Perfluorocyclobutyl-containing transparent polyimides with low dielectric constant and low dielectric loss,Polymer Chemistry

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Perfluorocyclobutyl-containing transparent polyimides with low dielectric constant and low dielectric loss
Polymer Chemistry ( IF 4.1 ) Pub Date : 2022-06-21 , DOI: 10.1039/d2py00550f
Weifeng Peng ₁ , Huanyu Lei ₁ , Luhao Qiu ₁ , Feng Bao ₁ , Mingjun Huang _{1,

2}

Affiliation

Polymers with low dielectric permittivity and dielectric loss are essential for the microelectrics and wireless communication industries. The perfluorocyclobutyl (PFCB) aryl ether group has been proven to afford polymer materials with a high fluorine content and large free volume, resulting in many attractive properties, e.g., good thermal and chemical stability, high hydrophobicity, transparency and low dielectric permittivity. Herein, a series of PFCB-containing polyimides were designed and synthesized. The conformational isomers of the diamine monomer could be separated, providing an opportunity to explore the effects of the isomer conformations on the polyimide properties. All these PFCB-containing polyimides present relatively loose chain packings due to their strongly distorted chain conformations. The combined loose chain packing and high fluoro content afford these PFCB-containing polyimides excellent optical transparency and dielectric properties. In particular, dielectric permittivity and dielectric loss values as low as 2.50 and 0.0035 at high frequency (10 GHz) were obtained, enabling potential applications in the microelectronics industry.

中文翻译：

低介电常数和低介电损耗的含全氟环丁基的透明聚酰亚胺

具有低介电常数和介电损耗的聚合物对于微电子和无线通信行业至关重要。全氟环丁基 (PFCB) 芳基醚基团已被证明可以提供具有高氟含量和大自由体积的聚合物材料，从而产生许多吸引人的特性，例如、良好的热稳定性和化学稳定性、高疏水性、透明度和低介电常数。在此，设计并合成了一系列含PFCB的聚酰亚胺。可以分离二胺单体的构象异构体，为探索异构体构象对聚酰亚胺性能的影响提供了机会。所有这些含 PFCB 的聚酰亚胺由于其链构象强烈扭曲而呈现相对松散的链堆积。松散链堆积和高氟含量的结合使这些含 PFCB 的聚酰亚胺具有出色的光学透明度和介电性能。特别是，在高频（10 GHz）下获得了低至 2.50 和 0.0035 的介电常数和介电损耗值，在微电子行业具有潜在的应用潜力。

更新日期：2022-06-21

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