高分子量聚全氟乙丙烯(Fs-46)耐辐照性质的研究

本文针对聚全氟乙丙烯(Fs-46)树脂的耐辐照性质, 对照研究了普通Fs-46树脂与分子量大于20万Fs-46树脂的耐辐照及抗热老化性质。在190±2℃饱和水蒸汽0.2~3.0kPa压力下, 经(γ-射线(1×10^6库仑)照射后, 再于200℃经4320小时的热老化模拟试验, 后者机械强度基本不变, 前者的机械强度明显下降。结果表明分子量大于20万的Fs-46树脂具有比普通树脂Fs-46更好的耐辐照和抗热老化性能。

Study on the radiation resistance and resistance to heat deterioration of polyperfluoroethylene-propylenes with high molecular weight

The radiation resistance and resistance to heat deterioration between the commercial polyperfluoroethylene-propylene resin (Fs-46) and high molecular weight one (MW>2×10^5) were compared. The representative Fs-46 and high MW resin were treated by γ-radiation (1×10^6lu) under 0.2~3.0kPa of saturated steam at 190±2℃ for 8. 25h. and some samples after radiation treatment were then subjected to the heat deterioration at 200℃ for 4320h. It was found that the high MW copolymer can preserve the original mechanical properties while the commercial ones were destroyed. The high MW Fs-46 resin demonstrated its better properties of the radiation resistance and resistance to heat deterioration.