中子对氟聚合物力学性能的影响

Neutron irradiation effects on mechanical properties of fluoropolymers

对中子辐照前后氟聚合物 F2311和 F2314的静态力学性能、动态力学性能以及分子量进行了考察。结果表明,经注量为 1.5×1013/ cm2的中子辐照后,F2311和 F2314的静态力学性能稍有增强,分子量变化不大;F2311的动态力学性能基本不变,F2314的储存模量和损耗模量却有所降低,经注量为 2.5×1013/ cm2的中子辐照后,F2311的静态力学性能和 F2314的拉伸性能明显增强,F2314的压缩性能反而降低;F2311的动态力学性能基本不变,F2314的储存模量和损耗模量却明显减小。

Fluoropolymers F2311 and F2314 samples were irradiated by neutrons of 1.23 MeV in average energy up to fluences of 1.5×1013/cm2 and 2.5×1013/cm2, and their static and dynamic mechanical properties and molecular weight were determined. It indicated that static mechanical properties of the F2311 samples and tensile intensity of the F2314 samples increased with the neutron fluence, whereas compression intensity of the F2314 samples decreased with the neutron fluence. Molecular weight of both the fluoropolymers increased with the neutron fluence. Little changes were found with dynamical properties of the F2311 samples, whereas dynamical properties of the F2314 samples decreased with the neutron fluence.