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Citation: WANG Hui-Liang, WANG Chun, CHEN Wen-Xiu. Effect of HALS and Antioxidants on Coloration of PE[J]. Chinese Journal of Applied Chemistry, ;2001, 18(7): 548-551. shu

Effect of HALS and Antioxidants on Coloration of PE

1.
Department of Chemistry, Beijing Normal University, Beijing 100875

Received Date: 24 August 2000
Available Online: 2 January 2001
Fund Project:

The effects of some hindered amine light stabilizers(HALS) and antioxidants on the radiation-induced coloration of polyethylene(PE) are studied by measuring the yellowness index(YI) of PE.It is found that all the HALS and antioxidants examined are effective in preventing PE from radiation-induced coloration.The YIs of PE with pentamethyl HALS(PMPM, PPMPM) are a little higher than YIs of PE added corresponding tetramethyl HALS(TMPM, PTMPM) when the irradiation dose is lower than 100 kGy, but when the irradiation dose is higher than 100 kGy, the YI of PE added pentamethyl HALS is low.Pentamethyl HALS is more effective in preventing PE from radiation-induced coloration when irradiation dose is high.The YI of PE added Irganox 1010 is the highest among those of PE added hindered phenol antioxidant Irganox 1076, Irganox 1010 or Irganox 1098 separately.The YI of PE added Irganox PS802 is lower than that of PE added Irgafos 168.Commonly, hindered phenol antioxidants are more effective than hydroperoxide decomposer antioxidants in preventing PE from radiation-induced coloration.The role of HALS and antioxidants played in preventing PE from radiation-induced coloration is discussed.
- polyethylene,
- radiation-induced coloration,
- hindered amine light stabilizer,
- antioxidant
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