Hydrogen-Bond-Mediated Polymers: Strengthening, Toughening, and Stabilizing Effects.

Area of Science:

• Polymer Science and Engineering
• Materials Chemistry
• Supramolecular Chemistry

Background:

• Traditional polymer design focuses on covalent structures, often overlooking the significant impact of noncovalent interactions.
• Noncovalent interactions, particularly hydrogen bonds, offer a powerful but underexplored avenue for polymer property modulation.
• A paradigm shift towards noncovalent interaction engineering is needed for next-generation polymer innovation.

Purpose of the Study:

• To present a new paradigm in polymer design centered on modulating noncovalent interactions, specifically hydrogen bonds.
• To showcase advances in fabricating H-bond-mediated polymers (HBMPs) with enhanced properties and sustainability.
• To demonstrate the potential of HBMPs to overcome the strength-toughness trade-off in polymeric materials.

Main Methods:

• Fabrication of H-bond-mediated polymers (HBMPs) through meticulous tuning of interchain/intersegment hydrogen bonding.
• Rational design of covalent polymer chain and network structures in conjunction with noncovalent interactions.
• Exploration of multivalence cooperativity and dynamic nature of H-bonding interactions for property optimization.

Main Results:

• HBMPs fabricated using commodity polymers exhibit unprecedented properties and sustainability.
• Synergy of H-bonding interactions in HBMPs reconciles the strength-toughness trade-off, achieving superhigh strength and toughness.
• Optimized HBMPs demonstrate covalent crosslinking effects, providing thermoset stability with thermoplastic recyclability.

Conclusions:

• H-bond-mediated assembly is an effective strategy for creating novel polymers with superior performance.
• The concept of HBMPs offers a pathway to highly durable, yet recyclable, advanced materials.
• This approach can be extended to other noncovalent bond-mediated systems, broadening the scope of functional and sustainable polymer innovation.