Essential Organic Chemistry (3rd Edition)
3rd Edition
ISBN: 9780321937711
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Chapter 15.8, Problem 20P
Explain why, when a small amount of glycerol is added to the reaction mixture of toluene- 2,6–diisocyanate and ethylene glycol during the synthesis of polyurethane foam, a much stiffer foam is obtained.
glycerol
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Chapter 15 Solutions
Essential Organic Chemistry (3rd Edition)
Ch. 15.2 - Prob. 1PCh. 15.2 - Prob. 2PCh. 15.2 - Prob. 3PCh. 15.2 - Prob. 4PCh. 15.2 - List the following groups of monomers in order...Ch. 15.2 - List the following groups of monomers in order...Ch. 15.2 - Prob. 7PCh. 15.2 - Why does methyl methacrylate not undergo cationic...Ch. 15.2 - Which monomer and which type of initiator would...Ch. 15.2 - Prob. 10P
Ch. 15.2 - Prob. 11PCh. 15.5 - Draw a short segment of gutta-percha.Ch. 15.5 - Prob. 13PCh. 15.6 - Prob. 14PCh. 15.8 - Prob. 15PCh. 15.8 - Prob. 16PCh. 15.8 - Prob. 17PCh. 15.8 - a. Propose a mechanism for the formation of the...Ch. 15.8 - Propose a mechanism for the formation of Melmac.Ch. 15.8 - Explain why, when a small amount of glycerol is...Ch. 15.10 - Prob. 21PCh. 15 - Draw short segments of the polymers obtained from...Ch. 15 - Prob. 23PCh. 15 - Draw the structure of the monomer or monomers used...Ch. 15 - Draw short segments of the polymers obtained from...Ch. 15 - Prob. 26PCh. 15 - Prob. 27PCh. 15 - Prob. 28PCh. 15 - A particularly strong and rigid polyester used for...Ch. 15 - Prob. 30PCh. 15 - Prob. 31PCh. 15 - Prob. 32PCh. 15 - Prob. 33PCh. 15 - Prob. 34PCh. 15 - Prob. 35PCh. 15 - Delrin (polyoxymethylene) is a tough...
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- Restate the paragraph. The main objective of the laboratory activity was to make aspirin also known as acetylsalicylic acid in its scientific name. It was successfully done as aspirin was synthesized using the combination of salicylic acid and acetic anhydride. In this reaction, salicylic acid's hydroxyl group on the benzene ring interacted with acetic anhydride to generate an ester functional group. This is an esterification reaction that produces acetylsalicylic acid. Sulfuric acid was utilized as a catalyst to start the esterification reaction. Some unreacted acetic anhydride and salicylic acid, as well as sulfuric acid, aspirin, and acetic acid, remained in the solution after the reaction was completed. The process of crystallization was used to obtain pure crystals of a substance from an impure mixture. Upon completion of the lab, analysis, and calculations, , it is evident that the synthesis of aspirin is possible using these methods but that the yield will be relatively lowarrow_forwardExplain why the addition of a small amount of glycerol to the polymerization mixture gives a stiffer urethane foam.arrow_forwardThink about what kind of compound can be obtained when D2O is mixed in ethyl benzoate.arrow_forward
- What is the critical extent of reaction (pc) based on Carother's approach to gelation for the synthesis of a polyamide using equimolar amounts of diethylene triamine and the acid chloride of trimesic acid (see structures below; assume only the primary amines react). Some helpful equations: Carothers Equation: p. = 2/fav, where fav = (ENfi) /ENi CI H2N `NH2arrow_forwardDraw the structural formula(s) for the organic product(s) formed when the following compound is heated at reflux in an excess of concentrated HI.arrow_forward4 Why must the mixture of (Ethanol, Ethanoic acid and sulphuric acid) not be boiled during esterification process? 5- Write down the type of 2-methyl-2-propanol?arrow_forward
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