Bovey / Meites Polymer Conformation and Configuration

A Polytechnic Press of the Polytechnic Institute of Brooklyn Book
1. Auflage 2013
ISBN: 978-1-4832-7689-2
Verlag: Elsevier Science & Techn.
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 188 Seiten, Web PDF

Polymer Conformation and Configuration focuses on the stereochemistry and conformation of vinyl polymers and the application of nuclear magnetic resonance (NMR) spectroscopy to their study and polypeptide conformation by NMR and optical methods. The book first offers information on the configuration of vinyl polymer chains and configurational sequences and the mechanism of vinyl propagation. Discussions focus on the effect of polymerization temperature, polyisopropyl acrylate, polypropylene, Coleman-Fox Propagation Mechanism, and sequence statistics. The text then elaborates on the observation of polymer chain conformation by NMR, including model compound conformations, averaging of vicinal couplings, conformer populations, and polymer chain conformation. The publication also takes a look at the conformations of N-disubstituted polypeptide chains. The manuscript is a valuable reference for readers interested in polymer conformation and configuration.

Autoren/Hrsg.

Bovey, Frank A.

Meites, Louis

Inhaltsverzeichnis

1;Front Cover;1
2;Polymer Conformation and Configuration;4
3;Copyright Page ;5
4;Table of Contents;10
5;Foreword;6
6;Author's Preface;8
7;Chapter 1. The Configuration of Vinyl Polymer Chains;12
7.1;1. Molecular Symmetry and its Observation by NMR;12
7.2;2. Polymer Spectra: Polymethyl Methacrylate;19
7.3;3. The Effect of Polymerization Temperature;31
7.4;4. Polyvinyl Chloride;32
7.5;5. Polystyrene;38
7.6;6. Polyisopropyl Acrylate;41
7.7;7. Polypropylene;43
7.8;References for Chapter I;48
8;Chapter 2. Configurational Sequences and the Mechanism of Vinyl Propagation;52
8.1;1. Sequence Statistics;52
8.2;2. The Coleman-Fox Propagation Mechanism;61
8.3;3. The Direction of Addition to the Double Bond; ß-Carbon Stereochemistry;65
8.4;4. The Significance of Cis and Trans Addition and the Nature of the Propagation Species;76
8.5;References for Chapter II;81
9;Chapter 3. The Observation of Polymer Chain Conformation by NMR;84
9.1;1. Model Compound Conformations;84
9.2;2. The Averaging of Vicinal Couplings;84
9.3;3. Conformer Populations;89
9.4;4. 2,4,6-Trisubstituted Heptanes;96
9.5;5. Polymer Chain Conformation;99
9.6;References for Chapter III;107
10;Chapter 4. Optical and NMR Studies of the a-Helix and the Helix-Coil Transition;109
10.1;1. Introduction;109
10.2;2. Circular Birefringence;109
10.3;3. Circular Dichroism;113
10.4;4. Molecular Origin of Optical Activity;115
10.5;5. The Dependence of Circular Birefringence and Circular Dichroism on Wavelength: Cotton Bands;116
10.6;6. Band Overlap in ORD and CD Spectra;119
10.7;7. The a-Helix;120
10.8;8. NMR Observations of the a-Helix-Random Coil Transition;125
10.9;9. Correlation of NMR and CD Observations;134
10.10;10. Origin of the Helix-Coil Transition;135
10.11;References for Chapter IV;140
11;Chapter 5. The Conformation of N-Disubstituted Polypeptide Chains;143
11.1;1. Poly-L-Proline;143
11.2;2. Poly-L-Acetoxyproline;151
11.3;3. Poly-N-Methyl-L-Alanine;152
11.4;4. Polysarcosine;161
11.5;References for Chapter V;167
12;Author Index;170
13;Subject Index;179