Effect of AlEt3 and an External Donor on the Distribution of Active Sites According to Their Stereospecificity in Propylene Polymerization over TiCl4/MgCl2 Catalysts with Different Titanium Content Full article
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Macromolecular Chemistry and Physics
ISSN: 1022-1352 , E-ISSN: 1521-3935 |
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| Output data | Year: 2016, Volume: 217, Number: 12, Pages: 1384-1395 Pages count : 12 DOI: 10.1002/macp.201500486 | ||||
| Tags | fractionation of polymers, isotactic, poly(propylene) (PP), Ziegler–Natta polymerization | ||||
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Funding (1)
| 1 | Federal Agency for Scientific Organizations | V.44.2.1. |
Abstract:
The data on content of individual fractions with different microtacticity for poly(propylene) (PP) samples produced over titanium–magnesium catalysts (TMCs) with composition TiCl4/MgCl2 and different titanium contents (0.1 and 3.5 wt%), as well as on the effects of pretreatment of these catalysts with triethylaluminum and addition of an external electron donor to the polymerization reaction on the content of these fractions are obtained using preparative temperature rising elution fractionation. The TMC with low titanium content is found to contain more than 90% of aspecific sites and an insignificant number of sites with low isospecificity (IS1) and isospecific sites (IS2). Pretreatment of catalysts with triethylaluminum increases the contents of the IS1 and IS2 sites. Addition of an external donor results in a more noticeable increase in the contents of IS1 and IS2 sites and formation of highly isospecific IS3 sites. The data on molecular weight and thermophysical properties of individual PP fractions with different microtacticity produced over catalysts with different compositions are obtained.
Cite:
Nikolaeva M.
, Mikenas T.
, Matsko M.
, Zakharov V.
Effect of AlEt3 and an External Donor on the Distribution of Active Sites According to Their Stereospecificity in Propylene Polymerization over TiCl4/MgCl2 Catalysts with Different Titanium Content
Macromolecular Chemistry and Physics. 2016. V.217. N12. P.1384-1395. DOI: 10.1002/macp.201500486 WOS Scopus РИНЦ ANCAN OpenAlex
Effect of AlEt3 and an External Donor on the Distribution of Active Sites According to Their Stereospecificity in Propylene Polymerization over TiCl4/MgCl2 Catalysts with Different Titanium Content
Macromolecular Chemistry and Physics. 2016. V.217. N12. P.1384-1395. DOI: 10.1002/macp.201500486 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Nov 13, 2015 |
| Accepted: | Feb 5, 2016 |
| Published online: | May 4, 2016 |
| Published print: | Jun 1, 2016 |
Identifiers:
| Web of science: | WOS:000380018700008 |
| Scopus: | 2-s2.0-84975122076 |
| Elibrary: | 27135725 |
| Chemical Abstracts: | 2016:727161 |
| Chemical Abstracts (print): | 165:31727 |
| OpenAlex: | W2345532132 |