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Determination of Molar Masses of Polymers I01:24

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Fabrication of Large-area Free-standing Ultrathin Polymer Films
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Manipulation of polymer/polymer interface width from nonequilibrium deposition.

Wumin Yu1, Someswara R Peri, Bulent Akgun

  • 1Department of Polymer Science, The University of Akron, Akron, 170 University Avenue, Akron, Ohio 44325-3909, USA.

ACS Applied Materials & Interfaces
|April 9, 2013
PubMed
Summary

Adding a "swelling agent" during deposition controllably broadens polymer interfaces, significantly enhancing adhesion for robust multilayer films. This cost-effective strategy is ideal for scalable roll-to-roll manufacturing.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Surface Science

Background:

  • Robust polymer multilayer films are crucial for advanced applications like displays and electronics.
  • Achieving strong interfacial adhesion is key to the performance and durability of these films.
  • Current methods for interface modification may not be cost-effective or scalable.

Purpose of the Study:

  • To investigate a novel method for broadening polymer-polymer interfaces using a
  • swelling agent
  • during deposition.
  • To quantify the impact of interface broadening on interfacial adhesion.
  • To explore the scalability of this approach for industrial applications.

Main Methods:

  • Neutron reflectivity was used to measure interfacial width.
  • T-peel tests were employed to quantify interfacial adhesion.
  • Atomic Force Microscopy (AFM) was used to analyze fractured surface morphologies.

Main Results:

  • A
  • swelling agent
  • in the deposition solvent controllably broadened the interface between aromatic polyimide and triacetate cellulose (TAC).
  • Interfacial adhesion, measured by T-peel tests, increased by up to a factor of 7.
  • AFM analysis revealed that a broader interface formed an interconnected network, leading to enhanced adhesion.
  • Optimizing deposition temperature offered a smaller adhesion increase compared to the
  • swelling agent
  • method.

Conclusions:

  • The
  • swelling agent
  • strategy provides a controllable and effective method for enhancing polymer-polymer interfacial adhesion.
  • This approach leads to improved mechanical properties of multilayer polymer films.
  • The method is suitable for cost-effective, large-scale production using roll-to-roll processing.