Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (3): 030304 doi: 10.13538/j.1001-8042/nst.26.030304

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

Irradiation and flame retardant effect of poly[bis(phenoxyphosphazene)] and magnesium hydroxide in LDPE composites

LI Jian-Xi ,1, 2 Zhang Cong ,1 CHEN Tao ,1 LI Lin-Fan ,1 and LI Jing-Ye 1   

  1. 1CAS Center for Excellence on TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2University of Chinese Academy of Sciences, Beijing 100049, China
  • Supported by:

    Supported by the “Strategic Priority Research Program” of the Chinese Academy of Sciences (No. XDA02040300)

LI Jian-Xi, Zhang Cong, CHEN Tao, LI Lin-Fan, and LI Jing-Ye . Irradiation and flame retardant effect of poly[bis(phenoxyphosphazene)] and magnesium hydroxide in LDPE composites.Nuclear Science and Techniques, 2015, 26(3): 030304     doi: 10.13538/j.1001-8042/nst.26.030304

Abstract:

Poly[bis(phenoxyphosphazene)] (PBPP) and magnesium hydroxide (MH) are used as a flame retardant blend with low-density polyethylene (LDPE) for the nuclear cable. This study aims to investigate the effects of PBPP in MH-LDPE blend composites on flame retardance and electron beam irradiation. The structure, morphology, and properties of the blend composites irradiated by an electron beam to different absorbed doses were characterized. The results indicated that PBPP provides lubrication during processing. As the PBPP content in the blend increases the melt flow rate at 20 phr MH, meaning the material is easier to process. The higher the PBPP content, the higher the limiting-oxygen index. The elongation at the break of the PBPP containing composites (at 50 phr MH) was evidently higher than the non-PBPP ones at different absorbed doses by electron beam irradiation. The thermogravimetric analysis results indicated that the improved mechanical property, resulting from electron-beam irradiation, could be attributed to the consumption of PBPP.

Key words: Flame retardant, Electron beam irradiation, Low-density polyethylene, Poly[bis(phenoxyphosphazene)], Magnesium hydroxide