Polymerization control and fast characterization of the stereo-defect distribution of heterogeneous Ziegler–Natta isotactic polypropylene
✍ Scribed by Jian Kang; Feng Yang; Tong Wu; Huilin Li; Ya Cao; Ming Xiang
- Book ID
- 113608444
- Publisher
- Elsevier Science
- Year
- 2012
- Tongue
- English
- Weight
- 744 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0014-3057
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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
## Abstract The stereosequence distribution in the heptane‐insoluble fraction of polypropene samples prepared with a number of MgCl~2~‐supported catalysts was analyzed in detail by means of ^13^CNMR. The results indicate that what is conventionally taken as “isotactic” polypropene is normally a ste