Viscoelastic behavior of rubbery materials / C.M. Roland.

Format:

Book

Author/Creator:

Roland, C. M. (Charles Michael), 1952-

Language:

English

Subjects (All):

Polymers--Mechanical properties.

Polymers.

Viscoelasticity.

Physical Description:

viii, 332 pages : illustrations ; 26 cm

Place of Publication:

Oxford ; New York : Oxford University Press, 2011.

Summary:

The enormous size of polymer molecules causes their molecular motions to span a broad range of length scales and give rise to viscoelastic behavior. This rate-dependence of the properties is a predominant characteristic, of soft materials [rubbers, biopolymers, lubricants, adhesives, etc]. Improving the performance and developing new applications for soft materials require ah understanding of the basic principles of how molecular motions underlie physical properties. This text is intended to provide grounding in fundamental aspects of the dynamic behavior of rubbery materials, adopting a molecular perspective in its Treatment for emphasize how microscopic processes are connected to the observed macroscopic behavior. The latest discoveries and advances in the science and technology of rubbery materials are described and critically analyzed. Book jacket.

Contents:

1 Introduction 1

1.1 Viscoelasticity and high elasticity in polymers 2

1.2 Modes of motion 7

1.3 yFluctuations and linear response theory 28

References 33

2 Cooperative local dynamics - the glass-transition zone 38

2.1 Non-exponential and non-Arrhenius behavior 42

2.2 Temperature and density effects on Ta 48

2.3 Dispersion of relaxation times and dynamic heterogeneity 54

2.4 Johari-Goldstein secondary relaxations 60

2.5 Decoupling phenomena 65

2.6 Applications 69

References 72

3 Chain dynamics 79

3.1 Unentangled polymers 79

3.2 Entangled polymers 87

3.3 Practical aspects of diffusion 104

References 114

4 Networks 120

4.1 henomenological elasticity models 121

4.2 Chain models 128

4.3 Constraint models 131

4.4 Role of molecular motions in the elastic response 135

4.5 lternative network structures 139

References 154

5 Constitutive modeling, non-linear behavior, and the stress-optic law 160

5.1 Linearity and the superposition principle 160

5.2 Internal stress and optical birefringence 164

5.3 Reversing strain histories 175

5.4 Empirical rules for non-linear flow 182

5.5 Payne effect 187

References 193

6 educed variables and characteristic relaxation times 199

6.1 Time-temperature superpositioning 199

6.2 Thermorheological complexity 207

6.3 Density scaling of the dynamics 211

6.4 Characteristic relaxation times 227

References 232

7 Blends 236

7.1 Dynamic properties of miscible polymer blends 236

7.2 Relaxation models for miscible blends 249

7.3 Phase-separated blends 255

References 261

8 Liquid-crystalline materials 264

8.1 Liquid crystals 265

8.2 Liquid-crystal elastomers 275

References 279

9 Bioelastomers 282

9.1 Proteins 282

9.2 Bioelastomers 284

References 295

10 Confinement effects on polymer dynamics 298

10.1 Spatial confinement 298

10.2 Filler effects 306

References 315.

Notes:

Includes bibliographical references and index.

ISBN:

9780199571574

0199571570

OCLC:

701807846