Polyarylene ether nitrile composites film with self-reinforcing effect by cross-linking and crystallization synergy

Self Cite

The synergistic effects of carbon fiber (CF) and polytetrafluoroethylene (PTFE) on the friction and wear behavior of polyarylene ether nitrile (PEN) under dry lubrication condition were studied. According to the scanning electron microscopy (SEM) on the composites' surface after wear, the wear mechanism of the composites under dry sliding condition was analyzed. The research results show that the addition of solid lubricants PTFE and carbon fibers to PEN helps to enhance the properties of friction and wear. The specific wear rate is decreased to 5.7 × 10−7 mm3/N m at a PTFE composition of 5 wt%, which is optimized by 33.4% more than PEN/CF composites. In addition, wear mechanisms are mainly abrasive wear, accompanied by adhesive wear and plowing of the friction ring.

Section: Introductionmentioning

confidence: 99%

Synergistic effects of carbon fiber and polytetrafluoroethylene on the friction and wear behavior of polyarylene ether nitrile under dry lubrication condition

Wang

Liu

et al. 2023

Self Cite

“…Poly (arylene ether nitrile) (PEN) is a kind of high‐performance special engineering plastic with a large number of rigid benzene rings and flexible ether bonds in the molecular main chain. Thus, PEN owns great properties like excellent heat resistance, chemical resistance and mechanical properties, which can be widely used in petrochemical, electronic equipment, aerospace, military weapons and other fields 1–13 . Due to its controllable structure and easy preparation, amorphous PEN can be used as matrix material in separation, adsorption, electromagnetic shielding and new energy fields 10,11,14–24 .…”

Section: Introductionmentioning

confidence: 99%

“…Thus, PEN owns great properties like excellent heat resistance, chemical resistance and mechanical properties, which can be widely used in petrochemical, electronic equipment, aerospace, military weapons and other fields. [1][2][3][4][5][6][7][8][9][10][11][12][13] Due to its controllable…”

mentioning

confidence: 99%

Effect of thermal stretching on properties of poly (arylene ether nitrile)/aramid staple fiber composites

et al. 2023

Self Cite

Semi‐crystalline poly (arylene ether nitrile) (PEN) with outstanding thermal stability and mechanical properties are expected to be used in structural materials. Increasing the crystallinity of PEN helps improve the processability of the materials as well as the thermal and mechanical properties of the products. In present work, the comprehensive properties of PEN composites are improved by the introduction of aramid staple fiber combined with hot stretching method. The effects of aramid fiber content and hot stretch multiplicity on the properties of the composite were investigated. The result shows that when the mass fraction of aramid fiber (AF) powder is 0.3% (PEN/AF3), the composites have the best overall performance, including thermal and mechanical properties. In addition, when the tensile ratio was 300% (PEN/AF3‐300), the properties of the samples are greatly improved, with the crystallinity increasing to 36.1%, the thermal decomposition temperature of 5% (Td5%) increasing by 10°C, and the tensile strength increasing to 195.40 MPa, which is 87.34% higher than that of the non‐thermal tensile composites. Therefore, this work provides a technical route for the preparation of high performance semi‐crystalline PEN composites, which is beneficial for the development of PEN applications.

“…Currently, polyarylene ether nitrile (PEN), as a special engineering plastic, has received much attention in the field of interlayer dielectrics. [8][9][10][11][12] The unique molecular structure provides a sea of advantages, such as high thermal stability, good mechanicals, and tunable dielectric properties via cross-linking or crystallization. [13][14][15][16] It is noteworthy that the nitrile groups on the PEN chain segments can not only undergo cross-linking reactions at a temperature to transform the linear structure into three-dimensional network, resulting in high T g and T 5% , 8,17,18 but also have good adhesion to many substances.…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10][11][12] The unique molecular structure provides a sea of advantages, such as high thermal stability, good mechanicals, and tunable dielectric properties via cross-linking or crystallization. [13][14][15][16] It is noteworthy that the nitrile groups on the PEN chain segments can not only undergo cross-linking reactions at a temperature to transform the linear structure into three-dimensional network, resulting in high T g and T 5% , 8,17,18 but also have good adhesion to many substances. 19,20 Nevertheless, the dimensional stability, frequency stability, and intrinsic thermal conductivity of PENs are not well, which affect the safety and application of electronic fields in some extent.…”

Section: Introductionmentioning

confidence: 99%

Polyarylene ether nitrile/divinyl siloxane‐bisbenzocyclobutene composite films: Curing reaction and thermal/mechanical/dielectric properties

He,

Liu,

Tong

2023

Self Cite

Polymer dielectrics, are commonly used as insulating materials for electronic products. Light weight, good mechanical properties and high thermal conductivity are important properties. However, electrical and thermal parameters are interrelated, and it is challenging to have a dielectric polymer that is also resistant to high temperatures and high thermal conductivity. Hence, high‐performance composite films were prepared by the method of post‐solid phase chemical reaction using polyarylene ether nitrile (PEN) and divinyl siloxane‐bisbenzocyclobutene (BCB) as raw materials. First, parameters of the curing reaction were determined by rheological and activation energy calculations. Then, through adjusting the content of BCB resin and treatment temperature, the performance of PEN/BCB composites could be tuned. Thermal properties have been studied by differential scanning calorimetry, dynamic mechanical analysis, thermal gravimetric analysis, and hot‐disk method. Here, the PEN/BCB composite electric insulating materials with outstanding thermal performance (Tg: 208–400°C, T5%: 469–544°C, thermal conductivity: 1.270–2.215 W/m K). Besides, its mechanical and dielectric properties were investigated in detail. It is noteworthy that the tensile strength of composite film can exceed a maximum of 130 MPa, which is 23.19% higher compared to the untreated one. Also, PEN/BCB composites own low dielectric constant (2.27–4.08 at 1 KHz), and the relationship between frequency or a wide temperature range and dielectric constant/loss is stable. Thus, it has a greater potential for applications in electronics in high‐temperature environments.