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Self-Healable Fluorinated Copolymers Governed by Dipolar Interactions.

Siyang Wang1, Marek W Urban1

  • 1Department of Materials Science and Engineering, Clemson University, Clemson, SC, 29634, USA.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|July 7, 2021
PubMed
Summary

This study introduces self-healing thermoplastic copolymers utilizing inherent dipolar interactions. These materials autonomously repair damage multiple times under ambient conditions, offering a versatile alternative to traditional modifications.

Keywords:
fluoropolymersself-healing polymersvan der Waals dipolar interactions

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Area of Science:

  • Polymer Science
  • Materials Science
  • Organic Chemistry

Background:

  • Dipolar forces, though weak, are crucial for the mechanical integrity of polymers.
  • Self-healing materials are highly sought after for extending product lifespan and reducing waste.
  • Fluorinated copolymers offer unique properties due to strong dipole moments.

Purpose of the Study:

  • To develop self-healable thermoplastic copolymers using noncovalent dipolar interactions.
  • To investigate the role of specific dipolar interactions (C–F, C=O, CH2/CH3) in enabling autonomous self-healing.
  • To explore the potential for designing self-healable commodity thermoplastics without chemical modification.

Main Methods:

  • Utilizing inherent dipolar interactions within fluorine-containing copolymers.
  • Analyzing the influence of monomer sequence and molar ratios on copolymer tacticity and self-healing.
  • Characterizing the viscoelastic response governing macroscopic self-healing behavior.

Main Results:

  • Demonstrated autonomous, multicycle self-healing of fluorinated copolymers at ambient conditions.
  • Identified specific dipolar interactions (dipole-dipole, dipole-induced dipole, induced-dipole induced dipole) as key drivers of self-healing.
  • Established a link between dipolar forces, monomer composition, and copolymer tacticity for enhanced self-healing.

Conclusions:

  • Dipolar forces provide an effective mechanism for achieving autonomous self-healing in thermoplastic copolymers.
  • This approach eliminates the need for external stimuli or chemical modifications, enabling multiple repair cycles.
  • The findings open avenues for designing advanced, self-healable commodity thermoplastics for diverse applications.