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Related Concept Videos

Polymer Classification: Crystallinity01:21

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Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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Manipulating Semicrystalline Polymers in Confinement.

Nitin Shingne1, Markus Geuss2,3, Thomas Thurn-Albrecht1

  • 1Institute of Physics, Martin Luther University Halle-Wittenberg , Heinrich-Damerow-Str. 4, D-6120 Halle, Germany.

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|July 21, 2017
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Summary
This summary is machine-generated.

Researchers developed processing strategies to control polymer nanostructure solidification. These methods allow tuning crystallization kinetics and crystal orientation in confined polymers like poly(vinylidene fluoride) (PVDF).

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Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Polymer properties are dictated by solid-state microstructure under nanoscale confinement.
  • Understanding and controlling polymer microstructure development is crucial for advanced applications.

Purpose of the Study:

  • To present processing strategies for controlling polymer nanostructure solidification.
  • To demonstrate manipulation of crystallization kinetics and microstructural features in confined polymers.

Main Methods:

  • Adaptation of bulk polymer processing techniques for nanoscale applications.
  • Utilizing supramolecular nucleating agents to influence crystallization kinetics.
  • Controlling crystallization temperature to tune microstructural features and crystal orientation.

Main Results:

  • Supramolecular nucleating agents effectively modify crystallization kinetics of confined poly(vinylidene fluoride) (PVDF).
  • Crystallization temperature influences microstructural features, including crystal orientation.
  • High crystallization temperatures and extended annealing promote the formation of the PVDF γ-modification.

Conclusions:

  • Developed strategies enable control over polymer nanostructure solidification and microstructure.
  • The formation of the PVDF γ-modification facilitates the production of ferro/piezoelectric nanostructures.
  • These approaches offer new possibilities for processing polymer nanostructures with tailored properties.