Simultaneously enhancing the thermal conductivity and dielectric constant of BN/CF hybrid filled polypropylene/polystyrene composites via in situ reactive processing

Jiang, Xueliang; Ma, Pengfei; Zhou, Cong; Zhu, Wenwen; You, Feng; Yao, Chu; Liu, Fangjun

doi:10.1002/pc.25449

Cited by 10 publications

(5 citation statements)

References 31 publications

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“…The dielectric constants of cPBO-15 and cPBO-20 were higher than that of cPBO-10 due to their decreased porosity. All cPBO aerogels had a lower dielectric constant than that of other high-performance polymers such as polyimide, , polystyrene, polyaryletherketone, , and polysiloxane . Also, the dielectric losses of cPBO and P( o AI-a) aerogels(Figure b) were very small; most of them were less than 0.06.…”

Section: Resultsmentioning

confidence: 96%

Preparing Multifunctional High-Performance Cross-Linked Polybenzoxazole Aerogels from Polybenzoxazine

Wang

Zhan

et al. 2021

ACS Appl. Polym. Mater.

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Polybenzoxazole (PBO) aerogels have such valuable properties as excellent thermal and chemical stability, good fire resistance, and electronic transmission. However, the current processes to produce these aerogels tend to be complex and inefficient, and they are difficult to process into complex shapes. In this paper, we report a strategy to prepare cross-linked PBO (cPBO) aerogels by the polybenzoxazine. The polybenzoxazine aerogels were obtained first and then converted into cPBO aerogels through heat treatment. The prepared cPBO aerogels not only had low thermal conductivity (0.030 to 0.039 W m −1 K −1 ) but also possessed excellent mechanical properties (compressive modulus of 84.68 MPa) and low dielectric properties (1.51 at 1 kHz). These are attributable to the intrinsic structure of cPBO and the high porosity of aerogels in general. Because small-molecule ortho-functionalized benzoxazine has good solubility and can be used to prepare homogeneous solutions with various solid contents, this preparation strategy avoids the defect of directly using PBO resin, which has poor solubility and poor processability. Moreover, the pores of the cross-linked polybenzoxazine aerogels can be retained to the greatest extent during heat treatment. The preparation process is simple, efficient, and has a good application prospect.

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Section: Resultsmentioning

confidence: 96%

Preparing Multifunctional High-Performance Cross-Linked Polybenzoxazole Aerogels from Polybenzoxazine

Wang

Zhan

et al. 2021

ACS Appl. Polym. Mater.

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“…Furthermore, the result can be concluded from the Table 2 that the T 5% and the T 50% were increased significantly compared with the PP70/PS30 blend, which indicated that the hybrid nanofillers had a nice enhancement on the thermal stability of the PP/PS blend. Jiang et al 35 investigated the stability of the BN/CF hybrid filled PP/PS composites. The result showed that higher thermal stability of BN/CF/PP/PS composites can be achieved, which was consistent with the result in this work.…”

Section: Resultsmentioning

confidence: 99%

“…The addition of clay degraded the mechanical properties of the blends due to the poor adhesion between the OMC and the PP matrix. Jiang et al 35 prepared the BN/CF hybrid filled PP/PS composites via in‐situ reactive processing and studied the morphology and properties of the composites. The results showed that the BN and CF were selectively localized in PS phase, the thermal conductivity and dielectric constant of the composites improved obviously compared with that of composites prepared by simple melt blending technique.…”

Section: Introductionmentioning

confidence: 99%

Impact of hybrid nanofillers on the structure and property of polypropylene/polystyrene composites based on elongation flow

