<i>In situ</i> catalyzed and reinforced high‐temperature flexible crosslinked ZnO nano‐whisker/polyarylene ether nitriles composite dielectric films

Yang, Ruiqi; Xiao, Qian; Wei, Renbo; Liu, Xiaobo

doi:10.1002/pc.24272

Cited by 13 publications

(8 citation statements)

References 44 publications

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“…According to the previous result, the thermal-induced self-crosslinking reaction of PEN cannot take place until the temperature is higher than 280 °C. − As a result, the physical property of TR-PEN200 is similar to that of PEN. This can be confirmed by the FTIR spectrum of TR-PEN200, from which the absorption band of neither the phthalocyanine ring nor the triazine ring can be observed (Figure a). , In addition, according to eq S1, the gel fraction of TR-PEN200 is 0% (Figure f), suggesting an un-crosslinked system of TR-PEN200.…”

Section: Resultsmentioning

confidence: 85%

“…33,37 TR-PEN320 further self-crosslinked, yielding TR-PEN350 when cured at 350 °C for 5 h. At this temperature, the cyanine from the side-chain of PEN takes part in the reaction, which results in the triazine ring as the crosslinks. 39 PEN was prepared through condensation polymerization and then terminated with phthalonitrile (Scheme S1). The FTIR spectrum of the prepared PEN is shown in Figure 2a.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Then, TR-PEN200 was cured at 240, 280, and 320 °C each for 5 h to form TR-PEN320. During this stage, the phthalonitriles at the end of PEN undergo the thermal-induced self-crosslinking reaction, forming phthalocyanine rings as the crosslinks. , TR-PEN320 further self-crosslinked, yielding TR-PEN350 when cured at 350 °C for 5 h. At this temperature, the cyanine from the side-chain of PEN takes part in the reaction, which results in the triazine ring as the crosslinks …”

Section: Resultsmentioning

confidence: 99%

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Controllable Fabrication of Poly(Arylene Ether Nitrile) Dielectrics for Thermal-Resistant Film Capacitors

You

Liu

et al. 2019

Macromolecules

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High-temperature-resistant dielectric films, the heart of energy storage components in film capacitors, are key elements to ensure that the capacitors operate properly in harsh environments. Herein, a kind of flexible thermal-resistant poly(arylene ether nitrile) (TR-PEN) dielectric film with controllable high-temperature resistance is fabricated through post self-crosslinking of PEN at different temperatures for different times. The dielectric films can present extremely high thermal stability (T g > 370 °C), a long service life at 300 °C (4.5 × 104 min, 95 wt % of the residual weight), and a low temperature coefficient of dielectric constant from 50 to 300 °C (<5 × 10–4 °C–1). The retention of the energy density of TR-PEN350 at 300 °C is higher than 80% compared with that at room temperature. These results indicate that the TR-PEN films can be used over a long term as capacitor films at temperatures up to 300 °C. Besides, the simple and controllable fabrication technique for the TR-PEN can be easily industrialized.

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Section: Resultsmentioning

confidence: 85%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Controllable Fabrication of Poly(Arylene Ether Nitrile) Dielectrics for Thermal-Resistant Film Capacitors

You

Liu

et al. 2019

Macromolecules

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“…This is mainly because PEN-g-BN hybrids are a cross-linked system. As filler content increases, crosslinking density of the PEN-g-BN hybrids increases and the number of polar cyano groups decreases, which leads to a decrease in the dielectric constant [39]. The dielectric loss of PEN-g-BN hybrids is similar to that of their dielectric constant.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Enhanced Thermal Conductivity of Boron Nitride and Polyarylene Ether Nitrile Hybrids

