Application of Fractionation Techniques to the Study of Olefin Polymerization Kinetics and Polymer Degradation |
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| Authors: | Hisayuki Nakatani Hitoshi Matsuoka Shoutarou Suzuki Toshiaki Taniike Liu Boping Minoru Terano |
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| Affiliation: | 1. Kitami Institute of Technology, Koen-cho, Kitami, Hokkaido, 090-8507, Japan;2. Tsukuba Research Laboratories, Tokuyama Corporation, 40, Wadai, Tsukuba-shi, Ibaraki, 300-4247, Japan;3. Japan Advanced Institute of Science & Technology, Nomi, Ishikawa, 923-1292, Japan |
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| Abstract: | Summary: Temperature rising elution fractionation (TREF) has been regarded as a powerful technique for study of semicrystalline polymers. In this paper, two examples of unique applications of TREF were introduced. One was the study on the influence of extraction of internal donor on the variation of isospecific active sites of a MgCl2- supported Ziegler catalyst, and the other was the estimation of the relationship between polymer micro-tacticity and degradation rate of isotactic polypropylene (iPP). The former example revealed the conversion from high to low isospecific site by the extraction of internal donors, whereas the latter showed a negative correlation between the level of isotacticity and the degradation rate. These results demonstrated that TREF was useful in these research applications. |
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| Keywords: | catalyst degradation fractionation polymers isotactic polypropylene |
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