Journal of Radiation Research and Radiation Proces ›› 2017, Vol. 35 ›› Issue (5): 50303-050303.doi: 10.11889/j.1000-3436.2017.rrj.35.050303

• RADIATION CHEMISTRY • Previous Articles     Next Articles

Mechanical and flame retardant insulation properties of radiation-crosslinked on intumescent flame retardants/POE intumescent flame retardant material

LI Jiwei1, CHEN Junyu1, BAO Yiyi1, JIA Shaojin1, JIANG Pingkai2, LYU Yongkang1, WU Wei1, ZHOU Caihui3, LUO Chaohua4   

  1. 1 College of Environment and Chemical Engineering, Shanghai University, Shanghai 200444, China;
    2 Shanghai key lab of Electric Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China;
    3 Yadong special cable plant of Linhai, Linhai 317000, China;
    4 Dasheng Polymer Materials Co., Ltd. Suzhou 215000, China
  • Received:2017-05-31 Revised:2017-08-26 Online:2017-10-20 Published:2017-10-20

Abstract:

Ethylene-octene copolymer (POE) blended with different contents of intumescent flame retardants (ammonium polyphosphate, pentaerythritol, and melamine) was irradiated by electron beams to prepare flame retardant composite materials. The oxygen index, cone calorimeter, and combustion performance were used to characterize the flame retardant properties. The results showed that the tensile strength as well as the oxygen indices of the composites (about 1~2) increased and the elongation at break decreased with increasing absorbed doses. The combustion process of the composites shortened, and the heat and smoke release of the composites were more concentrated. After irradiation crosslinking at 200 kGy, the total heat release decreased from 94.8 MJ/m2 to 79.1 MJ/m2, the total amount of smoke release decreased from 1122.9 m2/m2 to 928.4 m2/m2, the combustion process reduced by about 25%, the CO release rate decreased from 0.062 2 kg/kg to 0.043 9 kg/kg, and the CO2 producing rate increased from 1.44 kg/kg to 1.51 kg/kg. Moreover, as the absorbed dose increased, the volume resistivity of the material varied slightly.

Key words: Electron beam, Radiation crosslinking, intumescent flame retardants, Mechanical properties, Oxygen Index, Heat release, Insulation properties

CLC Number: 

  • TL13