A Facile Strategy for Intrinsic Low-<italic style="font-style: italic">D</italic><sub>k</sub> and Low-<italic style="font-style: italic">D</italic><sub>f</sub> Polyimides Enabled by Spirobifluorene Groups

Wan-Yi Tan; Ling-Feng Jian; Wei-Peng Chen; Yong-Wen Zhang; Xiao-Chuang Lu; Wan-Jun Huang; Ji-Sheng Zhang; Jing-Wu Wu; Jun-Li Feng; Yi-Dong Liu; Ting-Ting Cui; Yong-Gang Min

doi:10.1007/s10118-022-2824-z

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A Facile Strategy for Intrinsic Low-D_k and Low-D_f Polyimides Enabled by Spirobifluorene Groups

RESEARCH ARTICLE | Updated：2023-01-06

- A Facile Strategy for Intrinsic Low-D_k and Low-D_f Polyimides Enabled by Spirobifluorene Groups
- Chinese Journal of Polymer Science Vol. 41, Issue 2, Pages: 288-296(2023)
- Affiliations：
  
  a.Guangdong University of Technology (GDUT), Guangzhou 510006, China
  b.Huimai Materials Technology (Guangdong) Co., Ltd., Foshan 528200, China
  c.Shenzhen Customs Industrial Product Inspection Technology Center, Shenzhen 518026, China
- Author bio：
  
  ydliu@gdut.edu.cn (Y.D.L.)
  cuitt@gdut.edu.cn (T.T.C.)
  ygmin@gdut.edu.cn (Y.G.M.)
- Funds：
- DOI：10.1007/s10118-022-2824-z
  CLC：
- Received：07 April 2022，
  
  Revised：2022-5-30，
  
  Accepted：07 June 2022，
  
  Online First：06 September 2022，
  
  Published：01 February 2023
- Accepted：
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Tan, W. Y.; Jian, L. F.; Chen, W. P.; Zhang, Y, W.; Lu, X. C.; Huang, W. J.; Zhang, J. S.; Wu, J. W.; Feng, J. L.; Liu, Y. D.; Cui, T. T.; Min, Y. G. A facile strategy for intrinsic low-D_k and low-D_f polyimides enabled by spirobifluorene groups. Chinese J. Polym. Sci. 2023, 41, 288–296 DOI: 10.1007/s10118-022-2824-z.

Wan-Yi Tan, Ling-Feng Jian, Wei-Peng Chen, et al. A Facile Strategy for Intrinsic Low-D_k and Low-D_f Polyimides Enabled by Spirobifluorene Groups[J]. Chinese Journal of Polymer Science, 2023, 41(2): 288-296. DOI: 10.1007/s10118-022-2824-z.
Tan, W. Y.; Jian, L. F.; Chen, W. P.; Zhang, Y, W.; Lu, X. C.; Huang, W. J.; Zhang, J. S.; Wu, J. W.; Feng, J. L.; Liu, Y. D.; Cui, T. T.; Min, Y. G. A facile strategy for intrinsic low-D_k and low-D_f polyimides enabled by spirobifluorene groups. Chinese J. Polym. Sci. 2023, 41, 288–296 DOI: 10.1007/s10118-022-2824-z. DOI：

Wan-Yi Tan, Ling-Feng Jian, Wei-Peng Chen, et al. A Facile Strategy for Intrinsic Low-D_k and Low-D_f Polyimides Enabled by Spirobifluorene Groups[J]. Chinese Journal of Polymer Science, 2023, 41(2): 288-296. DOI: 10.1007/s10118-022-2824-z. DOI：

摘要

A facile and effective strategy to afford low

MPIs with less fluoric groups and nonporous structure

through incorporating rigid and large sterically hindered spirobifluorene groups into the main chain.

Abstract

Modified polyimides (MPIs) show great potential towards 5G communication applications

due to its excellent thermal stability

mechanical property and chemical stability as compared to most of polymers. Introducing fluoride groups or porous structure is favorable to ultra-low dielectric constant (

) and dielectric loss (

). However

the cost of the fluorinated MPIs is high and their synthetic processes are complicated

and porous MPIs suffer poor mechanical properties. Also

increasing the fraction of free volume is a very effective way to lower

through introducing more ultra-low-

air component. However

most of this kind of MPIs lag far behind the fluorinated MPIs and the porous MPIs in terms of ultra-low

hindering the application of MPIs in high-speed communication devices. Thus

it is highly desirable to develop intrinsic ultra-low-

MPIs at high frequency with less fluoric groups and nonporous structure. Herein

we introduce a facile and effective strategy to lower

and

through introducing rigid and large sterically hindered aromatic groups into MPIs. On the one hand

their large steric hindrance effect leads to low

by increasing intrinsic free volume. On the other hand

the resulting highly stiff polymer chain and strong intermolecular interaction are favorable to reduce

by inhibiting dipole orientations. Based on this strategy

the spirobifluorene groups are preferred. The as-prepared MPIs show excellent dielectric performance with low

of 2.74–2.76 and low

of 0.00599 at 10 GHz

to some extent

exceeding the multiple fluorinated MPI with

of 2.67/0.00663 at 10 GHz.

关键词

Keywords

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⁰

A Facile Strategy for Intrinsic Low-Dk and Low-Df Polyimides Enabled by Spirobifluorene Groups

DOI：10.1007/s10118-022-2824-z

摘要

Abstract

关键词

Keywords

references

A Facile Strategy for Intrinsic Low-D_k and Low-D_f Polyimides Enabled by Spirobifluorene Groups