scholarly journals Theoretical Study on the Grafting Reaction of Maleimide to Polyethylene in the UV Radiation Cross-Linking Process

Polymers ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1044
Author(s):  
Hui Zhang ◽  
Yan Shang ◽  
Hong Zhao ◽  
Chunyang Li ◽  
Xuan Wang ◽  
...  
Keyword(s):  
Uv Radiation ◽  
High Voltage ◽  
Energy Surface ◽  
Cross Linking ◽  
Cable Insulation ◽  
Practical Applications ◽  
Insulation Materials ◽  
Grafting Reaction ◽  
Reaction Potential ◽  
Reaction Channels

Theoretical investigation of the reaction of graft maleimide to polyethylene in the UV radiation cross-linking process is accomplished at the B3LYP/6-311+G(d,p) level for high-voltage cable insulation materials. The reaction potential energy surface of the nine reaction channels is identified. The results show that the N,N′-ethylenedimaleimide can connect two 4-methylheptane molecules and act as the cross-linking agent. The calculated reaction potential barrier of forming 4-methylheptane radical by maleimide is higher than that of maleic anhydride. The study is expected to provide a basis for optimizing the UV radiation cross-linking polyethylene process and development more than 500 kV high-voltage cable insulation materials in practical applications.

scholarly journals Theoretical study on the reaction of triallyl isocyanurate in the UV radiation cross-linking of polyethylene

RSC Advances ◽  
2017 ◽  
Vol 7 (59) ◽  
pp. 37095-37104 ◽  
Author(s):  
Hong Zhao ◽  
Junqi Chen ◽  
Hui Zhang ◽  
Yan Shang ◽  
Xuan Wang ◽  
...  
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Uv Radiation ◽  
Theoretical Investigation ◽  
High Voltage ◽  
Energy Surface ◽  
Theoretical Study ◽  
Cross Linking ◽  
Surface Information ◽  
Reaction Potential

Herein, a theoretical investigation on the reaction potential energy surface information of triallyl isocyanurate (TAIC) in the UV radiation cross-linking process of polyethylene is conducted at the B3LYP/6-311+G(d,p) level for the production of high voltage cable insulation materials.

scholarly journals Further discussion on the reaction behaviour of triallyl isocyanurate in the UV radiation cross-linking process of polyethylene: a theoretical study

2019 ◽  
Vol 6 (9) ◽  
pp. 182196
Author(s):  
Hui Zhang ◽  
Yan Shang ◽  
Hong Zhao ◽  
Xuan Wang ◽  
Baozhong Han ◽  
...  
Keyword(s):  
Uv Radiation ◽  
High Voltage ◽  
Density Functional ◽  
Isomerization Reaction ◽  
Cross Linking ◽  
Insulation Material ◽  
Functional Theory ◽  
Reaction Potential ◽  
Reaction Channels ◽  
Better Than

Further theoretical investigation on the reaction behaviour of triallyl isocyanurate (TAIC) in the UV radiation cross-linking process of polyethylene (PE) is accomplished by density functional theory for high voltage cable insulation materials. The reaction potential energy information of the 13 reaction channels at B3LYP/6–311 + G( d,p ) level are identified. These have been explored that the TAIC take part in the reaction behaviour on ground state during UV radiation cross-linking process and TAIC intra-molecular isomerization reaction itself. In addition, the results show that the effect of multiplication and acceleration for the cross-linking reaction of trimethylopropane trimethacrylate (TMPTMA) would be better than that of TAIC. It has further clarified the reasons why UV radiation cross-linking reaction of PE had been initiated by benzophenone (Bp), and the TAIC or TMPTMA needed to take part. The results obtained in the present study could directly guide both the optimization of UV radiation cross-linking PE process and the development of the insulation material of high-voltage cable in real application.

Theoretical study on the reaction mechanism in the UV radiation cross-linking process of polyethylene

RSC Advances ◽  
2016 ◽  
Vol 6 (112) ◽  
pp. 110831-110839 ◽  
Author(s):  
Hui Zhang ◽  
Yan Shang ◽  
Mingxia Li ◽  
Hong Zhao ◽  
Xuan Wang ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Uv Radiation ◽  
High Voltage ◽  
Theoretical Study ◽  
Voltage Stabilizer ◽  
Cross Linking ◽  
Real Application ◽  
Polyethylene Molecule

The grafting of the valerophenone as voltage stabilizer to the polyethylene molecule chain is possible in the UV radiation cross linking process. This is useful for preparing insulation cables of high voltage up to 500 kV in real application.

Theoretical study on the grafting reaction of maleimide and its derivatives to polyethylene in the UV radiation cross-linking process

2018 ◽  
Vol 30 (3) ◽  
pp. 1033-1039 ◽  
Author(s):  
Yang Wang ◽  
Hui Zhang ◽  
Hong Zhao ◽  
Ting An ◽  
Xia Du ◽  
...  
Keyword(s):  
Uv Radiation ◽  
Theoretical Study ◽  
Cross Linking ◽  
Grafting Reaction

1250-kilovolt scanning transmission electron microscope

1984 ◽  
Vol 42 ◽  
pp. 624-625
Author(s):  
T. Imura ◽  
S. Maruse ◽  
K. Mihama ◽  
M. Iseki ◽  
M. Hibino ◽  
...  
Keyword(s):  
High Voltage ◽  
Electron Probe ◽  
Scanning Transmission Electron Microscope ◽  
Pressure Vessels ◽  
Practical Applications ◽  
Voltage Generator ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
New Applications ◽  
High Voltage Generator

Ultra high voltage STEM has many inherent technical advantages over CTEM. These advantages include better signal detectability and signal processing capability. It is hoped that it will explore some new applications which were previously not possible. Conventional STEM (including CTEM with STEM attachment), however, has been unable to provide these inherent advantages due to insufficient performance and engineering problems. Recently we have developed a new 1250 kV STEM and completed installation at Nagoya University in Japan. It has been designed to break through conventional engineering limitations and bring about theoretical advantage in practical applications.In the design of this instrument, we exercised maximum care in providing a stable electron probe. A high voltage generator and an accelerator are housed in two separate pressure vessels and they are connected with a high voltage resistor cable.(Fig. 1) This design minimized induction generated from the high voltage generator, which is a high frequency Cockcroft-Walton type, being transmitted to the electron probe.

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