Novel magnetic polyethylene nanocomposites produced by supported nanometre magnetic Ziegler-Natta catalyst
✍ Scribed by Wang, Li; Feng, Lin-Xian; Xie, Tao
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 97 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0959-8103
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✦ Synopsis
This paper describes the preparation of novel magnetic polyethylene nanocomposites using a nanometre magnetic Ziegler±Natta catalyst. It was found that novel magnetic polyethylene nanocomposites can be obtained according to the following four steps: (1) preparation of nanometre magnetic particles; (2) reaction between AlR 3 and hydroxyls on the surface of nanometre magnetic particles to form anchor points ÐAlR 2 ; (3) addition of TiCl 4 , Ti being coordinated to anchor points on the surface of nanometre magnetic particles to form polymerization active centres; (4) ethylene polymerization being carried out in situ on the surface of the nanometre magnetic particles to produce novel magnetic polyethylene nanocomposites. It is found that the activity of ethylene polymerization is essentially unaffected by polymerization temperature and polymerization time.