Letter to the editor concerning “M. Burkus, F. Tömböl and N. Wiegand et al., Physeal-sparing unreamed locked intramedullary nailing for adolescent tibial fractures, Injury, https://doi.org/10.1016/j.injury.2020.02.049”

Iyer, R Dinesh; Dubey, Siddharth

doi:10.1016/j.injury.2020.09.035

Cited by 1 publication

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“…The type and concentration of CB directly affect the physicochemical, electrical, thermal and mechanical properties of the shielding layer. [5][6][7] In recent years, scholars from various countries have conducted a lot of research for the formulation of semiconductive shielding materials. Tian Lan, an American scholar, prepared the CB/ethyl vinyl acetate (EVA)/LDPE ternary composite by using CB, EVA copolymer, and low-density polyethylene (LDPE).…”

Section: Introductionmentioning

confidence: 99%

Effect of carbon black type and concentration on the performance of semiconductive shielding material of high‐voltage cable

Liu,

Guo,

et al. 2023

Journal of Polymer Science

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Semiconductive shielding layer as an important part of high‐voltage cable, its performance directly affects the safe operation and the service life of the cable. Carbon black (CB) is the main conductive filler of shielding materials, and its type and concentration directly affect the performance of the shielding layer. In this paper, CB‐A with higher structure and CB‐B with lower structure were used as conductive fillers and EBA was chosen as the matrix resin to prepare the shielding materials. The CB concentrations of the shielding materials were 35, 45, and 55 phr. The influences of CB type and concentration on the physicochemical, electrical, thermal and mechanical properties of the shielding materials were investigated. The research shows that when the CB types are the same, the higher the concentration of CB, the more intensive the CB network in the shielding material, and the more serious the CB agglomeration phenomenon. With increasing CB concentration, shielding materials show a decreasing trend of volume resistivity, an increasing trend of thermal conductivity, and a decreasing trend of mechanical properties. When the CB concentration is the equal, the CB‐A has better dispersion in the matrix resin, CB‐A/EBA shielding material has lower volume resistivity and weaker PTC effect, CB‐A/EBA shielding material has higher thermal conductivity at low temperature and CB‐B/EBA shielding material has higher thermal conductivity at high temperature, CB‐A/EBA shielding material has better mechanical properties. A comprehensive comparison shows that CB‐A/EBA shielding material with a concentration of 45 phr has excellent overall performance, with volume resistivity of 15.3 and 68 Ω·cm at 25°C and 90°C, respectively. The thermal conductivity is 0.434 W/(m K) at room temperature and 0.536 W/(m K) at 90°C. The stress is 31.08 MPa and the strain is 570.2%. This work has important reference for the selection of conductive fillers and performance improvement of semiconductive shielding materials.

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Section: Introductionmentioning

confidence: 99%