Comparative Study of Distribution of Active Sites According to Their Stereospecificity in Propylene Polymerization over the Traditional TiCl3 and Supported Titanium-Magnesium Catalysts with Different Composition Full article
| Journal |
Macromolecular Chemistry and Physics
ISSN: 1022-1352 , E-ISSN: 1521-3935 |
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| Output data | Year: 2018, Volume: 219, Number: 5, Article number : 1700488, Pages count : 9 DOI: 10.1002/macp.201700488 | ||||
| Tags | Fractionation of polymers, Molecular weight distribution/molar mass distribution, Poly(propylene) (PP), Ziegler-Natta polymerization | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | The Ministry of Education and Science of the Russian Federation | |
| 2 | Federal Agency for Scientific Organizations | 0303-2016-0009 |
Abstract:
The preparative-temperature rising elution fractionation method is used to obtain comparative data on contents of fractions with different microtacticities for polypropylene (PP) samples prepared using three catalytic systems: the traditional Ziegler–Natta (Z–N) catalyst δ-TiCl3 and two types of supported titanium–magnesium catalysts: the “donor-free” TiCl4/MgCl2 catalyst and TiCl4/MgCl2·nDBP catalyst (DBP – dibutylphthalate used as an internal donor) at polymerization with the same cocatalyst (AlEt3) in the absence and presence of an external donor (propyltrimetoxy silane). The separated individual PP fractions are also studied by gel permeation chromatography (molecular weight and molecular weight distribution) and differential scanning calorimetry. The results demonstrate general regularities and differences in the formation of active sites having different isospecificities for the traditional TiCl3-based Z–N catalyst and highly active supported titanium–magnesium catalysts.
Cite:
Nikolaeva M.
, Matsko M.
, Zakharov V.
Comparative Study of Distribution of Active Sites According to Their Stereospecificity in Propylene Polymerization over the Traditional TiCl3 and Supported Titanium-Magnesium Catalysts with Different Composition
Macromolecular Chemistry and Physics. 2018. V.219. N5. 1700488 :1-9. DOI: 10.1002/macp.201700488 WOS Scopus РИНЦ AN OpenAlex
Comparative Study of Distribution of Active Sites According to Their Stereospecificity in Propylene Polymerization over the Traditional TiCl3 and Supported Titanium-Magnesium Catalysts with Different Composition
Macromolecular Chemistry and Physics. 2018. V.219. N5. 1700488 :1-9. DOI: 10.1002/macp.201700488 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Sep 27, 2017 |
| Accepted: | Nov 16, 2017 |
| Published online: | Jan 15, 2018 |
| Published print: | Mar 1, 2018 |
Identifiers:
| Web of science: | WOS:000426736300007 |
| Scopus: | 2-s2.0-85040653293 |
| Elibrary: | 35491184 |
| Chemical Abstracts: | 2018:88385 |
| OpenAlex: | W2783376850 |