Thermally Conductive Study of Polyethylene/Al2O3 Composite Networks Cross-linked by Electron Beam Irradiation

doi:10.1007/s40242-019-0008-3

Chemical Research in Chinese Universities ›› 2020, Vol. 36 ›› Issue (5): 940-945.doi: 10.1007/s40242-019-0008-3

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Thermally Conductive Study of Polyethylene/Al₂O₃ Composite Networks Cross-linked by Electron Beam Irradiation

SHI Chengying¹, YANG Jiayu¹, LIU Yang², WANG Yanmiao³, XU Wenge², XU Yiquan³, HU Wei⁴, LIU Baijun¹

1. Key Laboratory of High Performance Plastics, Ministry of Education, National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, College of Chemistry, Jilin University, Changchun 130012, P. R. China;
2. Changchun Radiation Technology Co., Ltd., China Isotope & Radiation Corporation(CIRC), Changchun 130102, P. R. China;
3. Changchun Kinwa High Technology Co., Ltd., Changchun 130102, P. R. China;
4. Key Laboratory of Polyoxometalate Science, Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China

Received:2019-10-17 Revised:2019-11-25 Online:2020-10-01 Published:2020-10-01
Contact: LIU Baijun E-mail:liubj@jlu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos.51873076, 21404013), the Science and Technology Development Plan of Jilin Province, China(Nos.20180201076GX, 20180201075GX), the Industrial Technology Research and Development Funds of Jilin Province, China(No.2019C042-4) and the Open Research Fund of State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences (No.201826).

Abstract

Abstract: The surface-modified Al₂O₃ particles were introduced into polyethylene(PE) to enhance the thermal conductivity, and PE/Al₂O₃ cross-linked networks with improved thermal and mechanical properties were prepared through electron beam(EB) irradiation technology. The incorporation of reactive irradiation sensitizer was useful in fabricating a high degree of cross-linking(DC) PE networks under a low irradiation dose. In the PE sample containing 2% sensitizer, DC ca.67.1% could be obtained under 60 kGy(1 kGy=1000 J/kg). EB-irradiation greatly improved the tensile stress of PE-based samples, and the tensile stresses of the samples with 0.2%-5% TMPTA(trimethylolpro-pane triacrylate) under 60 kGy were 24.61-27.77 MPa. All the EB-irradiated samples had higher Vicat softening temperatures than the samples without irradiation. After treatment at 120 kGy, the Vicat softening temperatures of PE-Al₂O₃-44/TMPTA-2 increased from 127℃ to 130.4℃. SEM images revealed that PE-Al₂O₃-50 samples with increased amount of Al₂O₃ particles showed a conduction "pathway," and thermal conductivity reached 0.67 W/(m·K). Thus, high-performance pipes were extruded, which could satisfy the static hydraulic blasting test and exhibit improved thermal conduction capability.

Key words: Electron beam(EB)-irradiation, Cross-linked network, Thermal conductivity

SHI Chengying, YANG Jiayu, LIU Yang, WANG Yanmiao, XU Wenge, XU Yiquan, HU Wei, LIU Baijun. Thermally Conductive Study of Polyethylene/Al₂O₃ Composite Networks Cross-linked by Electron Beam Irradiation[J]. Chemical Research in Chinese Universities, 2020, 36(5): 940-945.

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Thermally Conductive Study of Polyethylene/Al₂O₃ Composite Networks Cross-linked by Electron Beam Irradiation

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