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Structure of the in situ Produced Polyethylene Based Composites Modified with Multi-Walled Carbon Nanotubes: In situ Synchrotron X-ray Diffraction and Differential Scanning Calorimetry Study Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Journal Composites Science and Technology
ISSN: 0266-3538
Output data Year: 2018, Volume: 167, Pages: 148-154 Pages count : 7 DOI: 10.1016/j.compscitech.2018.07.046
Tags Multi-walled carbon nanotubes; Polyethylene composites; In situ polymerization; Polymer crystallization; In situ synchrotron X-ray diffraction
Authors Kazakova Mariya A. 1,2 , Selyutin Alexander G. 1 , Semikolenova Nina V. 1 , Ishchenko Arcady V. 1,2 , Moseenkov Sergey I. 1 , Matsko Mikhail A. 1 , Zakharov Vladimir A. 1 , Kuznetsov Vladimir L. 1,2
Affiliations
1 Boreskov Institute of Catalysis, SB RAS, Lavrentieva 5, Novosibirsk, 630090, Russia
2 Novosibirsk State University, Pirogova 2, Novosibirsk, 630090, Russia

Funding (2)

1 Russian Foundation for Basic Research 17-73-20293
2 Ministry of Science and Higher Education of the Russian Federation ГЗ-2017-2020

Abstract: Polyethylene based composites modified with multi-walled carbon nanotubes (MWCNTs) were produced via in situ polymerization of ethylene with the Ti-Ziegler–Natta catalyst preliminarily immobilized on MWCNTs. The composite structure was characterized with transmission and scanning electron microscopy, differential scanning calorimetry (DSC) and in situ synchrotron X-ray Diffraction (in situ XRD). For the first time the Ti-containing catalyst species of the size 2–3 nm were observed on the MWСNTs surface stabilized in the polymer matrix. A comparative study of the melting-crystallization cycles of neat polyethylene (PE) and MWCNT-PE composites with in situ XRD and DSC provide information on the nucleation of PE crystals. For the first time, the in situ XRD technique was used for estimation of the coherent scattering region of PE blocks during the melting-crystallization cycles. These experiments and molecular dynamic modeling showed that MWCNTs act as the template for the PE chain orientation and as the nucleating agent for PE crystallization. However, the nucleation of PE crystals in composites occurs on the nanotube surface and also within the space between nanotubes. Thus, the relative volume of PE nucleated on nanotubes depends on their content in the composite and can be significant only for the composites with high nanotube loading.
Cite: Kazakova M.A. , Selyutin A.G. , Semikolenova N.V. , Ishchenko A.V. , Moseenkov S.I. , Matsko M.A. , Zakharov V.A. , Kuznetsov V.L.
Structure of the in situ Produced Polyethylene Based Composites Modified with Multi-Walled Carbon Nanotubes: In situ Synchrotron X-ray Diffraction and Differential Scanning Calorimetry Study
Composites Science and Technology. 2018. V.167. P.148-154. DOI: 10.1016/j.compscitech.2018.07.046 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: May 13, 2018
Accepted: Jul 31, 2018
Published online: Aug 1, 2018
Published print: Oct 1, 2018
Identifiers:
publication_identifier.wos_identifier_type WOS:000449137200017
publication_identifier.scopus_identifier_type 2-s2.0-85050891844
publication_identifier.rinz_identifier_type 35789636
publication_identifier.accession_number_identifier_type 2018:1450910
publication_identifier.chemical_accession_number_identifier_type 170:559888
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