Organic Chemistry-Package(Custom)
4th Edition
ISBN: 9781259141089
Author: SMITH
Publisher: MCG
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Chapter 31, Problem 31.53P
(a) Explain why poly (vinyl alcohol) cannot be prepared by the radical 
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(a) Hard contact lenses, which first became popular in the 1960s, were made by polymerizing methyl methacrylate [CH2=C(CH3)CO2CH3] to form poly(methyl methacrylate) (PMMA). Draw the structure of PMMA. (b) More-comfortable softer contact lenses introduced in the 1970s were made by polymerizing hydroxyethyl methacrylate [CH2=C(CH3)CO2CH2CH2OH] to form poly(hydroxyethyl methacrylate) (poly-HEMA). Draw the structure of poly-HEMA. Because neither polymer allows oxygen from the air to pass through to the retina, newer contact lenses that are both comfortable and oxygen-permeable have now been developed.
(a) Hard contact lenses, which first became popular in the 1960s, were made by polymerizing methyl methacrylate
[CH; =C(CH,)CO,CH3] to form poly(methyl methacrylate) (PMMA). Draw the structure of PMMA. (b) More comfortable softer
contact lenses introduced in the 1970s were made by polymerizing hydroxyethyl methacrylate [CH2=C{CH)CO,CH,CH2OH] to
form poly(hydroxyethyl methacrylate) (poly-HEMA). Draw the structure of poly-HEMA. Since neither polymer allows oxygen from
the air to pass through to the retina, newer contact lenses that are both comfortable and oxygen-permeable have now been
developed.
(a) Draw the structure of polystyrene, which is formed by polymerizing the monomer styrene, C6H5CH=CH2.
Chapter 31 Solutions
Organic Chemistry-Package(Custom)
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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- (a) Describe the polymerization of a blend of maleic anhydride and 2-methyl-1,3- propanediol in the presence of an acid catalyst. Draw a chemical reaction scheme showing the intermediate and final products that are formed. Describe the reaction conditions that you would use to maximize the yield of polymer. (b) Draw the structure of the polymer, showing the repeat unit and end groups, that is obtained when the mole ratio of maleic anhydride to diol is 0.95 (c) What is the number average molecular weight of the polymer of Part (b) when the extent of reaction of maleic anhydride is (i) 90% and (ii) 100%. (d) Describe how the structure of the polymer is altered when it is further reacted with styrene in the presence of peroxide.arrow_forwardNeed help with part b,c,darrow_forward(b) Draw the structures of the polymers obtained from the followng monomers and name the polymerisation process in each case. H H H CH3 4 1 3 NH2 H2N 5arrow_forward
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- 1. Answer the following questions: (a) Why is free radical polymerization more commonly used today than ionic polymerization? (b) Almost all substituted ethylene monomers of commercial importance have the structure of CH2 = CHR or CH2 = CRR’ (where R or R' represent identical or different substituent groups). Why? (c) What are some methods for the production of conductive polymers? Give a few examples.arrow_forward1) (a) What is the difference between homopolymer and copolymer? (b) How can you classify the polymer depending on their skeletal structure?arrow_forward(1) Write a complete chemical equation showing reactants, products, and catalysts needed (if any) for the following reaction and (2) Draw and name the organic compound found in every reaction. (a) Complete hydrogenation of 2-Methylhexa-1,5-diene (b) Complete halogenation (Br2) of 3-Ethyl-2,2-dimethylhept-3-ene (c) Reaction of (4E)-2.4-Dimethylhexa-1,4-diene with a mole of water (d) Reaction of cis-3,3-Dimethyl-4-propylocta-1,5-diene with two mole of HBr (e) Reaction of trans-1-Bromo-3-chlorocyclopentane with potassium hydroxide (f) Formation of Gilman reagent using isopropyl bromide (g) Ozonolysis of 3,3-Dimethyloct-4-yne (h) Complete halogenation (Cl2) of 3-Ethyl-5-methyl-1,6,8-decatriyne (i) Partial hydrogenation using Lindlar's Catalyst 2,2,5,5-Tetramethylhex-3-yne (i) Reaction of 3.4-Dimethylcyclodecyne with sodium amidearrow_forward
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