Perfluorocyclobutyl-based polymers for functional materials

Zhou, Junfeng; Tao, Yangqing; Chen, Xiaoyao; Fang, Liang; Wang, Yuanqiang; Sun, Jing; Fang, Qiang

doi:10.1039/c9qm00001a

Cited by 55 publications

(41 citation statements)

References 121 publications

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“…Perfluorocyclobutyl (PFCB) aryl ether polymer is a novel fluorinated polymer, first developed in 1993 by Babb 27 of Dow company. The process of polymer formation is a unique reaction, by which the trifluoroethylene becomes hexafluorocylbutyl in the covalent linkage by cyclization 28 . Such cyclization reaction is very suitable to the vulcanization reaction for no by‐products and no catalysts (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

Preparation of fluorosilicone rubber containing perfluorocyclobutyl aryl ether

Wang

Yuan

Zhao

et al. 2020

Polymers for Advanced Techs

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A new curing system for high temperature vulcanized fluorosilicone rubber was studied by thermal cycloaddition reaction of trifluoroethylene aryl ether (TFVE). Fluorosilicone rubber containing perfluorocyclobutyl aryl ether (Si‐PFCB) was prepared by using the polysiloxane containing trifluorovinyl aryl ether (Si‐TFVE) as base gum. The basic formula of vulcanized rubber was determined as: 100 parts Si‐TFVE (0.10%TFVE, mol), 50 parts fumed silica. The curing process is as follows: the primary curing process is 180°C, 25 minutes; the post‐curing process is 190°C, 3 hours. It is found that the mechanical properties (the tensile strength is 6.9 MPa, the tearing strength is 35.3 KN/m and the elongation at break is 1685%), thermal property (Tg: −120 ± 5°C) and heat resistance (T5: 450 ± 5°C) of Si‐PFCB are comparable to ordinary high‐temperature vulcanized silicone rubber, while the new curing system has the advantage of no vulcanizing agents and no by‐products.

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Section: Resultsmentioning

confidence: 99%

Preparation of fluorosilicone rubber containing perfluorocyclobutyl aryl ether

Wang

Yuan

Zhao

et al. 2020

Polymers for Advanced Techs

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“…In this review, we aim to concisely highlight both PFCBs and ODA-based materials as two useful classes of aromatic and fluoroalicyclic polymers. Although these polymers have been widely discussed in the literature, the majority of the past and current reviews have focused broadly on the synthesis, properties, and industrial uses on each individual polymer [ 12 , 16 , 50 , 59 ]. Herein, we not only present in one review the synthetic routes toward production of new PFCB polymers (i.e., those containing large polycyclic aromatic hydrocarbons) and high carbon yielding ODA-based materials, but also emphasis on their preparation via ring formation, which leads to a remarkably unique combination of processability and performance properties.…”

Section: Introductionmentioning

confidence: 99%

Ring-Forming Polymerization toward Perfluorocyclobutyl and Ortho-Diynylarene-Derived Materials: From Synthesis to Practical Applications

et al. 2021

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Many desirable characteristics of polymers arise from the method of polymerization and structural features of their repeat units, which typically are responsible for the polymer’s performance at the cost of processability. While linear alternatives are popular, polymers composed of cyclic repeat units across their backbones have generally been shown to exhibit higher optical transparency, lower water absorption, and higher glass transition temperatures. These specifically include polymers built with either substituted alicyclic structures or aromatic rings, or both. In this review article, we highlight two useful ring-forming polymer groups, perfluorocyclobutyl (PFCB) aryl ether polymers and ortho-diynylarene- (ODA) based thermosets, both demonstrating outstanding thermal stability, chemical resistance, mechanical integrity, and improved processability. Different synthetic routes (with emphasis on ring-forming polymerization) and properties for these polymers are discussed, followed by their relevant applications in a wide range of aspects.

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“…The rapid development of telecommunication techniques has witnessed the start of fifth-generation (5G) era in recent years [ 1 ]. One of the most extraordinary features of 5G communication is the high-frequency transmission of signals in hardware [ 2 ]. This characteristic makes it very important to achieve low-loss and low-delay signals transmission [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Electrospun Fluoro-Containing Poly(imide-benzoxazole) Nano-Fibrous Membranes with Low Dielectric Constants and High Thermal Stability

et al. 2021

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The rapid development of advanced high-frequency mobile communication techniques has advanced urgent requirements for polymer materials with high-temperature resistance and good dielectric properties, including low dielectric constants (low-Dk) and low dielectric dissipation factors (low-Df). The relatively poor dielectric properties of common polymer candidates, such as standard polyimides (PIs) greatly limited their application in high-frequency areas. In the current work, benzoxazole units were successfully incorporated into the molecular structures of the fluoro-containing PIs to afford the poly(imide-benzoxazole) (PIBO) nano-fibrous membranes (NFMs) via electrospinning fabrication. First, the PI NFMs were prepared by the electrospinning procedure from organo-soluble PI resins derived from 2,2’-bis(3,4-dicarboxy-phenyl)hexafluoropropane dianhydride (6FDA) and aromatic diamines containing ortho-hydroxy-substituted benzamide units, including 2,2-bis[3-(4-aminobenzamide)-4-hydroxylphenyl]hexafluoropropane (p6FAHP) and 2,2-bis[3-(3-aminobenzamide)-4-hydroxyphenyl]hexafluoropropane (m6FAHP). Then, the PI NFMs were thermally dehydrated at 350 °C in nitrogen to afford the PIBO NFMs. The average fiber diameters (dav) for the PIBO NFMs were 1225 nm for PIBO-1 derived from PI-1 (6FDA-p6FAHP) precursor and 816 nm for PIBO-2 derived from PI-2 (6FDA-m6FAHP). The derived PIBO NFMs showed good thermal stability with the glass transition temperatures (Tgs) over 310 °C and the 5% weight loss temperatures (T5%) higher than 500 °C in nitrogen. The PIBO NFMs showed low dielectric features with the Dk value of 1.64 for PIBO-1 and 1.82 for PIBO-2 at the frequency of 1 MHz, respectively. The Df values were in the range of 0.010~0.018 for the PIBO NFMs.

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Perfluorocyclobutyl-based polymers for functional materials

Abstract: Perfluorocyclobutyl (PFCB)-based polymers exhibit attractive properties, including good thermal and chemical stability, high hydrophobicity and transparency, as well as good insulating properties.

Cited by 55 publications

References 121 publications

Preparation of fluorosilicone rubber containing perfluorocyclobutyl aryl ether

Preparation of fluorosilicone rubber containing perfluorocyclobutyl aryl ether

Ring-Forming Polymerization toward Perfluorocyclobutyl and Ortho-Diynylarene-Derived Materials: From Synthesis to Practical Applications

Preparation and Characterization of Electrospun Fluoro-Containing Poly(imide-benzoxazole) Nano-Fibrous Membranes with Low Dielectric Constants and High Thermal Stability

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