Journal of Radiation Research and Radiation Proces ›› 2017, Vol. 35 ›› Issue (4): 40303-040303.doi: 10.11889/j.1000-3436.2017.rrj.35.040303

• RADIATION CHEMISTRY • Previous Articles     Next Articles

Thermostability and tensile-property of ultra-high molecular weight polyethylene/modified illite-smectite interstratified clay minerals composites irradiated by g-rays

DONG Penggang1,3, CHEN Youshuang2, TANG Zhongfeng1, LIANG Xingquan3, LIN Baofeng3   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Science, Jiading Campus, Shanghai 201800, China;
    2. Department of Biological and Chemical engineering, Guangxi University of Technology, Liuzhou 545006, China;
    3. College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
  • Received:2017-04-25 Revised:2017-07-10 Online:2017-08-20 Published:2017-07-29
  • Supported by:

    Supported by the "Strategic Priority Research Program" of the Chinese Academy of Sciences(No. XDA02020000), the National Natural Science Foundation of China (No. 11505268) and Natural Science Foundation of Shanghai (No.15ZR1448600)

Abstract:

The ultra-high molecular weight polyethylene/modified illite-smectite interstratified clay minerals composites (UHMWPE/M-ISIC) prepared by melt blending were irradiated by g-rays with a dose of 75 kGy in air and N2 atmosphere, respectively. The results showed that the tensile strength of UHMWPE/M-ISIC increased at first and then decreased with the increasing content of M-ISIC, and reached its maximum value within mass percent of 1% of M-ISIC. The thermal stability of UHMWPE after irradiation in air decreased significantly, while that of UHMWPE/M-ISIC decreased slightly. The thermal stabilities of neither material showed obvious changes after irradiation in N2 atmosphere. The crystallinity of UHMWPE after irradiation in air increased significantly, but decreased in N2 atmosphere, while that of UHMWPE/M-ISIC decreased after irradiation in both air and N2 atmosphere. The gel content and creep resistance of UHMWPE/M-ISIC after irradiation in air were higher than those of UHMWPE, and lower in N2 atmosphere. The results indicate that the M-ISIC irradiated in air could reduce the cracking by decreasing the diffusion rate of oxygen and thus promote the crosslinking effect. However, the crosslinking is hindered in N2 atmosphere as the free activity of the molecular chain is hindered.

Key words: Illite-smectite interstratified clay minerals, UHMWPE (Ultra-high molecular weight polyethylene), Composites, Tensile-property, Thermal stability, Irradiation

CLC Number: 

  • TL13