ which assumes consistent orientation in the addition of the vinyl acetate monomers1.
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low yields of the desired product. Gas chromatographic analysis of mono and disaccharides requires conversion of sugars into their volatile derivatives. Conversion of sugars into alditol acetates and trimethylsilyl (TMS) ethers have been the most widely used methods for GC analysis of sugars. "Alditol acetate" method involves reduction of sugars with sodium borohydride following conversion of polyols to polyacetate esters. TMS ethers of sugars can be prepared from a number of commercially available
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catalyst. The percent yield of the product was sub-par. It was found to be 54.4%‚ which may have been due to the formation of other byproducts during the experiment. For example‚ the benzoin and copper(II) acetate mixed with ammonium nitrate and acetic acid could have caused the copper(II) acetate to not fully react with the benzoin. This side-reaction led to less benzoin intermediate which in turn led to a less yield of benzil product. Additionally‚ the melting points found were similar to that of
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