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Citation: DENG Peng-Yang, SUN Jia-Zhen. Effect of Radiation on Poly (propylene carbonate)[J]. Chinese Journal of Applied Chemistry, ;2007, 24(3): 323-326. shu

Effect of Radiation on Poly (propylene carbonate)

DENG Peng-Yang ^a,b,, ,
SUN Jia-Zhen ^a

1.
a Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;
2.
b Graduate School of Chinese Academy of Sciences, Beijing

Corresponding author: DENG Peng-Yang,
Received Date: 29 June 2006
Available Online: 6 September 2006
Fund Project: 长春市科技基金资助项目(05GG57) (05GG57)

The radiation effect of poly(propylene carbonate)(PPC) has been studied under Co-60 and EB irradiation at room temperature. The molecular mass of PPC decreased with the increase of radiation dose. This result shows that PPC is a typical radiation degradable polymer. The degree of chain-scission G_s was estimated as G_s,γ-ray=10.81 and G_s,EB=4.9 for 1 mm PPC sheet under N₂ at room temperature. Different G_s values might come from O₂ effect in the radiation process. The degradation products were identified by IR spectra, the result shows that -OH group increased after radiation. With increasing absorb dose, the tensile strength and elongation at break decreased. However, as radiation sterilization dose is set in a range of 25~50 kGy, the remaining tensile strength of PPC is higher than 23 MPa, and elongation at break is longer than 4%. These results indicate that PPC can be safely sterilized by irradiation.
- poly(propylene carbonate),
- radiation degradation,
- IR spectra
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