Journal of Radiation Research and Radiation Processing ›› 2019, Vol. 37 ›› Issue (1): 10101-010101.doi: 10.11889/j.1000-3436.2019.rrj.37.010101

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Research progress in preparation of cross-linked polypropylene foam using supercritical CO2

YANG Chenguang1,2(),XING Zhe1,TAN Hairong1,WU Guozhong1()   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2018-11-19 Revised:2018-12-06 Accepted:2018-12-06 Online:2019-02-20 Published:2019-01-30
  • Contact: Guozhong WU;
  • About author:YANG Chenguang (male) was born in April 1988, and received his bachelor’s degree from Zhengzhou University in June 2014. Now he is a Ph.D. candidate at Shanghai Institute of Applied physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences. E-mail:|Ph.D. WU Guozhong, professor,
  • Supported by:
    Supported by National Defense Fundamental Science Research Nuclear Science Challenge Program (TZ2018004)


Manufacture of microcellular plastic foams using supercritical CO2 foaming technology has attracted considerable research attention from industries, owing to its numerous excellent advantages like efficient foaming, environmental preservation, good mechanical performance of polymer foam, and good appearance of finished products. Because the melt strength of some types of polymers (e.g. polypropylene (PP)) is very low, i.e. they are easy to rupture and collapse, the mechanical properties of the obtained foams are poor. Radiation cross-linking can change the polymer from a 2-dimensional structure to a 3-dimensional network structure, significantly improving its melt strength, and making it favorable for foaming using supercritical CO2. Hence, radiation technology has great application potential in supercritical CO2 foaming of polymers. This paper briefly summarized the characteristics of PP foaming using supercritical CO2 and the application of radiation cross-linking in the same.

Key words: Polypropylene (PP), Supercritical CO2, Radiation cross-linking, Foaming, Mechanical property

CLC Number: 

  • TL13