Effect of Intercalated Structure Antioxidant on Thermal Oxygen Stability of Polypropylene
Two layered composite metal hydroxides with intercalated structure antioxidants were added to polypropylene(PP)in a certain proportion using a twin-screw extrusion process to obtain inorganic-organic polymer composite material samples.The structure of the antioxidant hydrotalcite was characterized by X-ray diffraction(XRD)and Fourier transform infrared spectroscopy(FTIR).The effect of new antioxidants on the thermal oxidative stability of PP was investigated through oxidation induction time(OIT)and thermogravimetric(TG)analysis,and the effect of antioxidants on solvent migration resistance was also investigated.The results show that the addition of intercalated antioxidant can improve the thermal oxidative aging resistance of PP,and OIT of Mg-Al antioxidant is longer,Zn-Al antioxidant has a more significant effect on improving the thermal stability of PP.Compared with antioxidant 1010,intercalated structure antioxidants exhibit better migration resistance after soaking in ethanol and n-hexane.
polypropylenelayered composite metal hydroxidesantioxidantthermal oxygen stability
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