ORGANIC CHEMISTRY-PACKAGE >CUSTOM<
10th Edition
ISBN: 9781260028355
Author: Carey
Publisher: MCG CUSTOM
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Textbook Question
Chapter 28.9, Problem 8P
Problem 28.8
How will the average chain length of polystyrene vary with the amount of butyllithium used to initiate
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Chapter 28 Solutions
ORGANIC CHEMISTRY-PACKAGE >CUSTOM<
Ch. 28.2 - Prob. 1PCh. 28.3 - Prob. 2PCh. 28.3 - Prob. 3PCh. 28.4 - Prob. 4PCh. 28.7 - Problem 28.5 (a) Write a chemical equation for the...Ch. 28.7 - Prob. 6PCh. 28.8 - Prob. 7PCh. 28.9 - Problem 28.8 How will the average chain length of...Ch. 28.9 - Prob. 9PCh. 28.11 - Prob. 10P
Ch. 28.11 - Prob. 11PCh. 28.12 - Prob. 12PCh. 28.13 - Prob. 13PCh. 28.14 - Prob. 14PCh. 28 - Prob. 15PCh. 28 - Prob. 16PCh. 28 - Prob. 17PCh. 28 - Prob. 18PCh. 28 - Prob. 19PCh. 28 - Prob. 20PCh. 28 - Of the following monomers, which one would undergo...Ch. 28 - Prob. 22PCh. 28 - Polymerization of styrene can occur by a...Ch. 28 - Styrene undergoes anionic polymerization at a...Ch. 28 - Prob. 25PCh. 28 - Prob. 26PCh. 28 - Prob. 27PCh. 28 - Prob. 28PCh. 28 - Prob. 29PCh. 28 - Prob. 30PCh. 28 - Prob. 31PCh. 28 - Prob. 32DSPCh. 28 - Prob. 33DSPCh. 28 - Prob. 34DSPCh. 28 - Prob. 35DSPCh. 28 - Prob. 36DSPCh. 28 - Prob. 37DSPCh. 28 - Prob. 38DSP
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- Draw a stepwise mechanism for the anionic polymerization of styrene (CH2=CHPh) to form polystyrene – [CH2CHPh]n – using BuLi as the initiator. Use CO2 as the electrophile that terminates the chain mechanism.arrow_forwardIf u want helpful rating do it fast Terephthaloyl dichloride and p-phenylenediamine were polymerized to form a copolymer called Kevlar with M, of 250,000 g/mol. Calculate: D) polydispersity indexarrow_forwardConsider monomers A–C. (a) Rank the monomers in order of increasingreactivity in cationic polymerization. (b) Rank the monomers in order ofincreasing reactivity in anionic polymerization.arrow_forward
- Poly(vinyl alcohol) is a polymer used to make fibers and adhesives. It is synthesized by hydrolysis or alcoholysis of the polymer obtained from polymerization of vinyl acetate as shown below. a. Why is poly(vinyl alcohol) not prepared by polymerizing vinyl alcohol? b. Is poly(vinyl acetate) a polyester?arrow_forwardPropylene forms only oligomer under normal free radical conditions, yet the monomer forms high-molecular-weight polymer if it is polymerized while trapped in the channels of a crystalline host substance such as urea or thiourea. Explain [G. Di Silvestro, P. Sozzani, and M. Farina, Polym. Preprints, 27(1), 92, 1986].arrow_forwardAlthough chain branching in radical polymerizations can occur by intermolecular H abstraction as shown in Mechanism 30.2, chain branching can also occur by intramolecular H abstraction to form branched polyethylene that contains butyl groups as branches.a. Draw a stepwise mechanism that illustrates which H must be intramolecularly abstracted to form butyl substituents.b. Suggest a reason why the abstraction of this H is more facile than the abstraction of other H’s.arrow_forward
- Draw a stepwise mechanism for the following polymerization reaction.arrow_forward(a) Which monomer is most likely to undergo anionic polymerization? Justify your choice. ( b)Which one ismost likely to undergo cationic polymerization? Justify your choice.arrow_forwardChoose the correct option. Guess the type of polymerization if you are provided with azobisisobutyronitrile and acrylonitrile. a) Free radical polymerizationb) Cationic polymerizationc) Anionic polymerizationd) Condensation polymerizationarrow_forward
- Although chain branching in radical polymerizations can occur by intermolecular H abstraction as shown in Mechanism 28.2, chain branching can also occur by intramolecular H abstraction to form branched polyethylene that contains butyl groups as branches.a. Draw a stepwise mechanism that illustrates which H must be intramolecularly abstracted to form butyl substituents. b. Suggest a reason why the abstraction of this H is more facile than the abstraction of other H's.arrow_forwardWhat species, in addition to a dead polymer, is produced in a chain-transfer reaction with a macrocarbocation in cationic chain polymerization?arrow_forward(a) Show how poly(propylene oxide) can be synthesized via anionic ring-opening polymerization. (b) Draw the mechanism for the initiation and first two propagation steps.arrow_forward
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