2026-10-14T23:25:35Z https://www.scidb.cn/oai

10.57760/sciencedb.j00203.0002p 2026-09-29T14:59:28Z

2026-09-29 The influence of triallyl isocyanurate on the oxidative cracking behavior of polypropylene under electron beam irradiation doi:10.57760/sciencedb.j00203.0002p en To reveal the structural and property degradation mechanisms of modified polypropylene (PP) under electron-beam irradiation, triallyl isocyanurate-modified PP (J-PP) sheets were investigated in this work. The effects of electron-beam irradiation at doses of 0, 50, 100, 150 and 200 kGy on its surface morphology, chemical structure, thermal properties and mechanical properties were studied. Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC) and tensile tests were employed for characterization. The results show that the surface of irradiated modified PP gradually becomes rough. The carbonyl absorption peak near 1716 cm-1 intensifies with increasing absorbed dose, indicating progressive oxidation of PP. Both tensile strength and elongation at break of J-PP decrease significantly as the absorbed dose rises. After 200 kGy irradiation, the two parameters drop from 32.76 MPa and 674.80 % to 24.02 MPa and 3.10 %, representing reductions of 26.68 % and 99.54 %, respectively. DSC results demonstrate that the melting-peak temperature, melting enthalpy and crystallinity of J-PP generally decrease while the crosslinking degree increases with higher absorbed dose. The crystallization temperature increases slightly at low absorbed doses but declines at high doses. Electron-beam irradiation simultaneously induces oxidative degradation of PP molecular chains. The cross-linked network formed with the assistance of TAIC can partially offset the adverse effect of chain scission on the load-bearing capacity of the material, yet it cannot effectively suppress the loss of plasticity caused by high-dose irradiation. This paper provides a reference for reliability evaluation and optimization of radiation-crosslinking modification processes for PP materials under electron-irradiation environments. Electron beam irradiation; Polypropylene; TAIC; Radiation cross-linking; Oxidative degradation; Mechanical properties Shi Congcong Lu Yifeng zuo hong mei Yan Lesan Xiong Chuanxi PUBLIC https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset Science Data Bank