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Physical Aspects of Polymer Self–Assembly

  • ID: 3387154
  • Book
  • 384 Pages
  • John Wiley and Sons Ltd
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Although the concept of molecular self–assembly has been recognized and evolved for over four decades, it is only during the past few years that research activity has intensified in the area. Self–assembling polymers result in desirable functional properties and structures like micelles, membranes, vesicles, and liquid crystals. The concept of polymer self–assembly is an increasingly popular branch of polymer chemistry and associated with a variety of novel applications in fields like nanotechnology, polymer physics, and engineering and advanced morphological, smart, and stimuli–responsive properties.

Offering an overview of principles and techniques, Physical Aspects of Polymer Self–Assembly covers all major categories of self–assembled polymers properties, processes, and design. The opening chapters define polymers and self–assembly to introduce fundamental features, like self–sorting, self–assembly in solution, chain folding, foldamers, and kinetic self–assembly. Each of the following chapters then focuses on the self–assembly of a different polymer type and provide in–depth descriptions of morphologies, reactions, and properties. The author uses examples to further illustrate the possibilities of polymer self–assembly and initiate research in emerging fields, concluding with a discussion on challenges and outlook of the field.

For practicing polymer scientists in academia or industry, Physical Aspects of Polymer Self–Assembly offers a valuable one–stop reference and resource that:

          Provides an organized, comprehensive overview of polymer self–assembly, its fundamentals, principles, and applications
    Includes chapters on molecular forces leading to self–assembly, features of self–assembly of polymers, block copolymers, supramolecular polymers, rotaxanes, polymer gels, and small molecules in polymer matrices
          Focuses on novel applications, like conjugated polymers, gels, fibers, nanomaterials, and stimuli–responsive polymers that can be applied to polymer science, materials science, and nanotechnology
          Examines state–of–the–art concepts, like lithographic patterning, and foldaxane

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Preface xi

1 Introduction 1

1.1 Polymer Tacticity 1

1.2 Big versus Small 5

1.3 Entanglement 5

1.4 Excluded Volume 8

1.5 Free Volume 10

1.6 Self Assembly 10

1.7 Polymer Self Assembly 12

References 13

2 Molecular Forces 17

2.1 Van der Waals Interaction 17

2.2 Hydrogen Bond 21

2.3 C H Interaction 27

2.4 Halogen Bond 29

2.5 Other Hydrogen Bonds 30

2.6 Coulombic Interaction 31

References 33

3 Features of Self Assembly 37

3.1 Self Sorting Small Molecules 37

3.2 Polymer Self Sorting 43

3.3 Concentration Dependent Association 48

3.4 Polymer Guest Molecule Recognition 49

3.5 Sergeant Soldier Phenomenon 55

3.6 Majority Rules 61

3.7 Chain Folding 65

3.8 Foldamers 79

3.9 Single Chain Polymer Crystals and Nanoparticles 91

References 99

Further Reading 104

4 Supramolecular Macromolecules and Polymers 105

4.1 Supramolecular Macromolecules 105

4.2 Supramolecular Polymers 110

4.3 Modular Supramolecules 123

4.4 Solvent Influence 127

4.5 Comb Polymers 140

References 149

Further Reading 152

5 Block Copolymers 153

5.1 Theoretical Aspects 153

5.2 Diblock Copolymers 158

5.3 Organic/Inorganic Diblocks 165

5.4 Blends of Diblock Copolymers 170

5.5 Diblock/Homopolymer Blends 172

5.6 BCP/Small Molecular Supramolecular Association 175

5.7 Triblock Copolymers 177

5.8 Some Applications of Gyroid Morphology 190

5.9 Graphoepitaxy 201

5.10 Porous Structures 211

5.11 Crystalline Block Copolymers 223

5.12 Nanotechnology 223

References 225

Further Reading 230

6 Rotaxanes and Polyrotaxanes 231

6.1 Definitions and Early Work 231

6.2 Cyclodextrins for Inclusion 237

6.3 Selective Threading 244

6.4 Micelles of Double Hydrophilic Block Copolymers via Rotaxane Formation 249

6.5 Homopolymer Micelles 252

6.6 Linear and Cyclic PDMS 253

6.7 Abrasion Resistance 254

6.8 Beyond Linear Polymers and , , and CDs 256

6.9 Insulated Molecular Wires 258

6.10 Molecular Switches and Machines 260

6.11 Supramolecular Oligomeric and Polymeric Rotaxanes 268

6.12 Rotaxane and Polyrotaxane Based Muscles 270

References 277

Further Reading 280

7 Polymer Gels 281

7.1 One Dimensional Growth 281

7.2 Definitions and Classifications 283

7.3 Gels with Noncrystallizable Polymers 285

7.4 Gels with Crystallizable Polymers 295

7.5 Add a Sergeant to the Soldiers to Cause Gelation 300

7.6 Interaction Mediated Gelation 308

7.7 Polymer Compatibilized Small Molecule/Polymer Gels 316

7.8 Monomer Self Assembly and Polymer Gels 318

7.9 Poor Man s Rheology 321

References 324

8 Small Molecule Self Assembly in Polymer Matrices 329

8.1 Phase Separation in Charge Transport Polymer Layers 329

8.2 Glass Transition and Diffusion of Small Molecules 331

8.3 Subsurface Self Assembly of Small Molecules in Polymer Matrices 333

8.4 Solvent Effect on Self Assembly of Small Molecules in Polymer Matrices 338

8.5 Polymer Compatibilized Small Molecule Assembly in Polymer Matrices 343

8.6 Polymerization Induced Phase Separation and Reaction Induced Phase Separation 344

8.7 PIPS for LC Displays 345

8.8 PIPS with Supramolecular Assembly 347

8.9 PIPS for Porous Structures 347

8.10 Surfactant/Polymer Assembly 350

References 356

Index 359

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P. R. Sundararajan
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