Theory and Applications

1st Edition - January 1, 1969

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  • Editor: Frederick R. Eirich
  • eBook ISBN: 9781483272986

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Rheology: Theory and Applications, Volume 5 focuses on overtly fluid behavior of polymers, including the theory of large deformations, thermoelastic effects, elastic phenomena observed during the extrusion of polymeric melts, and theories of the structure of liquids and glasses. The selection first elaborates on the application of large deformation theory to the thermomechanical behavior of rubberlike polymers and unstable flow of molten polymers. Discussions focus on the mechanism proposed for unstable flow, ripple and associated effects, direct observation of waviness phenomena, empirical behavior of porous, unfilled, and filled rubberlike polymers, and problems connected with the interpretation of mechanical response parameters. The text then examines elasticity effects in polymer extrusion and strength and extensibility of elastomers. The publication takes a look at free volume and polymer rheology and studies of the deformation of crystalline polymers. Topics include the contribution of the two orientation processes to the birefringence, deformation of superstructure, rate of orientation of crystalline regions, free volume and physical state, glass transition and free volume, and reappraisal of time-temperature superposition. The manuscript also elaborates on the deformation and dissipative processes in high polymeric solids and the thermodynamics of deformation. The selection is a vital source of data for researchers interested in the theories and applications of rheology.

Table of Contents

  • List of Contributors


    Contents of Previous Volumes

    1. Application of Large Deformation Theory to the Thermomechanical Behavior of Rubberlike Polymers—Porous, Unfilled, and Filled

    I. Introduction

    II. Brief Review of Large Deformation Theory (Isothermal)

    III. Empirical Behavior of Porous, Unfilled, and Filled Rubberlike Polymers

    IV. Thermoelastic Theory of Large Homogeneous Deformation

    V. Evaluation of Failure Data

    VI. Problems Connected with the Interpretation of Mechanical Response Parameters


    2. Unstable Flow of Molten Polymers

    I. Introduction

    II. Apparatus and Terminology

    III. Waviness

    IV. Direct Observation of Waviness Phenomena

    V. Unstable Flow of a Second Type—Ripple and Associated Effects

    VI. Mechanism Proposed for Unstable Flow


    3. Elasticity Effects in Polymer Extrusion

    I. Introduction

    II. Experimental Measurements and Analysis

    III. Experimental Results on Postextrusion Swelling

    IV. Die Geometry and Postextrusion Swell

    V. Postextrusion Die Swell and Normal Stresses

    VI. Elasticity and Molecular Structure

    VII. Flow Defects and Melt Elasticity

    VIII. Die Entry Effects

    IX. Flow Defects Other than Melt Fracture


    4. Strength and Extensibility of Elastomers

    I. Introduction

    II. Characterization of Ultimate Properties in Simple Tension

    III. Dependence of Ultimate Tensile Properties on Network Structure

    IV. Considerations of the Rupture Mechanism

    V. Crystallization and Reinforcement

    VI. Concluding and Summary Remarks


    5. Free Volume and Polymer Rheology

    I. The Glass Transition and Free Volume

    II. Reappraisal of Time-Temperature Superposition

    III. Thermodynamic Equations of State

    IV. Free Volume and Physical State

    V. Summary and Conclusions

    Appendix I : Temperature-Pressure Dependent Free Volume for a Lennard-Jones Lattice

    Appendix II: Comparison of Classical and Van der Waals' Equations of Imperfect Gases


    6. Studies of the Deformation of Crystalline Polymers

    I. Introduction

    II. Relative Orientation of Ordered and Disordered Regions

    III. Rate of Orientation of Crystalline Regions

    IV. Deformation of Superstructure

    V. Contribution of the Two Orientation Processes to the Birefringence

    VI. Studies on Oriented Samples

    VII. Dynamic Birefringence


    7. Deformation and Dissipative Processes in High Polymeric Solids

    I. Introduction

    II. Experimental Methods and Typical Results

    III. Mechanisms of Large Deformations of Crystalline Polymers

    IV. Relaxation Mechanisms

    V. Mechanisms of Deformation—Concluding Remarks


    8. Thermodynamics of Deformation; Calorimetric Investigations of Deformation Processes

    I. Introduction

    II. Definition of the Problem

    III. Complete Energy Balance for the Deformation

    IV. Experimental Methods

    V. Theory

    VI. Selected Examples


    9. The Rheology of Textile Fabrics

    I. The Technical Background and Principles of Fabric Structure

    II. The Geometry and Tensional Behavior of Yarns

    III. Measurements of Rheological Properties of Fabrics

    IV. Structure and Elastic Behavior of Fabrics

    V. Inelastic Behavior of Fabrics

    VI. Dynamic and Strength Properties of Fabrics

    VII. The Range of Fabric and Related Structures

    Appendix : Recent Work


    10. Rheology of Paper

    I. Introduction

    II. Structural Aspects

    III. Stress-Strain Properties

    IV. Stress Relaxation

    V. The F(σ0) Relationship with Special Reference to Internal Stresses in Paper

    VI. Creep

    VII. Dynamic Mechanical Properties

    VIII. Final Remarks


    Author Index

    Subject Index

Product details

  • No. of pages: 661
  • Language: English
  • Copyright: © Academic Press 1969
  • Published: January 1, 1969
  • Imprint: Academic Press
  • eBook ISBN: 9781483272986

About the Editor

Frederick R. Eirich

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