电子束辐照HDPE/绢英粉体系的热氧化及光氧化稳定性研究

通过电子束辐照改善了HDPE与无机填料绢英粉（STC）的界面相互作用，制得了强度韧性兼优的材料，为了开发应用这一新材料，有必要对其热氧及光氧稳定性进行研究，本文研究了电子束辐照HDPE（e-HDPE)放置后效应及其对e-HDPE/STC共混体系力学性能的影响，。采用人工加速热氧化及光氧化的方法，对e-HDPE/STC共混体系的热氧化及光氧化稳定性进行了研究，研究结果表明，电子束辐照HDPE加入稳定剂并造粒后性能比较稳定，对e-HDPE/STC共混体系的力学性能基本无影响，在本试验条件下，e-HDPE/STC共混体系具有较好的热氧化及光氧化稳定性，经过168h热氧化或光氧化以后，拉伸强度变化不大，冲击强度保持率分别为93％及84％。

A STUDY ON THE THERMAL AND LIGHT OXIDATION STABILITY OF ELECTRON BEAM IRRADIATED HDPE/STC BLEND

Some oxygen containing groups (mainly C=O group) are formed on the molecular chain of HDPE during electron beam irradiation in air. The affinity between HDPE and sericite tridymite cristobabite (STC), and the mechanical properties of HDPE/STC blend are improved quite a lot owing to the polar groups introduced. For the further application of the high performance polyethylene material, the post irradiation oxidation effects of e HDPE on the mechanical properties of e HDPE/STC blend, and the thermal & light oxidation stability of the blend were studied through FT IR, TGA and mechanical property test, the experimental results showed that after adding some stabilizer, the properties of e HDPE are stable during storage. The e HDPE/STC blend has good thermal and light oxidation stability, after thermal or light oxidizing for 168h, the tensile strength of the blend changes little, and the retention percentage of impact strength are 93% and 84% respectively.