Xiao

Wei

et al. 2019

Polymers

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Excellent thermal resistance and thermal conductivity are preconditions of materials to be used at elevated temperatures. Herein, boron nitride and polyarylene ether nitrile hybrids (PEN-g-BN) with excellent thermal resistance and thermal conductivity are fabricated. Phthalonitrile-modified BN (BN-CN) is prepared by reacting hydroxylated BN with isophorone diisocyanate (IPDI) and 3-aminophxylphthalonitrile (3-APN), and then characterized by FT-IR, UV-Vis, and X-ray photoelectron spectroscopy (XPS). The obtained BN-CN is introduced to a phthalonitrile end-capped PEN (PEN-Ph) matrix to prepare BN-CN/PEN composites. After curing at 340 °C for 4 h, PEN-g-BN hybrids are fabricated by a self-crosslinking reaction of cyano groups (-CN) from BN-CN and PEN-Ph. The fabricated PEN-g-BN hybrids are confirmed through FT-IR, UV-Vis, SEM and gel content measurements. The PEN-g-BN hybrids demonstrate excellent thermal resistance with their glass transition temperature (Tg) and decomposition temperatures (Td) being higher than 235 °C and 530 °C, respectively. Additionally, the thermal conductivity of the prepared PEN-g-BN hybrids is up to 0.74 W/(m·k), intensifying competitiveness of PEN-g-BN hybrids for applications at elevated temperatures.

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“…As a high-performance thermoplastic polymer, PEN-ph possesses outstanding properties including high thermal stability, excellent mechanical properties as well as chemical resistance [ 28 , 29 , 30 ]. Most importantly, the phthalonitrile is capped at the ends of PEN-ph can form cross-linked three-dimensional network structure at high temperature, thus further improving above-mentioned properties.…”

Section: Resultsmentioning

confidence: 99%

Flexible Ultrahigh-Temperature Polymer-Based Dielectrics with High Permittivity for Film Capacitor Applications

Zheng

Tian

et al. 2017

Polymers

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Abstract:In this report, flexible cross-linked polyarylene ether nitrile/functionalized barium titanate(CPEN/F-BaTiO 3 ) dielectrics films with high permittivitywere prepared and characterized. The effects of both the F-BaTiO 3 and matrix curing on the mechanical, thermal and dielectric properties of the CPEN/F-BaTiO 3 dielectric films were investigated in detail. Compared to pristine BaTiO 3 , the surface modified BaTiO 3 particles effectively improved their dispersibility and interfacial adhesion in the polymer matrix. Moreover, the introduction of F-BaTiO 3 particles enhanced dielectric properties of the composites, with a relatively high permittivity of 15.2 and a quite low loss tangent of 0.022 (1 kHz) when particle contents of 40 wt % were utilized. In addition, the cyano (-CN) groups of functional layer also can serve as potential sites for cross-linking with polyarylene ether nitrile terminated phthalonitrile (PEN-Ph) matrix and make it transform from thermoplastic to thermosetting. Comparing with the pure PEN-ph film, the latter results indicated that the formation of cross-linked network in the polymer-based system resulted in increased tensile strength by~67%, improved glass transition temperature (T g ) by~190 • C. More importantly, the CPEN/F-BaTiO 3 composite films filled with 30 wt % F-BaTiO 3 particles showed greater energy density by nearly 190% when compared to pure CPEN film. These findings enable broader applications of PEN-based composites in high-performance electronics and energy storage devices materials used at high temperature.

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In situ catalyzed and reinforced high‐temperature flexible crosslinked ZnO nano‐whisker/polyarylene ether nitriles composite dielectric films

Cited by 13 publications

References 44 publications

Controllable Fabrication of Poly(Arylene Ether Nitrile) Dielectrics for Thermal-Resistant Film Capacitors

Controllable Fabrication of Poly(Arylene Ether Nitrile) Dielectrics for Thermal-Resistant Film Capacitors

Fabrication and Enhanced Thermal Conductivity of Boron Nitride and Polyarylene Ether Nitrile Hybrids

Flexible Ultrahigh-Temperature Polymer-Based Dielectrics with High Permittivity for Film Capacitor Applications

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