The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism. Concept Introduction: Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium. Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

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Answer 1

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Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

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1) Which type of polymerization will the molecule shown most readily undergo? a. Anionic b. Cationic C. Radical d. Ring-opening e. Will not polymerize

a. What alkene monomer is required to form this polymer? b. Give the stepwise mechanism for the synthesis of 2-bromopropane from propane using radical bromination.

1.- Why are carbon nanotubes and graphene currently considered as reinforcing additives for polymers? What effect do they have on the polymer? What is the mechanism by which they can enhance the Young’s modulus and tensile strength of a polymer? 2.- Kapton is the trade name of a polyimide a) How would you synthesize this polymer? b) During the first stage of the reaction, poly(amic acid) is formed. If you need to follow this stage of the polymerization, what spectroscopic techniques would you use and what groups should you focus on? c) How would you form Kapton films, which can be used as support for solar sails? d) What are the disadvantages of Kapton that have limited their use? Why does this polymer present this weakness?

Answer 2

Question

Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

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Answer 3

Question

Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

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Answer 4

Question

Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

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Answer 5

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

Answer 6

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

Answer 7

Chapter 15.2, Problem 11P

(a)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

Concept Introduction:

Anionic polymerization: Initiator will be a nucleophile which reacts with the monomer to form a propagating site that is an anion and the initiator can be compounds like sodium amide or butyllithium.

Nucleophile will attack on the alkene and the alkene contains a substituent that can withdraw electrons by resonance.

Answer 8

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

Answer 9

(b)

Interpretation Introduction

Interpretation:

The polymerization of 2,2-dimethyloxirane should be described by cationic mechanism.

Concept Introduction:

Cationic polymerization: The polymerization in which an electrophile acts as an initiator and adds to the monomer which leads to the formation of a carbocation.

The initiator widely used is a Lewis acid and in the polymerization the electrophile adds to the sp2 carbon bonded to the most number of hydrogens.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 15.2 - Prob. 1P Ch. 15.2 - Prob. 2P Ch. 15.2 - Prob. 3P Ch. 15.2 - Prob. 4P Ch. 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. 7P Ch. 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

Solution Summary: The author explains that the polymerization of 2,2-dimethyloxirane should be derived by anionic mechanism.

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