Chen

Yang

Xiao-zhuang

et al. 2021

Polymers for Advanced Techs

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The composites comprised of polypropylene (PP), polystyrene (PS) and hybrid nanofillers were prepared by a novel eccentric rotor extruder based on elongation flow. The morphology, thermal behavior and rheological properties were investigated. The morphology of the PS dispersed phase changed from circular shape of PP70/PS30 blend to microfiber shape of PP/PS/MWCNTs/MMT composite with an increase of the number of the hybrid nanofillers dimensions. The nano‐TiO2 and MWCNTs were mainly located at the interface, did not change the shape of the PS dispersed phase but reduce the size of the dispersed phase. The hybrid nanofillers containing MWCNTs had better modification effect on the improvement of the crystalline ability of PP compared with the hybrid nanofillers without MWCNTs. The introduction of the hybrid nanofillers did not affect the crystal type of PP, but influence the perfection of crystallization of PP. The hybrid nanofillers had a nice enhancement on the thermal stability of the PP/PS blend. Compared with PP, the low frequency G′ of the hybrid nanofillers filled PP70/PS30 composites increased by two orders of magnitude. With an increase of the dimensionality of the hybrid nanofillers, the restriction of the molecular chains relaxation caused by the hybrid nanofillers was enhanced.

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“…Sangamesh et al 35 found that 1.5 wt% BN filled CF/epoxy resin (EP) showed the improvement of tensile modulus by 19.4% whereas the tensile strength improvement by 12.3% in comparison with those of unfilled composites. In addition, Jiang et al 36 showed that the thermal conductivity values was promoted from 0.22 W/(m·K) for polypropylene (PP)/polyethylene (PS) blends to 0.62 W/(m·K) with 14.5 wt% BN and 18 wt% CF. Obviously, the addition of h‐BN and CF will enhance the mechanical properties and thermal conductivity of the polymeric matrices.…”

Section: Introductionmentioning

confidence: 99%

Wear resistant PEEK composites with great mechanical properties and high thermal conductivity synergized with carbon fibers and h‐BN nanosheets

Han

et al. 2023

Polymers for Advanced Techs

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It is well known that carbon fiber (CF) reinforced PEEK (polyether‐ether‐ketone) (defined as “PEEK/CF”) composites have excellent properties and have been widely used in diverse fields. Meanwhile, hexagonal boron nitride (h‐BN), as an excellent nano reinforcing agent, is often incorporated into polymer to improve its mechanical strength and thermal conductivity. Herein, PEEK matrix was regulated by adding high‐strength CF as the load‐bearing phase and 2D h‐BN sheets as the solid lubricant and thermally conductive fillers prepared by melt blending to achieve the multi‐scale packing of uniform mixing. The results show that h‐BN is well dispersed in PEEK matrix and improves the interfacial bonding between CF and PEEK matrix, exhibiting a good synergistic effect in enhancing tensile properties of composites. PEEK composite with 20 wt% CF and 4 wt% h‐BN (referred as P/20C/4B) exhibits the highest tensile strength (176.05 MPa) and thermal conductivity (0.396 W/(m·K)), which are 97.54% and 126.3% over those of pure PEEK (89.12 MPa; 0.175 W/(m·K)), respectively. In addition, PEEK composite with 10 wt% CF and 4 wt% h‐BN (referred as P/10C/4B) has excellent tribological properties with a friction coefficient of 0.15, the lowest fiction temperature (30.5°C) and a relative low wear rate of 1.62 × 10−6 mm3/(N·m) among them. The synergitic effects of h‐BN and CF on mechanical, tribological properties and thermal conductivity of PEEK composites provides a very broad prospect in their application of low frictional and wear resistant polymeric materials.

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Simultaneously enhancing the thermal conductivity and dielectric constant of BN/CF hybrid filled polypropylene/polystyrene composites via in situ reactive processing

Cited by 10 publications

References 31 publications

Preparing Multifunctional High-Performance Cross-Linked Polybenzoxazole Aerogels from Polybenzoxazine

Preparing Multifunctional High-Performance Cross-Linked Polybenzoxazole Aerogels from Polybenzoxazine

Impact of hybrid nanofillers on the structure and property of polypropylene/polystyrene composites based on elongation flow

Wear resistant PEEK composites with great mechanical properties and high thermal conductivity synergized with carbon fibers and h‐BN nanosheets

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