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

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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. / Nikolaeva, Marina; Matsko, Mikhail; Zakharov, Vladimir.

In: Macromolecular Chemistry and Physics, Vol. 219, No. 5, 1700488, 01.03.2018.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{e2b73f9b906b4a219d1051e09d7f712a,

title = "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",

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.",

keywords = "fractionation of polymers, molecular weight distribution/molar mass distribution, poly(propylene) (PP), Ziegler–Natta polymerization, Ziegler-Natta polymerization, MICROSTRUCTURAL ANALYSIS, ZIEGLER-NATTA CATALYST, molar mass distribution, molecular weight distribution, DONORS, HYDROGEN, RISING ELUTION FRACTIONATION, KINETICS",

author = "Marina Nikolaeva and Mikhail Matsko and Vladimir Zakharov",

year = "2018",

month = mar,

day = "1",

doi = "10.1002/macp.201700488",

language = "English",

volume = "219",

journal = "Macromolecular Chemistry and Physics",

issn = "1022-1352",

publisher = "Wiley-Blackwell",

number = "5",

}

RIS

TY - JOUR

T1 - 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

AU - Nikolaeva, Marina

AU - Matsko, Mikhail

AU - Zakharov, Vladimir

PY - 2018/3/1

Y1 - 2018/3/1

N2 - 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.

AB - 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.

KW - fractionation of polymers

KW - molecular weight distribution/molar mass distribution

KW - poly(propylene) (PP)

KW - Ziegler–Natta polymerization

KW - Ziegler-Natta polymerization

KW - MICROSTRUCTURAL ANALYSIS

KW - ZIEGLER-NATTA CATALYST

KW - molar mass distribution

KW - molecular weight distribution

KW - DONORS

KW - HYDROGEN

KW - RISING ELUTION FRACTIONATION

KW - KINETICS

UR - http://www.scopus.com/inward/record.url?scp=85040653293&partnerID=8YFLogxK

U2 - 10.1002/macp.201700488

DO - 10.1002/macp.201700488

M3 - Article

AN - SCOPUS:85040653293

VL - 219

JO - Macromolecular Chemistry and Physics

JF - Macromolecular Chemistry and Physics

SN - 1022-1352

IS - 5

M1 - 1700488

ER -

ID: 10426403