Studies on the preparation of new magnetic polyolefins using nanometer magnetic Ziegler–Natta catalyst
✍ Scribed by L. Wang; L. X. Feng; S. L. Yang
- Book ID
- 101253335
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 111 KB
- Volume
- 71
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
Nanometer magnetic particles were prepared through oxidizing Fe 2ϩ in basic solution. Initially, using resultant nanometer magnetic powder as support, supported nanometer magnetic Ziegler-Natta catalysts were obtained. Through polymerization in situ on the surface of nanometer magnetic particles, a new kind of magnetic polyolefin that is different from both the composite plastics' magnet and the structure plastics' magnet was obtained.
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A study of the effect of polymerization temperature on the microtacticity of poly(propy1ene) prepared using various MgClz-supported catalysts has shown that, in almost all cases, an increase in temperature leads not only to higher proportions of isotactic polymer but also to increased stereoregu1ari