Space Charge and Breakdown Strength Behaviour of PP/POE/MgO Nanocomposites

Wei, Min; Wang, Xinyu; Andritsch, Thomas

doi:10.1109/icempe.2019.8727367

Cited by 3 publications

(7 citation statements)

References 13 publications

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“…where δ is the average hopping distance, ϕ is the average hopping barrier height. The measurement results are fitted by numerical fitting method according to the formula (7) and (8). The average hopping distances for all the samples are obtained and listed in Table 2, which is in the reasonable range of 5-20 nm, hence it is proposed that the hopping conduction model is suitable to describe the charge transport behaviour for PP and its blends in this work.…”

Section: Charge Transport Behaviourmentioning

confidence: 99%

“…where δ is the average hopping distance, ϕ is the average hopping barrier height. The measurement results are fitted by numerical fitting method according to the formula (7) and (8).…”

Section: Charge Transport Behaviourmentioning

confidence: 99%

“…Charge transport behaviour has attracted much attention in the research field of electrical insulation materials [5][6][7][8][9][10][11][12]. That is a microcosmic expression to evaluate electrical properties of materials, which is closely related to the microstructure and the crystal structure of materials [13].…”

Section: Introductionmentioning

confidence: 99%

“…Many investigations have been performed in order to improve the electrical performance of PP/elastomer blend. J. W. Zha the doping of metallic oxide nanoparticles into PP/elastomer blend could effectively suppress the accumulation of space charge and improve the breakdown strength [5][6][7][8]. However, the large concentration of nanoparticles could lead to the agglomeration, which introduces the physical defects into the insulation.…”

Section: Introductionmentioning

confidence: 99%

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Influence of thermally induced self‐assembly shish‐kebab crystal on charge transport behaviour in polypropylene/elastomer blends

Gao

Zheng

et al. 2021

IET Science Measure & Tech

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This paper reports on the influence of thermally induced self-assembly shish-kebab crystal on charge transport behaviour in polypropylene (PP) and PP/propylene-based elastomer (PBE) blends. The film samples with the shish-kebab crystal were prepared by adding a β nucleating agent TMB-5 under thermally induced self-assembly. Polarised optical microscope (POM), X-ray diffraction (XRD) and differential scanning calorimetry (DSC) measurements were performed to understand the crystallisation characteristics of samples. Carrier trap distribution was analysed by isothermal surface potential decay (ISPD) method, and DC breakdown strength measured as well. The decrease of shish-kebab crystal size, the reduction of trap level, the increase of shallow trap density and the decrease of deep trap density were obtained with the TMB-5 content. The hopping distance of charges decreased with the shallow trap density increasing. The DC breakdown strength for PP/PBE/TMB-5 was higher than that for PP/TMB-5. It is suggested that deep traps are formed on the clear shish-kebab crystal boundaries, while shallow traps are induced by the elastomer and the un-crystallisation nucleating agents. Both the carrier trap formation on the crystal boundary and the physical channel orientation of the shish-kebab crystals affect the charge transport behaviour.

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Section: Charge Transport Behaviourmentioning

confidence: 99%

“…where δ is the average hopping distance, ϕ is the average hopping barrier height. The measurement results are fitted by numerical fitting method according to the formula (7) and (8).…”

Section: Charge Transport Behaviourmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of thermally induced self‐assembly shish‐kebab crystal on charge transport behaviour in polypropylene/elastomer blends

Gao

Zheng

et al. 2021

IET Science Measure & Tech

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“…[9][10][11][12] Among them, POE materials have excellent electrical properties, processing properties, and heat and cold resistance properties, which are favored by scholars. 13,14 As a semi-crystalline thermoplastic material with high crystallinity, the crystallization behavior of polypropylene has a close correlation with the macroscopic force-electric properties of the material, and changing the crystallization behavior of polypropylene is bound to have an obvious effect on the properties of polypropylene. Therefore, improving the properties of the blends by changing the crystallization behavior of polypropylene is also a feasible direction for improvement.…”

