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Multifunctional Acrylic Polymers with Enhanced Adhesive Property Serving as Excellent Edge Encapsulant for Stable

Seunglok Lee1, Jeewon Park1, Hayoung Ma1

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Researchers developed new acrylic adhesive polymers (Ads) with tunable pendant groups. These Ads demonstrate excellent adhesion and serve as effective encapsulants, enhancing stability in optoelectronic devices.

Keywords:
acrylic polymersadhesivesencapsulationsinterfacial adhesionsmultifunctionalitiesoptoelectronicspendant groups

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Adhesion Science

Background:

  • Pendant groups in acrylic adhesive polymers (Ads) significantly impact adhesive, cohesive, and encapsulant properties.
  • Limited systematic studies exist on the influence of pendant group length and bulkiness on Ads performance.
  • No prior reports detail the simultaneous application of Ads as interfacial adhesion promoters and encapsulation materials.

Purpose of the Study:

  • To systematically investigate the effect of pendant group length and bulkiness on acrylic adhesive polymers (Ads).
  • To develop multifunctional methacrylic polymers for simultaneous use as adhesion promoters and encapsulants.
  • To establish structure-adhesion-surface relationships for advanced adhesive and encapsulant design.

Main Methods:

  • Synthesis of a series of multifunctional methacrylic polymers (R-co-Ads) with varying pendant groups (C1-C6, iC4, 2EH).
  • Evaluation of adhesion properties including transparency, adhesion strength, and cure speed.
  • Application of the optimized polymer (C1-co-Ad) for encapsulating optoelectronic devices (e.g., perovskite solar cells).

Main Results:

  • R-co-Ads exhibited high transparency, strong adhesion to diverse surfaces, and rapid curing.
  • C1-co-Ad demonstrated superior adhesion performance (4B cross-cut index, 1.56 MPa shear bonding strength).
  • C1-co-Ad effectively encapsulated optoelectronic devices, improving stability against ambient air.

Conclusions:

  • The study successfully established structure-adhesion-surface relationships for acrylic adhesive polymers.
  • The developed R-co-Ads are promising multifunctional materials for advanced adhesives and encapsulants.
  • C1-co-Ad shows significant potential for enhancing the stability and performance of optoelectronic devices.