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利用共辐照法将４（甲基丙烯酸）２，２，６，６四甲基哌啶醇酯（ＴＭＰＭ）接枝共聚在聚丙烯上。研究不同条件对接枝率的影响。研究表明在苯、四氯化碳和石油醚等溶剂中接枝率比在其它溶剂中要高；在氩气中辐照的接枝率比在空气中的高。在苯中，接枝率在１０～６０ｋＧｙ的范围内呈线性增长，大于６０ｋＧｙ出现偏低；在ＣＣｌ４中，接枝率在１０～５０ｋＧｙ的范围内呈线性增长，大于５０ｋＧｙ出现偏低。在０～２．８５ｍｏｌ／Ｌ的浓度范围内接枝率随单体浓度的增加而增加，只有在浓度低于１１４ｍｏｌ／Ｌ时接枝率随浓度增长较快。添加阻聚剂的样品接枝率比不添加阻聚剂的低，在低剂量时相差较大，随着剂量的增大，这种差别越来越小。研究接枝ＴＭＰＭ对聚丙烯耐辐射稳定性能的影响，发现添加接枝共聚物的聚丙烯比添加未接枝的ＴＭＰＭ的聚丙烯更耐辐射。
Using a total irradiation 4 (methyl methacrylate) 2,2,6,6 tetramethylpiperidinol ester (TMPM) graft copolymerized polypropylene. The effects of different conditions on the grafting rate were studied. Studies have shown that the grafting rate in solvents such as benzene, carbon tetrachloride and petroleum ether is higher than in other solvents; the irradiation rate in argon is higher than in air. In benzene, the grafting rate increased linearly in the range of 10 ~ 60kGy, while it was lower than 60kGy. In CCl4, the grafting rate increased linearly in the range of 10 ~ 50kGy, but lower than 50kGy. In the concentration range of 0 ~ 2.85mol / L, the grafting rate increased with the increase of monomer concentration, and the grafting rate increased rapidly with the concentration only when the concentration was lower than 114mol / L. The polymerization rate of samples with polymerization inhibitor added is lower than that without polymerization inhibitor, and the difference between the two groups is larger at low dose. As the dose increases, the difference is smaller and smaller. The effect of grafted TMPM on the radiation-resistant stability of polypropylene was studied. It was found that the polypropylene with the graft copolymer was more resistant to radiation than the polypropylene with the non-grafted TMPM.