Section: Introductionmentioning

confidence: 99%

Effect of β‐nucleating agents on the crystallization behavior and force‐electric properties of the polypropylene blends

Gao,

Jiang,

Yao

et al. 2023

Vinyl Additive Technology

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Polypropylene blends with different crystalline shapes were prepared to explore the effect of crystalline structure on the force and electrical properties of polypropylene‐elastomer blends and the mechanism of influence. The crystallization behaviors of the blends were characterized by x‐ray diffraction (XRD), polarized light microscopy (PLM), and differential scanning calorimetry (DSC). The mechanical and dielectric properties of the blends were tested to find the correspondence between crystallization characteristics and properties. The results show that the addition of the β‐nucleating agent changes the crystalline shape of PP blends from α to β crystalline, significantly reduces the crystallite size of the blends, and significantly improves the crystallinity of the blends by forming dense crystalline regions embedded in each other. The appropriate amount of the β‐nucleating agent facilitates thermal vibration between electrons and lattice and hinders the carrier migration, significantly reducing the conductivity and increasing the breakdown field strength from 84.81 to 102.30 kV/mm.Highlights The β nucleating agents can alleviate the defects of polypropylene's excessive rigidity and effectively improve the mechanical properties of polypropylene blends. Appropriate amount of the β nucleating agent can significantly improve the electrical properties of polypropylene blends. The addition of the β nucleating agent can significantly improve the crystallinity of the blends and construct the dense crystalline region of the interlock. The small size of the crystals improves the breakdown properties of the polymer by increasing the energy exchange between the electrons and the lattice, which mitigates the impact of high‐energy electrons on the polymer.

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Dielectric properties of polypropylene blended with copolymers of varying ethylene contents

Kamarudin,

Lau,

Ahmad

et al. 2024

Polymer Engineering & Sci

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Polypropylene (PP) has recently been actively investigated as a potential power cable insulation substitute for crosslinked polyethylene (XLPE). This is mainly due to PP's higher thermal withstand capability over XLPE. Notably, PP has much higher stiffness than XLPE and therefore needs to be modified with tougher materials to reduce its overall stiffness while maintaining its desirable dielectric properties. To date, many investigations have been conducted on the mechanical and dielectric effects of PP blended with various copolymers. Nevertheless, systematic investigations on the dielectric effects of PP blended with ethylene‐based copolymers having different ethylene contents are less explored. The current work therefore reports on the impact of different ethylene contents of ethylene‐based copolymers on the breakdown performances of PP. The findings reveal that PP blended with a copolymer having a low ethylene content (68.7 wt%) results in at least 11% higher breakdown performance than PP containing a copolymer having a high ethylene content (77.0 wt%). Specifically, PP containing 10 wt% of copolymers having 68.7 wt% of ethylene content results in comparable breakdown performance to XLPE (325 kV mm−1). These results suggest that ethylene‐based copolymers with an appropriately low ethylene content can be blended with PP to achieve desirable breakdown properties.Highlights PP is blended with copolymers of varying amounts and ethylene contents. PP blended with low amounts of copolymers has good breakdown strength. PP blended with low ethylene level copolymers has favorable breakdown strength. PP blended with copolymers of low ethylene contents is desirable. The breakdown mechanisms are related with the structure and permittivity.

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Space Charge and Breakdown Strength Behaviour of PP/POE/MgO Nanocomposites

Cited by 3 publications

References 13 publications

Influence of thermally induced self‐assembly shish‐kebab crystal on charge transport behaviour in polypropylene/elastomer blends

Influence of thermally induced self‐assembly shish‐kebab crystal on charge transport behaviour in polypropylene/elastomer blends

Effect of β‐nucleating agents on the crystallization behavior and force‐electric properties of the polypropylene blends

Dielectric properties of polypropylene blended with copolymers of varying ethylene contents

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