Synthesis and Properties of High Performance Functional Polyimides Containing Rigid Nonplanar Conjugated Fluorene Moieties

Liu, Yiwu; Tang, Lishuang; Qu, Lunjun; Liu, Siwei; Chi, Zhenguo; Zhang, Yi; Xu, Jiarui

doi:10.1007/s10118-019-2225-0

Cited by 50 publications

(24 citation statements)

References 49 publications

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“…38). 259,260 In addition, these polyimides showed light color (even colorlessness in one case) and transparency as well as electrical bistability characteristics (ON/OFF ratio as high as 10 7 ; working voltage as low as 1.5 V). The excellent thermal stability and solubility allowed them to undergo the high-temperature process (over 400 1C) in the preparation of photoelectric devices (such as PVD and PECVD) or the highly efficient, continuous roll-to-roll process.…”

Section: Intrinsic Low-k Polyimide Materialsmentioning

confidence: 99%

“…Recently, a highly efficient design strategy to fabricate highperformance intrinsic low-k polyimides has been developed by Zhang and Xu et al by the use of propeller-like structures (such as triphenylamine, triphenylmethane, and tristyrene units) in order to form a series of novel functional diamine monomers with rigid nonplanar large conjugated structures. [255][256][257][258][259][260][261] By regulating the chemical structures and aggregation structures of the polymers at the molecular level, low-and even ultralow-k polyimide films with excellent comprehensive properties can be obtained ( Fig. 34).…”

Section: Intrinsic Low-k Polyimide Materialsmentioning

confidence: 99%

“…34). 260 Liu et al designed and synthesized novel, simple, and efficient diamine (TriPEDA and TPEDA)-containing rigid nonplanar conjugated triphenylethylene and TPE moieties through the Wittig-Horner and Suzuki coupling reactions. 255,256 A series of high-performance functional polyimides were consequently prepared by the dipolymerization of TriPEDA/TPEDA and four dianhydrides ( Fig.…”

Section: Intrinsic Low-k Polyimide Materialsmentioning

confidence: 99%

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Advanced functional polymer materials

Wang¹,

Amin²,

An³

et al. 2020

Mater. Chem. Front.

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134

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Section: Intrinsic Low-k Polyimide Materialsmentioning

confidence: 99%

Section: Intrinsic Low-k Polyimide Materialsmentioning

confidence: 99%

Section: Intrinsic Low-k Polyimide Materialsmentioning

confidence: 99%

See 1 more Smart Citation

Advanced functional polymer materials

Wang¹,

Amin²,

An³

et al. 2020

Mater. Chem. Front.

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134

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“…Polymer materials based on polyimide (PI) are widely used in the design of modern spacecraft (SC). The combination of high strength, retained even after exposure to space radiation, high and low temperature stability, and UV irradiation makes it possible to consider PI as a promising material for creating elements of space technology with improved energy-mass characteristics [1,2]. Various thermoregulatory coatings, elements of screen-vacuum thermal insulation, and sun protection devices, etc.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of PI/POSS nanocomposite films based on track nuclear membranes and assessment of their resistance to oxygen plasma flow

Черкашина

Павленко

Носков

et al. 2021

Polymer

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This work presents, for the first time, data on the possibility of synthesizing polyimide nanocomposite films based on track nuclear membranes and organosiloxane (polyhedral oligomeric silsesquioxanes) POSS structures. The synthesis of the nanocomposite films was carried out by filling the tracks of a polyimide membrane with POSS structures under hydrothermal conditions in a high-pressure reactor. The surface and mechanical characteristics of the developed nanocomposite films were studied, and the results of their resistance to the flow of oxygen plasma are presented. It was found that the introduction of POSS structures significantly increased the resistance of polyimide to the flow of oxygen plasma. The PI/POSS composite exhibited an insignificant change in weight, the weight loss reached 0.92 ± 0.05 mg/cm 2 in 24 h after the start of the experiment, which is almost two orders of magnitude lower than that of the polyimide film.

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“…Decreasing the polarizability[3,18,19] and increasing the cross‐link density[20–22] can reduce the dielectric constant and loss. Adding organic peroxide initiators to produce low polarity functional groups, such as C─C and C─H bonds, decreases D k and dielectric loss ( D f ).…”

Section: Introductionmentioning

confidence: 99%

Different Organic Peroxides that Cure Low‐k 1,2‐PB/SBS/EPDM Composites for High‐Frequency Substrate

Mao

Wang

et al. 2020

Vinyl Additive Technology

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Since the advent of 5G network, polymeric low dielectric constant (low‐k) materials have been indispensable for high speed and stable signal transmission at microwave frequency. Herein, the low‐k composites of 1,2‐polybutadiene/styrene‐butadiene‐styrene triblock copolymer/ethylene‐propylene‐dicyclopentadiene (1,2‐PB/SBS/EPDM) were prepared with cured organic peroxide. Two structurally different organic peroxides, namely dicumyl peroxide (DCP) and bis(1‐(tert‐butylperoxy)‐1‐methylethyl)‐benzene (BIPB), were used as free‐radical initiators. The composites with highly efficient initiator—BIPB exhibited considerably enhanced conversion rate, thermal stability, and cross‐link density compared with the DCP system. Furthermore, the increased cross‐link density contributed to dielectric stability over a broad range of frequency (3‐15 GHz) and superior mechanical properties. The cross‐linked composites possessed the typical low polarity group of C─C single bond with suppressed dielectric constant (Dk) and loss (Df). Especially, the average Dk of 2.36 and average Df of 0.0054 were obtained for the composite containing 4 part‐by‐weight (pbw) BIPB. This work demonstrated that the 1,2‐PB/SBS/EPDM composite with 4 pbw BIPB is a good candidate for high‐frequency substrate materials.

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Synthesis and Properties of High Performance Functional Polyimides Containing Rigid Nonplanar Conjugated Fluorene Moieties

Cited by 50 publications

References 49 publications

Advanced functional polymer materials

Advanced functional polymer materials

Synthesis of PI/POSS nanocomposite films based on track nuclear membranes and assessment of their resistance to oxygen plasma flow

Different Organic Peroxides that Cure Low‐k 1,2‐PB/SBS/EPDM Composites for High‐Frequency Substrate

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