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

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(trimethylolpropane 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 °C to 130.4 °C. 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 successfully extruded, which could satisfy the static hydraulic blasting test and exhibit improved thermal conduction capability.

Keywords

Electron beam(EB)-irradiation / Cross-linked network / Thermal conductivity

References

[1] Piringer O G BanerA L. Plastic Packaging: Interactions with Food and Pharmaceuticals, 2008

[2] Kurtz S M. UHMWPE Biomaterials Handbook: Ultra High Molecular Weight Polyethylene in Total Joint Replacement and Medical Devices, 2009.

[3] Kavanaugh C. Plastics News, 2016, 28: 3.

[4] Trnka J, Buchar J N E. Macromolecular Symposia, 2017, 373: 1700038.

[5] Hagiwara M, Sohara M, Araki K, Kagiya T. Journal of Applied Polymer Science, 1980, 25: 1541.

[6] Kumar S, Pandya MV. Journal of Applied Polymer Science, 1997, 64: 823.

[7] Duan J, Wang X, Zhang G, Li J. Engineering Plastics Application, 2005, 33: 29.

[8] Song J M, Woo H S, Lee S Y, Sohn J Y. Journal of Applied Polymer Science, 2014, 123: 41760.

[9] Wu X, Wu C, Wang G, Jiang P. Journal of Applied Polymer Science, 2013, 127: 111.

[10] Bik J, Gluszewski W, Rzymski W M, Zagorski Z P. Radiation Physics and Chemistry, 2003, 67: 421.

[11] Ozer Z N. EPJ Web of Conferences, 2017, 154: 1.

[12] Bailey D G, DiMaio G L, Gehring A G, Ross G D. The Journal of the American Leather Chemists Association, 2001, 96: 382.

[13] Bystrov P A, Gordeev A V, Kolokolova A Y, Zavyalov M A, Ilyukhina N V, Molin A A, Pavlov Y S, Polyakova S P, Prokopenko A V, Filippovich V P. Physics of Atomic Nuclei, 2018, 81: 1526.

[14] Aslamazova T R, Kotenev V A, Lomovskaya N Y, Lomovskoy V A, Tsivadze A Y. High Energy Chemistry, 2019, 53: 371.

[15] Yesappa L, Ashokkumar S P, Vijeth H, Basappa M, Ganesh S, Devendrappa H. Journal of Radioanalytical and Nuclear Chemistry, 2019, 322: 5.

[16] Chikaoui K. Radiation Physics and Chemistry, 2019, 162: 18.

[17] Li D, Liu X D, Xiong Z R, Sheng D K, Zhou Y, Yang Y M. Chinese Journal of Polymer Science, 2019, 5: 493.

[18] Wang Z, Hu Y, Gui Z, Zong R. Polymer Testing, 2013, 22: 533.

[19] Bai X L, Mu Z g. IOP Conference Series: Materials Science and Engineering, 2019, 562: 012120.

[20] Yassene A A M, Ismail M R, Afify M S. Journal of Vinyl and Additive Technology, 2019, 1.

[21] Mahantesha B K, Ravindrachary V, Padmakumari R, Sahanakumari R, Tegginamata P, Sanjeev G, Petwal V C, Verma V P. Journal of Radioanalytical and Nuclear Chemistry, 2019, 322: 19.

[22] Zhu S, Shi M, Qu L, Tian M, Xi X. Journal of Donghua University, 2016, 33: 533.

[23] Sujit K D, Cheremisinoff N P C, Anil K B. Advanced Polymer Processing Operations, Advanced Polymer Processing Operations, 1998, 157.

[24] Jones R A, Punyodom W, Ward I M, Johnson A F. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2001, 185: 163.

[25] Xin G, Sun H, Scott S M, Yao T, Lu F, Shao D, Hu T, Wang G, Ran G, Lian J. ACS Applied Materials & Interfaces, 2014, 6: 15262.

[26] Han Z, Fina A. Progress in Polymer Science, 2011, 36: 914.

[27] Teng C C, Ma C C M, Chiou K C, Lee T M. Composites Part B: Engineering, 2012, 43: 265.

[28] Shi Z, Fu R, Agathopoulos S, Gu X, Zhao W. Materials and Design, 2012, 34: 820.

[29] Zhou T L, Wang X, Liu X H, Xiong D S. Carbon, 2010, 48: 1171.

[30] Gwaily S E, Badawy M M, Hassan H H, Madani M. Polymer Testing, 2003, 22: 3.

[31] Im H, Kim J. Carbon, 2011, 49: 3503.

[32] National Standards for the People’s Republic of China. Test Method for Internal Pressure Resistance of Thermoplastic Pipes for Fluid Transportation, GB/T 6111–2003, 2003, Beijing: General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China.