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Borisov A, Boiko Y, Gureva S, Danilova K, Egorov V, Ivan’kova E, Marikhin V, Myasnikova L, Novokshonova L, Radovanova E, Starchak E, Ushakova T, Yagovkina M. A New Approach to Estimating the Parameters of Structural Formations in HDPE Reactor Powder. Polymers (Basel) 2023; 15:3742. [PMID: 37765596 PMCID: PMC10534811 DOI: 10.3390/polym15183742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/04/2023] [Accepted: 09/09/2023] [Indexed: 09/29/2023] Open
Abstract
The morphology of virgin reactor powder (RP) of high-density polyethylene (HDPE) with MW = 160,000 g/mol was investigated using DSC, SEM, SAXS, and WAXS methods. The morphological SEM analysis showed that the main morphological units of RP are macro- and micro-shish-kebab structures with significantly different geometric dimensions, as well as individual lamellae of folded chain crystals. A quantitative analysis of an asymmetric SAXS reflection made it possible to reveal the presence of several periodic morphoses in the RP with long periods ranging from 20 nm to 60 nm, and to correlate them with the observed powder morphology. According to the DSC crystallinity data, the thickness of the lamellae in each long period was estimated. Their surface energy was calculated in the framework of the Gibbs-Thompson theory. The presence of regular and irregular folds on the surface of different shish-kebab lamellae was discussed. The percentage of identified morphoses in the RP was calculated. It has been suggested that the specific structure of HDPE RP is due to the peculiarity of polymer crystallization during suspension synthesis in a quasi-stationary regime, in which local overheating and inhomogeneous distribution of shear stresses in a chemical reactor are possible.
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Affiliation(s)
- Artem Borisov
- Laboratory of Physics of Strength, Ioffe Institute, Polytechnicheskaya St. 26, St. Petersburg 194021, Russia; (A.B.); (S.G.); (K.D.); (V.E.); (V.M.); (E.R.); (M.Y.)
| | - Yuri Boiko
- Laboratory of Physics of Strength, Ioffe Institute, Polytechnicheskaya St. 26, St. Petersburg 194021, Russia; (A.B.); (S.G.); (K.D.); (V.E.); (V.M.); (E.R.); (M.Y.)
| | - Svetlana Gureva
- Laboratory of Physics of Strength, Ioffe Institute, Polytechnicheskaya St. 26, St. Petersburg 194021, Russia; (A.B.); (S.G.); (K.D.); (V.E.); (V.M.); (E.R.); (M.Y.)
| | - Ksenia Danilova
- Laboratory of Physics of Strength, Ioffe Institute, Polytechnicheskaya St. 26, St. Petersburg 194021, Russia; (A.B.); (S.G.); (K.D.); (V.E.); (V.M.); (E.R.); (M.Y.)
| | - Victor Egorov
- Laboratory of Physics of Strength, Ioffe Institute, Polytechnicheskaya St. 26, St. Petersburg 194021, Russia; (A.B.); (S.G.); (K.D.); (V.E.); (V.M.); (E.R.); (M.Y.)
| | - Elena Ivan’kova
- Institute of Macromolecular Compounds, Bol’shoy pr. 31, St. Petersburg 199004, Russia;
| | - Vyacheslav Marikhin
- Laboratory of Physics of Strength, Ioffe Institute, Polytechnicheskaya St. 26, St. Petersburg 194021, Russia; (A.B.); (S.G.); (K.D.); (V.E.); (V.M.); (E.R.); (M.Y.)
| | - Liubov Myasnikova
- Laboratory of Physics of Strength, Ioffe Institute, Polytechnicheskaya St. 26, St. Petersburg 194021, Russia; (A.B.); (S.G.); (K.D.); (V.E.); (V.M.); (E.R.); (M.Y.)
| | - Ludmila Novokshonova
- Semenov Institute of Chemical Physics, Kosygina St. 4, Building 1, Moscow 119991, Russia; (L.N.); (E.S.); (T.U.)
| | - Elena Radovanova
- Laboratory of Physics of Strength, Ioffe Institute, Polytechnicheskaya St. 26, St. Petersburg 194021, Russia; (A.B.); (S.G.); (K.D.); (V.E.); (V.M.); (E.R.); (M.Y.)
| | - Elena Starchak
- Semenov Institute of Chemical Physics, Kosygina St. 4, Building 1, Moscow 119991, Russia; (L.N.); (E.S.); (T.U.)
| | - Tatiana Ushakova
- Semenov Institute of Chemical Physics, Kosygina St. 4, Building 1, Moscow 119991, Russia; (L.N.); (E.S.); (T.U.)
| | - Maria Yagovkina
- Laboratory of Physics of Strength, Ioffe Institute, Polytechnicheskaya St. 26, St. Petersburg 194021, Russia; (A.B.); (S.G.); (K.D.); (V.E.); (V.M.); (E.R.); (M.Y.)
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All-polyethylene compositions of ultrahigh molecular weight polyethylene (UHMWPE) synthesized in one-step ethylene polymerization with combinations of zirconocene and iron-based catalysts. IRANIAN POLYMER JOURNAL 2023. [DOI: 10.1007/s13726-023-01141-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Qihua Zhou, Fang S, Li N, Cao X, Fan S, Wang X. Synthesis of Ultrahigh-Molecular-Weight Polyethylene with [OSNO]-type Bis(phenolate) Titanium Complexes. POLYMER SCIENCE SERIES B 2022. [DOI: 10.1134/s1560090422700440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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