Citation: Zai-man Liu, Yun Liu, Nai-pu He, Bai-yu Li. Preparation of Nanosilica-immobilized Antioxidant and the Antioxidation Effects in Polypropylene[J]. Chinese Journal of Polymer Science, ;2014, 32(12): 1602-1609. doi: 10.1007/s10118-014-1553-3 shu

Preparation of Nanosilica-immobilized Antioxidant and the Antioxidation Effects in Polypropylene

Zai-man Liu ^1,, ,
Yun Liu ¹ ,
Nai-pu He ¹ ,
Bai-yu Li ¹

1.
School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

Corresponding author: Zai-man Liu,
Received Date: 5 March 2014
Revised Date: 21 April 2014

To improve the dispersion of silica in polypropylene (PP) matrix and to avoid physical loss of the antioxidants, nanosilica with dendric polyamidoamines on the surface (SG-PAMAM) was synthesized by using divergent method. Then nanosilica-immobilized antioxidant (SG-PAMAM-AO) was prepared by grafting 2,6-di-tert-butyl-4-aminophenol which was derived from 2,6-di-tert-butyl-4-phenol (AO). The SG-PAMAM-AO was added into PP by melt mixing to study the aging property. The oxidation induction time of PP/SG-PAMAM-AO and PP/AO compounds was measured. It was found that the antioxidant property of the SG-PAMAM-AO was superior to that of AO. According to the changes of carbonyl absorption before and after photo-thermal aging, the photo-thermal oxidative stability of PP/SG-PAMAM-AO was much higher than that of PP, PP/SG-PAMAM and PP/AO.
- Silica,
- Antioxidant,
- Polypropylene,
- Antioxidant behavior
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