Vol.1 No.1 (May 2011)
Study on Thermal Oxidative Degradation Kinetics of the Blend of PA6-PP Ultra Fine Co-Powder and Natural Rubber
PA6-PP ultra fine co-powder was prepared by pan-milling method and the co-powder was blended with natural rubber latex through ultra sonic treating. The thermal oxidative degradation kinetics of the blend was studied in air atmosphere by thermo-gravimetric analysis(TG/TGA). The results show that，the thermal degradation reaction of the blend in air atmosphere is a two-stage reaction. The reaction order (n) of the thermo-oxidation reaction is 1.8. With the increment of the heating rate (β), the degradation temperature and degradation rate as well as the activation energy of reaction (E) increase linearly, but the maximum weight loss rate (CP)and the final weight loss rate (Cf) are not affected by β. Compared to pure NR, the initial degra-dation temperature (T0) and the apparent activation energy (E0) is lower but the maximum weight loss tem-perature (Tp) and final weight loss temperature (Tf) is higher. The vulcanization net and the thermo-oxidative radical reaction of the rubber are affected by the PA6-PP ultra fine co-powder added and the anti ther-mo-oxidative degradation property of the blend is improved.
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