Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Chapter 31.SE, Problem 34AP
Interpretation Introduction
Interpretation:
To propose the structure of the final polymerized product of the urea and formaldehyde.
Concept introduction:
Urea-formaldehyde
Properties like high heat resistant, less water absorption, mould shrinking makes it a better adhesive in nature.
This types of reaction occurs according to the condensation
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The reaction of urea [(NH2)2C=O] and formaldehyde (CH2=O) forms a highly cross-linked polymer used in foams. Suggest a structure for this polymer.
Bakelite, a durable plastic used for the casing of early radios and TVs, was the first of the thermosetting polymers. It is a highly cross-linked polymer formed from the acid-catalyzed polymerization of phenol and formaldehyde. Because it is much darker than Melmac, Bakelite’s range of colors is limited. Propose a structure for Bakelite.
The reaction of urea [(NH2)2C = O] and formaldehyde (CH2 = O) forms a highly cross-linked polymer used in foams. Suggest a structure for this polymer. [Hint: Examine the structures of Bakelite (Figure 30.7) and Melmac (Problem 30.58).]Figure 30.7: The synthesis of Bakelite from phenol and formaldehyde
Chapter 31 Solutions
Organic Chemistry
Ch. 31.1 - Order the following monomers with respect to their...Ch. 31.1 - Order the following monomers with respect to their...Ch. 31.1 - Prob. 3PCh. 31.2 - Prob. 4PCh. 31.2 - Prob. 5PCh. 31.3 - Prob. 6PCh. 31.3 - Prob. 7PCh. 31.4 - Prob. 8PCh. 31.4 - Show the mechanism of the nucleophilic addition...Ch. 31.5 - Prob. 10P
Ch. 31.6 - Prob. 11PCh. 31.6 - Prob. 12PCh. 31.SE - Prob. 13VCCh. 31.SE - Prob. 14VCCh. 31.SE - Prob. 15MPCh. 31.SE - The polyurethane foam used for home insulation...Ch. 31.SE - Prob. 17MPCh. 31.SE - Prob. 18MPCh. 31.SE - Prob. 19MPCh. 31.SE - Identify the monomer units from which each of the...Ch. 31.SE - Prob. 21APCh. 31.SE - Draw the structure of Kodel, a polyester prepared...Ch. 31.SE - Show the structure of the polymer that results...Ch. 31.SE - Prob. 24APCh. 31.SE - Prob. 25APCh. 31.SE - 1, 3-Cyclopentadiene undergoes thermal...Ch. 31.SE - Prob. 27APCh. 31.SE - Prob. 28APCh. 31.SE - Prob. 29APCh. 31.SE - Prob. 30APCh. 31.SE - Prob. 31APCh. 31.SE - Prob. 32APCh. 31.SE - Prob. 33APCh. 31.SE - Prob. 34APCh. 31.SE - Prob. 35AP
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