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Study on the adhesion of PTFE/PI composite films by interlocking synergistic effects

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Published/Copyright: January 31, 2024
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Journal of Polymer Engineering
From the journal Journal of Polymer Engineering Volume 44 Issue 3

Abstract

Composite films of polytetrafluoroethylene (PTFE) and polyimide (PI) combine the advantages of both materials like excellent inertness to chemicals and thermal stability, which provide great potential in applications under harsh environments. However, strong adhesion between PTFE and PI layers still remains a big challenge. In this study, fluorinated ethylene propylene (FEP) as an intermediate layer was found to significantly enhance the adhesion of PTFE films to PI film, with peel strength up to 350 N/m in the manufactured direction comparing to the value of 0 for PTFE/PI composite film without FEP. It’s superior to that of commercially available products (25 N/m) under the same test conditions. The improved performance is attributed to the formation of interlocks of molecules at the interfaces between the PTFE and FEP layers, and FEP and PI layers as observed in the images obtained by atomic force microscope (AFM) and scanning electron microscopy (SEM).

Keywords: polytetrafluoroethylene; polyimide; fluorinated ethylene propylene; adhesion; interlock; peel strength
Corresponding authors: Chunhai Chen and Dandan Li, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China, E-mail: (C. Chen), (D. Li)

Funding source: Shenzhen Science and Technology Program

Award Identifier / Grant number: KQTD20200820145821019

Funding source: Fundamental Research Funds for the Central Universities

Award Identifier / Grant number: 2232023D-23

  1. Research ethics: Not applicable.

  2. Author contributions: The manuscript was accomplished mainly by the first author and corresponding authors. All authors have given approval to the final version of the manuscript.

  3. Competing interests: The authors declare no competing financial interests.

  4. Research funding: This work was supported by Shenzhen Science and Technology Program (no. KQTD20200820145821019), the Fundamental Research Funds for the Central Universities (no. 2232023D-23).

  5. Data availability: Not applicable.

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Supplementary Material

This article contains supplementary material (https://doi.org/10.1515/polyeng-2023-0238).

Received: 2023-10-20
Accepted: 2024-01-08
Published Online: 2024-01-31
Published in Print: 2024-03-25

© 2024 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/polyeng-2023-0238
Keywords for this article
polytetrafluoroethylene; polyimide; fluorinated ethylene propylene; adhesion; interlock; peel strength

Articles in the same Issue

  1. Frontmatter
  2. Material Properties
  3. Effect of titanium diboride on the rheological characteristics of silica-based polyethylene glycol shear thickening fluid
  4. Influence of different dimensional nanoparticles on the properties of poly(β-hydroxybutyrate-co-valerate) nanocomposites
  5. Preparation and Assembly
  6. Multifunctional hydrogels for wound healing
  7. Stiff, strong, and tear-resistant physical hydrogels with widely tunable toughness by post-treatments
  8. Study on the adhesion of PTFE/PI composite films by interlocking synergistic effects
  9. Physically cross-linked scaffold composed of hydroxyapatite-chitosan-alginate-polyamide has potential to trigger bone regeneration in craniofacial defect
  10. Engineering and Processing
  11. Influence of CNTs on the gradient phase structure formed by the layered resin structure used to model the interlaminar region of interleaved FRPs
  12. Innovative reactor design for the preparation of polymer electrolyte membranes for vanadium flow batteries from preirradiation induced graft copolymerization of acrylic acid and AMPS on PVDF
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