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Molecular dynamics analysis on effect of PEGDGE on mechanical and thermal properties of epoxy materials for insulated pull rod
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Ying WEI1, Feiyue MA1, Yuchen LIU2, Chong ZHANG3, Huize CUI3, Ruilu GUO3, Shuo CHEN3, Yushun ZHAO2
Insulating Materials | 2024, 57(12) : 27 - 35
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Insulating Materials | 2024, 57(12): 27-35
• Material Research •
Molecular dynamics analysis on effect of PEGDGE on mechanical and thermal properties of epoxy materials for insulated pull rod
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Ying WEI1, Feiyue MA1, Yuchen LIU2, Chong ZHANG3, Huize CUI3, Ruilu GUO3, Shuo CHEN3, Yushun ZHAO2
Affiliations
  • 1Electric Power Research Institute of State Grid Ningxia Power Co., Ltd., Yinchuan 750002, China
  • 2School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
  • 3China Electric Power Research Institute Co., Ltd., Beijing 102211, China
Published: 2024-12-20 doi: 10.16790/j.cnki.1009-9239.im.2024.12.004
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To investigate the influence law and mechanism of polyethylene glycol diglycidyl ether (PEGDGE) on the mechanical and thermal properties of epoxy materials for insulated pull rods, molecular dynamics simulations were used to calculate and analyze the macroscopic properties and microscopic structural parameters of epoxy resin cross-linked systems with PEGDGE mass fractions of 0, 5%, 10%, 15%, and 20% (percentage of epoxy resin mass), respectively. The effect of PEGDGE content on the mechanical and thermal properties of epoxy materials for insulated pull rods was summarized, the influence mechanism was elucidated from the perspective of system structure, and the calculation results were verified through experiments. The results show that with the introduction of PEGDGE, the glass transition temperature, tensile strength, and bending strength of epoxy resin, as well as the viscosity of castable decrease, while the impact strength of epoxy resin increases. When the mass fraction of PEGDGE is 5%, the material shows the best comprehensive performance. PEGDGE molecules with high flexibility increases the free volume fraction, mean square displacement, and the ratio of bulk modulus to shear modulus (K/G) of the epoxy resin system, which enhances the mobility of molecular segments, and leads to the increase of toughness and the decrease of rigidity of the epoxy resin material.

polyethylene glycol diglycidyl ether  /  epoxy resin  /  molecular dynamics  /  insulated pull rod
Ying WEI, Feiyue MA, Yuchen LIU, Chong ZHANG, Huize CUI, Ruilu GUO, Shuo CHEN, Yushun ZHAO. Molecular dynamics analysis on effect of PEGDGE on mechanical and thermal properties of epoxy materials for insulated pull rod[J]. Insulating Materials, 2024 , 57 (12) : 27 -35 . DOI: 10.16790/j.cnki.1009-9239.im.2024.12.004
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Year 2024 volume 57 Issue 12
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2024.12.004
  • Receive Date：2023-09-23
  • Online Date：2025-12-24
  • Published：2024-12-20
Article Data
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History
  • Received：2023-09-23
  • Revised：2023-12-29
Funding
Affiliations
    1Electric Power Research Institute of State Grid Ningxia Power Co., Ltd., Yinchuan 750002, China
    2School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
    3China Electric Power Research Institute Co., Ltd., Beijing 102211, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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