Organic Chemistry (Looseleaf)
4th Edition
ISBN: 9780077640194
Author: SMITH
Publisher: MCG
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Textbook Question
Chapter 31, Problem 31.58P
Compound A is a novel poly (ester amide)
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Compound A is a novel poly(ester amide) copolymer that can be used as a bioabsorbable coating for the controlled release of drugs. A is a copolymer of four monomers, two of which are amino acids or amino acid derivatives. The body’s enzymes recognize the naturally occurring amino acids in the polymer backbone, allowing for controlled enzymatic breakdown of the polymer and steady release of an encapsulated drug. Identify the four monomers used to synthesize A; then use Figure 29.2 to name the two amino acids.Figure 29.2: The 20 naturally occurring amino acids
Poly(vinyl alcohol), a hydrophilic polymer used in aqueous adhesives, is made by polymerizing vinyl acetate and then hydrolyzing the ester linkages. Give the structures of poly(vinyl acetate) and poly(vinyl alcohol)
Give a schematic drawing of a linear, branched and cross-linked polymer, as well as an isotactic, atactic and syndiotactic polymer.
Chapter 31 Solutions
Organic Chemistry (Looseleaf)
Ch. 31 - Prob. 31.1PCh. 31 - Prob. 31.2PCh. 31 - Prob. 31.3PCh. 31 - Draw the mechanism for the radical polymerization...Ch. 31 - Prob. 31.5PCh. 31 - Prob. 31.6PCh. 31 - Prob. 31.7PCh. 31 - Prob. 31.8PCh. 31 - Prob. 31.9PCh. 31 - Prob. 31.10P
Ch. 31 - Prob. 31.11PCh. 31 - Problem 30.12
What polymer is formed by anionic...Ch. 31 - Prob. 31.13PCh. 31 - Prob. 31.14PCh. 31 - Problem 30.15
What polyamide is formed from each...Ch. 31 - Prob. 31.16PCh. 31 - Prob. 31.17PCh. 31 - Prob. 31.18PCh. 31 - Prob. 31.19PCh. 31 - Prob. 31.20PCh. 31 - Prob. 31.21PCh. 31 - Prob. 31.22PCh. 31 - Prob. 31.23PCh. 31 - Prob. 31.24PCh. 31 - Prob. 31.25PCh. 31 - Prob. 31.26PCh. 31 - 30.26 Draw the structure of the polymer formed by...Ch. 31 - Prob. 31.28PCh. 31 - Prob. 31.29PCh. 31 - Prob. 31.30PCh. 31 - Prob. 31.31PCh. 31 - Prob. 31.32PCh. 31 - Prob. 31.33PCh. 31 - Prob. 31.34PCh. 31 - Prob. 31.35PCh. 31 - Prob. 31.36PCh. 31 - Prob. 31.37PCh. 31 - Prob. 31.38PCh. 31 - Prob. 31.39PCh. 31 - 30.39 Draw a stepwise mechanism for the...Ch. 31 - 30.40 Cationic polymerization of 3-phenylpropene ...Ch. 31 - Prob. 31.42PCh. 31 - Prob. 31.43PCh. 31 - 30.43 Although styrene undergoes both cationic and...Ch. 31 - 30.44 Rank the following compounds in order of...Ch. 31 - Prob. 31.46PCh. 31 - Prob. 31.47PCh. 31 - 30.47 Draw a stepwise mechanism for the following...Ch. 31 - 30.48 Draw a stepwise mechanism for the reaction...Ch. 31 - Prob. 31.50PCh. 31 - Prob. 31.51PCh. 31 - Prob. 31.52PCh. 31 - 30.52 (a) Explain why poly (vinyl alcohol) cannot...Ch. 31 - Prob. 31.54PCh. 31 - 30.53 Devise a synthesis of terephthalic acid and...Ch. 31 - Prob. 31.56PCh. 31 - Prob. 31.57PCh. 31 - 30.56 Compound A is a novel poly (ester amide)...Ch. 31 - Researchers at Rutgers University have developed...Ch. 31 - 30.58 Melmac, a thermosetting polymer formed from...Ch. 31 - 30.59 Although chain branching in radical...Ch. 31 - Prob. 31.62P
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- In addition to glycolic and lactic acids (Section 30.6B), dissolving sutures can also be prepared from each of the following lactone monomers. Draw the structure of the polymer formed from each monomer.arrow_forwardDraw (by hand) the monomers used to synthesize poly(ethyl cyanoacrylate) and poly(octyl cyanoacrylate), and chemical structure of the repeat units of each when polymerized.arrow_forwardThe polyamide structure shown below provides lightweight, heat and flame resistant performance for many extreme applications like fife fighting and law enforcement. Write a polymerization equation for this polyamide including the structures of monomers that can be used to synthesize itarrow_forward
- When polyethylene is made by free radical polymerization, the resulting polymer has a significant amount of branching, resulting in low-density polyethylene (see Section 26.9a). When styrene undergoes free radical polymerization, on the other hand, very little branching occurs. Explain this phenomenon.arrow_forward1. What requirement should be provided to achieve high yield and high molecular weight of polymer by condensation reaction? 2. What is interfacial polymerization 3. Describe biopolymer and synthetic polymer. Give examples to support your answer 4. Briefly discuss the classification of polymers. 5. Why polymers are widely used in our daily life?arrow_forwardNovolac is the linear polymer which on heating with formaldehyde forms cross-linked bakelite. Write the structures of monomers and the polymer novolac.arrow_forward
- Explain with more details, how you can prepare poly(propylene oxide) by using Anionic and Cationic polymerizations?arrow_forwardGive handwritten answer- Write three characteristic features for Zieglar Natta polymerization.arrow_forwardOne common type of cation exchange resin is prepared by polymerization of a mixture containing styrene and 1,4-divinylbenzene . The polymer is then treated with concentrated sulfuric acid to sulfonate a majority of the aromatic rings in the polymer. Q.) Explain how this sulfonated polymer can act as a cation exchange resinarrow_forward
- The 2000 Nobel Prize in Chemistry was awarded for work on polyacetylenes. Acetylene can be polymerized using a Ziegler–Natta catalyst. The cis or trans stereochemistry of the products can be controlled by careful selection and preparation of the catalyst. The resulting polyacetylene is an electrical semiconductor with a metallic appearance. cis-Polyacetylene has a copper color, and trans-polyacetylene is silver. It is possible to prepare polyacetylene films whose electrical conductivity is anisotropic. That is, the conductivity is higher in some directions than in others. Explain how this unusual behavior is possible.arrow_forwardPoly(vinyl alcohol), a hydrophilic polymer used in aqueous adhesives, is made by polymerizing vinyl acetate and then hydrolyzing the ester linkages. Vinyl acetate is an ester. Is poly(vinyl acetate) therefore a polyester? Explain.arrow_forward
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