Preparation of fluorinated poly(benzoxazole-<i>co</i>-imide) with low dielectric constants based on the thermal rearrangement reaction of <i>o</i>-hydroxy polyimides

Li, Hong; Li, Xiyan; Yu, Jiali; Li, Yadong; Wang, Zhigang; Bao, Feng; Zhu, Caizhen; Xu, Jian

doi:10.1039/d3tc04195f

Cited by 6 publications

References 43 publications

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Synchronous improvement in mechanical properties and dielectric performance of poly(silylene arylether arylacetylene) by introducing trifluoromethyl groups

Gong,

Lv,

Liu

et al. 2024

Journal of Polymer Science

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Poly(silylene arylether arylacetylene) (PSEA) resin is a promising material for preparing an advanced wave‐transparent composite because of excellent thermal stability and good dielectric properties. Herein, a novel poly(silylene arylether arylacetylene) resin with trifluoromethyl groups (PSEAF) was synthesized by Grignard coupling reaction, and the effects of the incorporation of trifluoromethyl groups on various properties of PSEAF resin and quartz fiber reinforced composites were investigated. Compared to PSEA, the PSEAF resin exhibits better solubility and processability, and lower apparent activation energy for curing reactions. After thermal curing reactions, the PSEAF resin converts to an amorphous crosslinked network with the temperature at 5% weight loss (Td5) around 470 °C. The cured PSEAF resin possesses improved mechanical properties and dielectric properties. The flexural strength arrives at 64.4 MPa, and the dielectric constant (ε) and dielectric loss (tanδ) at 30 MHz are 2.75 and 4.3 × 10−3, respectively. Besides, the quartz fiber reinforced PSEAF composite simultaneously shows ε of 3.3, theoretical wave transmittance |T|2 of 91.4% at 7 GHz, and flexural strength of 350 MPa.

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Synchronous improvement in mechanical properties and dielectric performance of poly(silylene arylether arylacetylene) by introducing trifluoromethyl groups

Gong,

Lv,

Liu

et al. 2024

Journal of Polymer Science

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Polyimide-based thermal rearranged (TR) membrane for highly efficient natural gas separation: A review

Cai,

Chen,

Wang

et al. 2025

Separation and Purification Technology

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The structure design of poly(ester imide)s with low dielectric loss and high mechanical properties

Zhang,

He,

2025

J. Mater. Chem. C

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Preparation of fluorinated poly(benzoxazole-co-imide) with low dielectric constants based on the thermal rearrangement reaction of o-hydroxy polyimides

Abstract: This paper proposes a new strategy to prepare PIs with excellent overall performance by combining various modifications such as triphenyl pyridine structure, long-chain anhydride, trifluoromethyl, and thermal rearrangement reaction.

Cited by 6 publications

References 43 publications

Synchronous improvement in mechanical properties and dielectric performance of poly(silylene arylether arylacetylene) by introducing trifluoromethyl groups

Synchronous improvement in mechanical properties and dielectric performance of poly(silylene arylether arylacetylene) by introducing trifluoromethyl groups

Polyimide-based thermal rearranged (TR) membrane for highly efficient natural gas separation: A review

The structure design of poly(ester imide)s with low dielectric loss and high mechanical properties

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