Oriented polymer materials / / edited by Stoyko Fakirov

• Record Nr.: UNINA9911020269903321
• Pubbl/distr/stampa: Weinheim, : Wiley-VCH, 2002
• ISBN: 9786611842697; 9781281842695; 1281842699; 9783527615056; 3527615059; 9783527615049; 3527615040
• Descrizione fisica: 1 online resource (536 p.)
• Altri autori (Persone): FakirovStoyko
• Disciplina: 547.84; 620.192
• Soggetti: Polymers
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references and indexes.
• Nota di contenuto: Oriented Polymer Materials; CONTENTS; Chapter 1. Problems of the physics of the oriented state of polymers; 1 . Introductory considerations; 1.1. Interplay of fundamental and applied problems . Molecular cybernetics; 1.2. Principal routes to the formation of uniaxially oriented structures in polymers; 2 . Configurational information and orientation phenomena in synthetic polymers; 2.1. Direct generation of orientational order from solutions and melts . Orientational hardening, orientational crystallization, and orientational catastrophes; 2.2. Assemblage; liquid crystalline polymers; 2.3. Reconstruction3. Failure under load; 4. Some specific properties of superoriented polymers; 5. Technological implications; 6. General conclusions and summary; 6.1. What is clear?; 6.2. What is incomprehensible?; 6.3. What needs better understanding?; References; Chapter 2. Structural basis of high-strength high-modulus polymers; 1. Introduction; 2. Structural transformation in semicrystalline polymers on stretching; 2.1. Deformation mechanisms at small strain; 2.2. Folded-extended chain solid phase transition in the neck region; 2.3. Micro- and macrofibrillar structure in oriented polymers and its plastic deformation2.4. Drawing arrest and fracture of oriented polymers; 2.5. Alternative mechanisms of drawing; 3. Deformation-induced strengthening of semicrystalline polymers; 3.1. Structural kinetic approach to the enhancement of polymer characteristics by deformation; 3.2. Physical criteria for the optimization of the drawing process; 3.3. Optimal molecular weight and molecular weight distribution; 4. Mechanical properties of highly oriented polymers; 5. Thermal properties of superstrong high-modulus polymers; 6. Structural peculiarities of highly oriented polymersReferences; Chapter 3. X-ray diffraction by quasiperiodic polymer structures; 1. Introduction; 2. Qualitative phenomenological aspects; 2.1. Fibre diagrams; 2.2. Crystal density, chain cross section and chain conformation; 2.3. Anisotropy perpendicular to the chain direction, planes of plates; 2.4. Position sphere; 2.5. Lattice distortions of the first and second kind . Distortion parameter; 2.6. Special lattice types; 2.7. Small-angle scattering, fibrils, layer lattices; 3 . Basics of experiments; 3.1. X-ray spectrum and absorption; 4 . Theoretical relationships4.1. Structure factor; 4.2. The Ewald sphere; 4.3. Pair distribution; 4.4. A special application example; 5 . Simple lattice models; 5.1. Ideal periodic lattices; 5.2. Distortions of the first kind; 5.3. Distortions of the second kind; 5.4. Inhomogeneous coordination statistics; References; Chapter 4. Characterization of polymer deformation by vibrational spectroscopy; 1. Introduction; 2. Experimental and instrumentation; 3. Orientational measurements by infrared dichroism; 4. Segmental mobility in liquid crystalline side-chain polymers; 5. Rheo-optical FT-IR studies of the poly(ethylene terephthalate) film forming process
• Sommario/riassunto: A book on the study of orientation and oriented polymers This book begins with an overview of the orientation phenomenon. Oriented Polymer Materials was published to focus on the importance of oriented polymeric materials. It includes basic techniques for the study and characterization of oriented polymers. It also covers different representatives of oriented polymer materials and approaches to the improvement of their mechanical properties. The book contains chapters produced by an array of contributing authors from around the world.