Preparation of nanosilica-immobilized antioxidant and the antioxidation effects in polypropylene
| Autor: | Baiyu Li, Yun Liu, Naipu He, Zaiman Liu |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Polypropylene
Aging property Melt mixing Antioxidant Materials science Polymers and Plastics General Chemical Engineering medicine.medical_treatment Organic Chemistry Induction time Grafting Matrix (chemical analysis) chemistry.chemical_compound chemistry Polymer chemistry medicine Nuclear chemistry |
| Zdroj: | Chinese Journal of Polymer Science. 32:1602-1609 |
| ISSN: | 1439-6203 0256-7679 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink