A novel single-component composite based on phthalonitrile end-capped polyarylene ether nitrile: crystallization and crosslinking

Tong, Lifen; Jia, Kun; Liu, Xiaobo

doi:10.1007/s10965-015-0736-0

Cited by 11 publications

(8 citation statements)

References 39 publications

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“…It is obviously observed that there is a steamed‐bun‐like peak in the range of 10–30° both in the samples of blending PEN‐Ph film and pure HMW PEN‐Ph film, which is attributed to the amorphous background resin. For the blending PEN‐Ph film [Figure (a)], there are three diffraction peaks at 17.0, 18.2, and 23.3°, indicating that the film with LMW PEN‐Ph loading does have crystallization properties . These XRD analysis results are consistent with the DSC analysis results.…”

Section: Resultssupporting

confidence: 78%

“…Thus, as the LMW PEN‐Ph content increases, the crystalline degree of PEN‐Ph film which is reflected by the melting enthalpy increases, and the values of the melting enthalpy are listed in Table . During the process of crystal melting, the lamellae will be thickening, perfecting, and recrystallizing, so that the sample possess a broad melting peak as well as long melting range . On the one hand, at the temperature of 280 °C, the crosslinking reaction hardly occurs; thereby, the LMW PEN‐Ph is acting as plasticizer.…”

Section: Resultsmentioning

confidence: 99%

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Improving the thermal and mechanical properties of poly(arylene ether nitrile) films through blending high‐ and low‐molecular‐weight polymers

Tong

Yang

Lei

et al. 2019

J of Applied Polymer Sci

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In present work, novel phthalonitrile end-capping poly(arylene ether nitrile)-phenyl (PEN-Ph) films with excellent mechanical properties as well as high glass transition temperature were prepared through blending high-molecular-weight PEN-Ph (HMW PEN-Ph) and low-molecular-weight PEN-Ph (LMW PEN-Ph). Then, the thermal and mechanical properties of the samples with different mass ratio of HMW PEN-Ph and LMW PEN-Ph were studied, and the effect of heat-treatment temperature on the performance of films was also investigated. The analysis results indicate that the crosslinking density as well as film formation can be controlled by adjusting the mass ratio of HMW PEN-Ph to LMW PEN-Ph. Besides, when the mass ratio of HMW PEN-Ph to LMW PEN-Ph is 5:2, the film treated at 340 C possesses the best thermal and mechanical properties, with T g of 218.9 C and tensile strength of 104.8 MPa, increased by 10.9 C and 16.6 MPa than pure HMW PEN-Ph film, respectively. Thus, the presence of LMW PEN-Ph makes the thermal and mechanical properties of the films improve dramatically, providing the possibility for the application in the electronics and hightemperature resistant fields.

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Section: Resultssupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Improving the thermal and mechanical properties of poly(arylene ether nitrile) films through blending high‐ and low‐molecular‐weight polymers

Tong

Yang

Lei

et al. 2019

J of Applied Polymer Sci

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“…Because of the certain regular structure of the molecular chain and the phthalonitrile groups at the end of the molecular chain, PEN-Ph possesses crystallization properties combined with crosslinking properties [14,15]. In this work, the crystallization behavior and crosslinking behavior were studied.…”

Section: Introductionmentioning

confidence: 99%

Post Self-Crosslinking of Phthalonitrile-Terminated Polyarylene Ether Nitrile Crystals

2018

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A novel phthalonitrile-terminated polyaryl ether nitrile (PEN-Ph) was synthesized and characterized. The crystallization behavior coexisting with the crosslinking behavior in the PEN-Ph system was confirmed by rheological measurements. DSC was applied to study the crystallization kinetics and crosslinking reaction kinetics. Through the Avrami equation modified by Jeziorny, the nonisothermal crystallization kinetics were analyzed, and the Avrami exponent of about 2.2 was obtained. The analysis results of more intuitive polaring optical microscopy (POM) and SEM indicated that the shape of the crystals is similar to spherical. Moreover, the activation energy of the crystallization behavior and crosslinking behavior were obtained by the Kissinger method, and the values were about 152.7 kJ·mol −1 and 174.8 kJ·mol −1 , respectively. This suggests that the activation energy of the crystallization behavior is lower than that of the crosslinking behavior, indicating that the crystallization behavior is more likely to occur than the crosslinking behavior and the crystals of PEN-Ph can be self-crosslinked to form single-polymer composites.

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“…The most important property of it is the self‐crosslinking. Based on these properties, Tong and her co‐workers have fabricated the single component cross‐linked composite films , whose T g was improved by a large margin. However, the improvement of T g and thermal resistance were at a sacrifice of flexibility, dielectric constant as well as tensile strength .…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2016

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Zinc oxide nano-whiskers (ZnO-nws) with the aspect ratio of about 30 are prepared via hydrothermal method and characterized by XRD and SEM. Then, the ZnO-nws are doped into polyarylene ether nitriles terminated with phthalonitrile (PEN-Ph) to fabricate the ZnO-nws/PEN-Ph crosslinked composite films. The crosslinking density, thermo-stability, dielectric property, microstructure and mechanical property are investigated in detail.According to the DSC test, the ZnO-nws can be served as catalyst for the crosslinking reaction of phthalonitrile. Under the same condition, the crosslinking density of the composites is determined by the weight content of ZnO-nws, and is 5.45 3 10 22 mol/cm 3 when 4 wt% of ZnO-nws is incorporated. The TGA and DSC results show that the ZnO-nws/PEN-Ph crosslinked composite films are endowed with excellent thermo-stability and operating temperature. With the ZnO-nws incorporated, the dielectric constant of the composite is improved from 3.4 to 6.2 at 1 kHz when the ZnO-nws weight content is 16 wt%. The mechanical property test shows that the tensile strength increases with the increasing weight content of ZnO-nws. The cross-sectional micromorphology of the composites is determined by SEM and it shows that the ZnO-nws is uniformly dispersed in PEN-Ph matrix. These results indicate that the ZnO-nws act both as catalyst and reinforce element for PEN-Ph to obtain high performance crosslinked composite films. POLYM. COMPOS., 00:000-000, 2016.

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A novel single-component composite based on phthalonitrile end-capped polyarylene ether nitrile: crystallization and crosslinking

Cited by 11 publications

References 39 publications

Improving the thermal and mechanical properties of poly(arylene ether nitrile) films through blending high‐ and low‐molecular‐weight polymers

Improving the thermal and mechanical properties of poly(arylene ether nitrile) films through blending high‐ and low‐molecular‐weight polymers

Post Self-Crosslinking of Phthalonitrile-Terminated Polyarylene Ether Nitrile Crystals

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

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