Analysis of the Curing Behavior of Cyanate/Epoxy Resins for Fusion Magnets

Abstract:

ITER IF coils and the German WX-7 star simulator fusion reactor both use cyanate ester/epoxy resin as the matrix material for their insulation structure. The main reason is that cyanate ester/epoxy resin insulation materials have low-temperature mechanics and radiation resistance, and have extremely low rheological properties and long applicability periods. However, high-energy polymerization will occur when the two are mixed, releasing a huge amount of heat. This study used different molds to prepare cyanate ester/epoxy resin (mass ratio 4:6), and used DSC (Differential Calorimetry Scanning) thermal analyzer and temperature monitoring to study the curing behavior and thermal stability of cyanate ester-modified epoxy resin-based materials. After multiple optimizations, the resin was completely cured within a controllable range, and there was no significant change in the glass transition temperature before and after adjustment.

• Periodical: Solid State Phenomena (Volume 356)
• Pages: 35-40
• DOI: https://doi.org/10.4028/p-D57Zjm
• Online since: March 2024
• Authors: Baoleer Baoleer, Yue Xiang, Li Shi*, Wen Tao Sun, Zhi Xiong Wu, Rong Jin Huang, Lai Feng Li
• Keywords: Cyanate, Epoxy Resin, Flash Polymerization, Fusion Magnet, Thermal Runaway

References

[1] A. Nishimura, Y. Izumi, S. Nishijima, T. Hemmi, and T. Shikama, "FISSION NEUTRON IRRADIATION EFFECT ON INTERLAMINAR SHEAR STRENGTH OF CYANATE ESTER RESIN GFRP AT RT AND 77 K," American Institute of Physics, 2010.

DOI: 10.1063/1.3402293

[2] K.Bittner-Rohrhofer, K.Humer, and H.W. Weber, "Low-temperature tensile strength of the ITER-TF model coil insulation system after reactor irradiation," Cryogenics, 2002.

DOI: 10.1016/s0011-2275(02)00039-5

[3] K. Humer, K. Bittner-Rohrhofer, H. Fillunger, R. K. Maix, R. Prokopec, and H. W. Weber, "Radiation effects on the mechanical properties of insulators for fusion magnets," Fusion Engineering and Design, vol. 81, no. 20-22, pp.2433-2441, 2006.

DOI: 10.1016/j.fusengdes.2006.07.065

[4] K. Bittner-Rohrhofer, "Characterization of reactor irradiated organic and inorganic hybrid insulation systems for fusion magnets," presented at the AIP Conference Proceedings, 2002.

DOI: 10.1063/1.1472551

[5] T. Hemmi et al., "Development of insulation technology with Cyanate Ester resins for ITER TF coils," Fusion Engineering and Design, vol. 84, no. 2-6, pp.923-927, 2009.

DOI: 10.1016/j.fusengdes.2009.01.083

[6] J. W. Li, Z. X. Wu, C. J. Huang, and L. F. Li, "Gamma irradiation effects on cyanate ester/epoxy insulation materials for superconducting magnets," (in English), Fusion Engineering and Design, Article; Proceedings Paper vol. 89, no. 12, pp.3112-3116, Dec 2014.

DOI: 10.1016/j.fusengdes.2014.09.012

[7] Z. X. Wu, R. J. Huang, C. J. Huang, and L. F. Li, "Properties of radiation stable insulation composites for fusion magnet," in Joint Meeting of the 1st Asian International Cryogenic Materials Conference (ICMC) / 50th Anniversary Conference of the Cryogenics-and-Superconductivity-Society-of-Japan (CSSJ), Kanazawa, JAPAN, 2016, vol. 897, BRISTOL: Iop Publishing Ltd, 2017.

DOI: 10.2221/jcsj.51.145

[8] P. E. Fabian, "Highly radiation-resistant vacuum impregnation resin systems for fusion magnet insulation," presented at the AIP Conference Proceedings, 2002.

DOI: 10.1063/1.1472555

[9] P. E. Fabian, N. A. Munshi, S. W. Feucht, K. Bittner-Rohrhofer, and H. W. Weber, "Low Temperature Mechanical Properties of Cyanate Ester Insulation Systems After Irradiation," American Institute of PhysicsAIP, 2004.

DOI: 10.1063/1.1774581

[10] N. A. Munshi et al., "Radiation Resistant Electrical Insulation Qualified for ITER TF Coils," IEEE Transactions on Applied Superconductivity, vol. 23, no. 3, pp.7700104-7700104, 2013.

DOI: 10.1109/tasc.2012.2231723

[11] S. J. Canfer et al., "Development of a filled resin system for the TF coils of ITER," Fusion Engineering and Design, vol. 86, no. 9-11, pp.2504-2507, 2011.

DOI: 10.1016/j.fusengdes.2011.04.040

[12] M. W. Hooker et al., "Industrialization of Radiation-Resistant Cyanate Ester Magnet Insulation," IEEE Transactions on Applied Superconductivity, vol. 19, no. 3, pp.2367-2370, 2009.

DOI: 10.1109/tasc.2009.2018749

[13] R. Prokopec et al., "Qualification of a cyanate ester epoxy blend supplied by Japanese industry for the ITER TF coil insulation," 2012.

DOI: 10.1063/1.4712086

[14] J. Hill et al., "Risk Mitigation for Cyanate Ester Insulation of Large Magnets Through Cure Optimization," IEEE Transactions on Applied Superconductivity, vol. 25, no. 3, pp.1-5, 2015.

DOI: 10.1109/tasc.2014.2376172