Polymer Science and Technology No part of this digital document may be reproduced, stored in a retrieval system or transmitted in any form or by any means. The publisher has taken reasonable care in the preparation of this digital document, but makes no expressed or implied warranty of any kind and assumes no responsibility for any errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of information contained herein. This digital document is sold with the clear understanding that the publisher is not engaged in rendering legal, medical or any other professional services. Polymer Science and Technology A Study of Polymer Dynamics by Solid-State NMR John Nobleman (Author) 2021. ISBN: 978-1-53619-715-0 (Hardcover) 2021. ISBN: 978-1-53619-803-4 (eBook) What to Know about Lignin María González Alriols, PhD Jalel Labidi, PhD M. Özgür Seydibeyoğlu, PhD (Editors) 2021. ISBN: 978-1-53619-152-3 (Hardcover) 2021. ISBN: 978-1-53619-222-3 (eBook) Encyclopedia of Polymer Composites Mikhail Lechkov Sergej Prandzheva (Editors) 2010. ISBN: 978-1-60741-717-0 (Hardcover) 2010. ISBN: 978-1-61122-476-4 (eBook) Polydimethylsiloxane: Structure and Applications Philip N. Carlsen (Editor) 2020. ISBN: 978-1-53617-590-5 (Hardcover) 2020. ISBN: 978-1-53617-611-7 (eBook) Polymer Materials with Smart Properties Maria Bercea (Editor) 2013. ISBN: 978-1-62808-876-2 (Hardcover) 2013. ISBN: 978-1-62808-877-9 (eBook) More information about this series can be found at https://novapublishers.com/product-category/series/polymer-science-and- technology-series/ V. A. Ryzhov Far Infrared and Terahertz Spectroscopy of Polymers Copyright © 2022 by Nova Science Publishers, Inc. DOI: https://doi.org/10.52305/YKKP7083 All rights reserved. No part of this book may be reproduced, stored in a retrieval system or transmitted in any form or by any means: electronic, electrostatic, magnetic, tape, mechanical photocopying, recording or otherwise without the written permission of the Publisher. We have partnered with Copyright Clearance Center to make it easy for you to obtain permissions to reuse content from this publication. Simply navigate to this publication’s page on Nova’s website and locate the “Get Permission” button below the title description. This button is linked directly to the title’s permission page on copyright.com. Alternatively, you can visit copyright.com and search by title, ISBN, or ISSN. For further questions about using the service on copyright.com, please contact: Copyright Clearance Center Phone: +1-(978) 750-8400 Fax: +1-(978) 750-4470 E-mail: [email protected]. 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In addition, no responsibility is assumed by the Publisher for any injury and/or damage to persons or property arising from any methods, products, instructions, ideas or otherwise contained in this publication. This publication is designed to provide accurate and authoritative information with regard to the subject matter covered herein. It is sold with the clear understanding that the Publisher is not engaged in rendering legal or any other professional services. If legal or any other expert assistance is required, the services of a competent person should be sought. FROM A DECLARATION OF PARTICIPANTS JOINTLY ADOPTED BY A COMMITTEE OF THE AMERICAN BAR ASSOCIATION AND A COMMITTEE OF PUBLISHERS. Additional color graphics may be available in the e-book version of this book. Library of Congress Cataloging-in-Publication Data ISBN: (cid:28)(cid:26)(cid:27)(cid:16)(cid:20)(cid:16)(cid:25)(cid:27)(cid:24)(cid:19)(cid:26)(cid:16)(cid:27)(cid:22)(cid:19)(cid:16)(cid:19)(cid:3)(cid:11)(cid:72)(cid:37)(cid:82)(cid:82)(cid:78)(cid:12) Published by Nova Science Publishers, Inc. † New York Contents Preface .......................................................................................... vii List of Abbreviations .................................................................................. ix Introduction ......................................................................................... xiii Chapter 1 Features of Infrared Spectra of Polymers ............................1 Chapter 2 Skeletal Torsion-Deformation Vibrations in Amorphous Polymers: Theoretical Predictions and Experiment ..................................................................11 Chapter 3 Absorption by the Poly Mechanism in Low-Frequency IR Spectra of Polymers .......................21 Chapter 4 Low-Frequency IR Spectra and Molecular Interpretation of Relaxation Processes in Amorphous Polymers .............37 Chapter 5 Low-Frequency IR Spectra as a Source of Direct Information about Interchain Interactions in Polymers ........................................................................83 Conclusion ......................................................................................... 117 References ......................................................................................... 119 Appendix ......................................................................................... 129 Author's Contact Information ................................................................ 163 Index ......................................................................................... 165 Preface The presented work summarizes and systematizes an extensive experimental material of the results of studying polymers using spectroscopy in the low- frequency infrared region. Today, spectroscopic studies in the far infrared region are becoming an important tool for characterizing the physical properties of polymers, determined by molecular dynamics and the level of molecular interactions. Low-frequency spectroscopy of intermolecular interactions is the original and most informative source and criterion for establishing the presence of a hydrogen bond in biological substances, multiplets and clusters in ionomers, a criterion for crystallinity, etc. Far IR spectroscopy has proven to be productive in deciphering the molecular nature of solid-state (δ, β, and γ) relaxation transitions in polymers. This was the result of (1) evaluating the potential barriers and sizes of molecular motion units from the spectra, (2) finding empirical correlations between the spectral parameters and molecular characteristics of polymers, (3) comparing the results with activation barriers for relaxation transitions.