Polymer physics

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The polymer physics is a branch of condensed matter , in their physical behavior is polymers investigated.

Topics examined include

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• Characterization: degree of polymerization , chain cross-linking
• microscopic structure: entanglements, crystallinity
• Polymer melts
• Polymer alloys
• Glass transition
• Crystallization
• Polymer solutions
• Polymer dispersions
• Polymer brushes
• Rubber elasticity

Investigation methods

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experiment

• Scattering experiments: X-ray scattering , neutron scattering , static and dynamic light scattering
• direct surface observation through atomic force microscopy
• Ellipsometry , polarizing microscopy
• Dynamic differential calorimetry (DSC)

Sample preparation

In addition to macroscopic specimens, thin, homogeneous layers are often examined. B. by

• Spin coating
• Film deposition ( Langmuir-Blodgett layer )

be won.

theory

• Flory Huggins model
• Self-Consistent Field Theory (SCF)
• Single Chain Mean Field (SCMF)

simulation

• Monte Carlo simulation
• Molecular dynamics simulation

The simulations are an important tool for studying the polymers. Many interesting quantities are not accessible in the experiment. The theoretical models, on the other hand, have difficulties in describing fluctuations and are often only exact in borderline cases. Simulations also provide data on quantities that are not experimentally accessible and can also provide results where the theory is not exact. Therefore simulations are a link between experiment and theory. Due to the limited computer performance, however, only small systems can be simulated, which are often much smaller than the experimentally accessible or application-relevant systems.

See also

• Freely jointed chain model
• Wormlike chain model