Direct correlation between charge evolution and crystalline structure in isotactic polypropylene

Zhang, Ling; Chen, Teng; Zhou, Yuanxiang; Peng, Zhaowei; Zhang, Yunxiao

doi:10.1109/icpadm.2018.8401264

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…The polymer's crystalline morphology will affect the material's trap characteristics, thus affecting the carrier transport process. By adding β-NA into PP, it was found that the introduction of β-crystal deepened the trap energy level of the composites, thus inhibiting the accumulation of space charges [21]. It is found that when the β-NA doping content is 0.1 wt.% ~ 0.5 wt.%, the composite has a "flower-shaped" β-crystal morphology, and its mechanical properties and space charge suppression effect are the best [22].…”

Section: Crystal Form Regulationmentioning

confidence: 99%

Electrical Property of Polypropylene Toughened by β Nucleating Agent

Zhang¹,

Zhou²,

Wang³

2024

Conductivity and Thermoplastic Elastomer Properties of Polypropylene Materials

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High-performance polymer insulating material is a crucial knob for developing HVDC power cables. However, the production process of traditional cross-linked polyethylene, especially degassing, is complicated. The space charge accumulation could render severe electric field distortion under high temperatures and electrical stresses, detrimental to the insulation reliability. As a potential alternative, polypropylene (PP) has excellent properties and is environmentally friendly. However, crucial challenges for the PP application include brittleness deficiency at low temperatures and space charge problems caused by toughened PP composites. In recent years, the β nucleating agent (β-NA) has emerged as an effective additive to improve mechanical and electrical properties due to the introduction of the β-crystal form. Herein, PP/β-NA with different contents and self-assembled β-NA were subsequently prepared, respectively. The melting and crystallization behaviors, crystalline structure, and electrical properties were systematically investigated, and the influence on the space charge characteristics of PP/β-NA composites was explored. We aim to summarize the β-crystal form regulation strategies for advanced PP materials and how they perform, point out the critical characteristic parameters to improve the target performance, and offer suggestions for the rational design for future HVDC cable engineering.

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Section: Crystal Form Regulationmentioning

confidence: 99%