Photoinitiated crosslinking of EPDM/inorganic filler blends and characterization of related properties

Song, Xupeng; Wu, Qianghua; Qu, Baihua

doi:10.1007/s10118-010-8225-8

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…UV crosslinking technology is a newly developed preparation process for insulating materials, which has the advantages of simple process equipment, less stringent safety protection requirements, low production energy consumption, and less stringent requirements for crosslinking reaction temperature [7]. However, the cross-linking temperature and intensity of the ultraviolet light source at that time were low, resulting in a slow cross-linking reaction speed and thin cross-linking thickness, which could not meet the manufacturing requirements of cables [8,9]. Ma et al [10] conducted a comparative study on the performance of UV cross-linked polyethylene and silane cross-linked polyethylene wires and cables.…”

Section: Introductionmentioning

confidence: 99%

Study on the direct current properties of ultraviolet crosslinked epdm rubber

Yang,

Chen,

et al. 2024

J. Phys.: Conf. Ser.

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Ethylene propylene diene monomer (EPDM) is widely used as an insulation material in power equipment due to its excellent insulation performance. This article studies the method of preparing EPDM rubber composites by UV cross-linking. It analyzes three traditional functional auxiliary cross-linking agents, namely allyl isocyanurate (TAIC), trimethylolpropane trimethyl Effects of methyl acrylate (TMPTMA), and N, N′-m-phenylene bismaleimide (N, N′) on the DC properties of EPDM rubber. Experimental results show that all three auxiliary cross-linking agents can effectively improve the DC conductivity of EPDM, and (N, N′) are the most effective. Thermal stimulation current (TSC) results show that the addition of N, N′ makes the traps of EPDM shallower. Based on density functional theory (DFT), the electrostatic potential of N, N’ molecules is calculated. The increase in DC conductivity of EPDM is because the N, N′ molecules have larger conjugated electron areas, forming a larger conductive area within the molecules, which is conducive to charge carrier transport.

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Section: Introductionmentioning

confidence: 99%

Study on the direct current properties of ultraviolet crosslinked epdm rubber

Yang,

Chen,

et al. 2024

J. Phys.: Conf. Ser.

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“…[4][5][6][7] In particular, the UV crosslinking reaction can be completed within seconds, which can significantly improve the manufacturing efficiency. However, as the material for use in cable insulation layer, EPDM needs to be modified by adding a large number of inorganic fillers to reinforce its mechanical strength, [8][9][10] which makes it non-transparent and almost impossible for ultraviolet light to penetrate into the material and complete sufficient cross-linking reaction. As a result, the UV crosslinking technology has not been successfully applied in the industrial production of EPDM insulated cables.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet light irradiated high‐efficiency crosslinking and insulating properties of LLDPE/EPDM blends

Shao,

Li,

Zhao

et al. 2023

J of Applied Polymer Sci

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Ultraviolet light (UV) irradiation crosslinked linear low‐density polyethylene (LLDPE)/ethylene propylene diene monomer (EPDM) composites with different blending ratios were prepared using benzophenone (BP) as photoinitiator and triallyl isocyanurate (TAIC) as crosslinking agent. The irradiation time was determined, the effects of rubber‐plastic ratio on the crystallization behaviors, mechanical properties, crosslinking properties and electrical properties of LLDPE/EPDM composites were investigated. The results show that with the increase of EPDM content, the crystalline structure of LLDPE/EPDM composite become looser and the crystallinity decreased. The blending of EPDM and LLDPE results in two different aggregation states of the same crystalline form. With the increase of LLDPE content, the crosslinking efficiency, tensile strength, and energy storage modulus show a significant upward trend. When two polymers simultaneously exist in the material, if the difference between the contents of two polymers is large, the breakdown strength of the composite is relatively lower. The relaxation polarization of LLDPE/EPDM at low frequencies increases with the content of EPDM, thus leading to the increase of loss factor at low frequencies. A novel UV crosslinked modified EPDM insulating material with high production efficiency and improved insulation performances has been developed for use as an insulating layer for flexible power cables.

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Study of the Photocrosslinking of Ethylene Propylene Diene Monomer Terpolymer Under UV Irradiation

Jégo

Milési²,

Robin

et al. 2019

Polymer Engineering & Sci

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The photocrosslinking of thick samples of 5‐ethylidene‐2‐norbornene–ethylene propylene diene monomer (ENB‐EPDM) under air at room temperature was investigated. First, a model study was carried out on low‐molecular weight oligomers: squalene, 1,2‐polybutadiene, and 1,4‐polybutadiene. Several crosslinking agents (meth(acrylics), bismaleimide, and thiol) combined with various photoinitiators were tested to improve the reactivity of these oligomers under UV irradiation. Gel contents, crosslinking densities, viscosities, and viscoelastic properties were measured in order to characterize the extent of crosslinking. Acrylate‐based crosslinking agents appeared to be the most reactive species and these results were then applied to a low‐molecular weight EPDM. Several photoinitiators were tested and benzophenone turned out to be the most efficient photoinitiator when combined with trimethylolpropane triacrylate. Finally, a commercial EPDM was subsequently photocrosslinked and high gel content and crosslinking density were obtained after only 2 min of irradiation. POLYM. ENG. SCI., 60:95–103, 2020. © 2019 Society of Plastics Engineers

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Photoinitiated crosslinking of EPDM/inorganic filler blends and characterization of related properties

Cited by 4 publications

References 17 publications

Study on the direct current properties of ultraviolet crosslinked epdm rubber

Study on the direct current properties of ultraviolet crosslinked epdm rubber

Ultraviolet light irradiated high‐efficiency crosslinking and insulating properties of LLDPE/EPDM blends

Study of the Photocrosslinking of Ethylene Propylene Diene Monomer Terpolymer Under UV Irradiation

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