Pyrazole derivatives as polyethylene oxidative destruction stabilizers

The possibility of newly synthesized pyrazole derivatives using as heat stabilizers of high-pressure polyethylene (LDPE): 1-acetyl-4-methyl-3(5)-(2-(3-nitrophenyl)vinyl)-1H-pyrazole (additive 1) and 4benzoyl-3-(2-(4-nitrophenyl)vinyl-5-phenyl-1-tosyl-1H-pyrazole (additive 2)) has been studied. It is established that the introduction of additive 1 or 2 in the amount of 0,05-0,10 wt % to the high-pressure polyethylene leads to the increasing of such physical-mechanical properties of the samples as tensile strength by 1,2–1,5 times and elongation by 2,3–3,0 times in comparison with the unstabilized sample. Synthesized substances are more effective than Tioalkofen MBP used in industry