High-temperature polymers with record-high breakdown strength enabled by rationally designed chain-packing behavior in blends

Polymers with high dielectric breakdown strength (Eb) over a broad temperature range are vital for many applications. The presence of weak points, such as voids and free volume, severely limit the Eb of many high-temperature polymers. Here, we present a general strategy to reduce these weak points by exploiting interchain electrostatic forces in polymer blends. We show that the strong interchain electrostatic interaction between two high-temperature polymers in blends of polyimide (PI) with poly(ether imide) (PEI) yields an extended polymer chain conformation, resulting in dense chain packing and a corresponding decrease in weak spots in the polymers. This leads to a greater than 65% enhancement of Eb at room temperature and 35% enhancement at 200°C. In conjunction with results from blends of PI/poly(1,4-phenylene ether-sulfone) (PSU) and blends of PEI/PSU, we show that this previously unexplored molecular engineering strategy is efficient and straightforward in minimizing weak points in dielectric polymers.

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Work Title High-temperature polymers with record-high breakdown strength enabled by rationally designed chain-packing behavior in blends
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Open Access
Creators
  1. Qiyan Zhang
  2. Xin Chen
  3. Bing Zhang
  4. Tian Zhang
  5. Wengchang Lu
  6. Zhe Chen
  7. Ziyu Liu
  8. Seong H. Kim
  9. Brian Donovan
  10. Ronald J. Warzoha
  11. Enrique D. Gomez
  12. J. Bernholc
  13. Q. M. Zhang
License CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives)
Work Type Article
Publisher
  1. Matter
Publication Date May 26, 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1016/j.matt.2021.04.026
Deposited November 23, 2021

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  • Created
  • Added High-temperature_polymers_with_record-high_breakdown_strength_enabled_by_rationally_designed_chain-packing_behavior_in_blends.docx
  • Added Creator Qiyan Zhang
  • Added Creator Xin Chen
  • Added Creator Bing Zhang
  • Added Creator Tian Zhang
  • Added Creator Wengchang Lu
  • Added Creator Zhe Chen
  • Added Creator Ziyu Liu
  • Added Creator Seong H. Kim
  • Added Creator Brian Donovan
  • Added Creator Ronald J. Warzoha
  • Added Creator Enrique D. Gomez
  • Added Creator J. Bernholc
  • Added Creator Q. M. Zhang
  • Published
  • Updated
  • Updated