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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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Zhang Z, Kang X, Jiang Y, Cai Z, Li S, Cui D. Access to Disentangled Ultrahigh Molecular Weight Polyethylene via a Binuclear Synergic Effect. Angew Chem Int Ed Engl 2023; 62:e202215582. [PMID: 36418237 DOI: 10.1002/anie.202215582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/21/2022] [Accepted: 11/23/2022] [Indexed: 11/25/2022]
Abstract
Disentangled ultrahigh molecular weight polyethylene (dis-UHMWPE) has excellent processability but can be achieved under extreme conditions. Herein, we report ethylene polymerization with the binuclear half-sandwich scandium complexes C1-Sc2 and C2-Sc2 to afford UHMWPE. C1-Sc2 bearing a short linker shows higher activity and gives higher molecular weight PEs than C2-Sc2 containing a flexible spacer and the mononuclear Sc1 . Strikingly, all UHMWPEs isolated from C1-Sc2 under broad temperature range (25-120 °C) and wide ethylene pressures (2-13 bar) feature very low degree of entanglement as proved by rheological test, DSC annealing study and SEM. These dis-UHMWPEs are facilely mediated solid-state-process at 130 °C and their tensile strength and modulus reach up to 149.2 MPa and 1.5 GPa, respectively. DFT simulations reveal that the formation of dis-UHMWPE is attributed to the binuclear synergic effect and the agostic interaction between the active center and the growing chain.
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Affiliation(s)
- Zhen Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022, Changchun, China.,Department of Materials Science and Engineering, Jilin University, 130022, Changchun, China
| | - Xiaohui Kang
- College of Pharmacy, Dalian Medical University, 116044, Dalian, China
| | - Yang Jiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022, Changchun, China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, 230026, Hefei, China
| | - Zhongyi Cai
- Department of Materials Science and Engineering, Jilin University, 130022, Changchun, China
| | - Shihui Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022, Changchun, China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, 230026, Hefei, China
| | - Dongmei Cui
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022, Changchun, China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, 230026, Hefei, China
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Wu SL, Qiao J, Guan J, Chen HM, Wang T, Wang C, Wang Y. Nascent disentangled UHMWPE: Origin, synthesis, processing, performances and applications. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Metallocene Polyolefins Reinforced by Low-Entanglement UHMWPE through Interfacial Entanglements. ADVANCES IN POLYMER TECHNOLOGY 2022. [DOI: 10.1155/2022/9344096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
By introducing low-entanglement UHMWPE, the mechanical properties of polyolefins are improved to varying degrees. For polypropylene, the lack of interaction between UHMWPE and polypropylene results in an unsatisfactory reinforcement effect, and the disentangled state makes it easier for the particles to form defects driven by a chain explosion. In contrast, regarding polyethylene and elastomer containing ethylene segments, low-entanglement UHMWPE plays a better role in reinforcement. A series of measurements including scanning electron microscopy (SEM), rheological measurements, differential scanning calorimetry (DSC), and mechanical measurement were used to investigate the mechanisms for the different enhancement effects. It originates from interdiffusion and entanglement forming of polyethylene segments across the interface, endowing the material with different aggregated and defect structures. For instance, EPDM possesses a higher optimal dosage of UHMWPE particles reflected in good interfacial interdiffusion with UHMWPE particles, leading to significant optimized mechanical performance.
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Cardoso PM, Ueki MM, Barbosa JDV, Barbosa WT, Lazarus B, Azevedo JB. Development and Characterization of LLDPE Blends with Different UHMWPE Concentrations Obtained by Hot Pressing. Polymers (Basel) 2022; 14:polym14183723. [PMID: 36145867 PMCID: PMC9501252 DOI: 10.3390/polym14183723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/23/2022] [Accepted: 08/30/2022] [Indexed: 11/29/2022] Open
Abstract
To modify its characteristics, expand its applicability, and, in some cases, its processability, new blends using ultra-high-molecular-weight polyethylene (UHMWPE) have been developed. In this study, three different formulations of linear low-density polyethylene (LLDPE) and UHMWPE blends were prepared with 15, 30, and 45% (% w/w) UHMWPE in the LLDPE matrix. All mixtures were prepared by hot pressing and were immersed in water for one hour afterwards at a controlled temperature of 90 °C to relieve the internal stresses that developed during the forming process. The thermal characterization showed that the blends showed endothermic peaks with different melting temperatures, which may be the result of co-crystallization without mixing between the polymers during the forming process. The mechanical characteristics presented are typical of a ductile material, but with the increase in the percentage of UHMWPE, there was a decrease in the ductility of the blends, as the elongation at rupture of the blends was higher than that of the pure components. The morphologies observed by SEM indicate that there were two phases in the blends. This is the result of the system’s immiscibility due to the mode of preparation of the blends, wherein the two polymers may not have mixed intimately, confirming the results found with the thermal analyses.
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Affiliation(s)
- Pollyana Melo Cardoso
- Department of Materials, University Center Senai Cimatec, Salvador 41650-010, Bahia, Brazil
- Graduate Program in Materials Science and Engineering—P2CEM, Federal University of Sergipe (UFS), Aracaju 49100-000, Sergipe, Brazil
- Pós-Graduate Program PPGGETEC, University Center Senai Cimatec, Salvador 41650-010, Bahia, Brazil
| | - Marcelo Massayoshi Ueki
- Graduate Program in Materials Science and Engineering—P2CEM, Federal University of Sergipe (UFS), Aracaju 49100-000, Sergipe, Brazil
| | - Josiane Dantas Viana Barbosa
- Pós-Graduate Program PPGGETEC, University Center Senai Cimatec, Salvador 41650-010, Bahia, Brazil
- Correspondence: ; Tel.: +55-7198-868-3231
| | - Willams Teles Barbosa
- Pós-Graduate Program PPGGETEC, University Center Senai Cimatec, Salvador 41650-010, Bahia, Brazil
| | - Benjamin Lazarus
- Materials Science and Engineering Program, University of California San Diego, San Diego, CA 92093, USA
| | - Joyce Batista Azevedo
- Institute of Science, Technology and Innovation, Federal University of Bahia, Salvador 42809-000, Bahia, Brazil
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Yang B, Wang S, Ding M, Wang C, Lv C, Wang Y, Yang Y, Zhang N, Shi Z, Qian J, Xia R, Fang Y. Hierarchical structure and properties of
high‐density
polyethylene (
HDPE
) microporous films fabricated via
thermally‐induced
phase separation (
TIPS
): Effect of presence of
ultra‐high
molecular weight polyethylene (
UHMWPE
). POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Bin Yang
- School of Chemistry & Chemical Engineering, Key Laboratory of Environment‐Friendly Polymeric Materials of Anhui Province Anhui University Hefei Anhui People's Republic of China
- Anhui Zhongding Sealing Parts Co., Ltd., Key Laboratory of High‐Performance Rubber and Products of Anhui Province Ningguo Anhui China
| | - Shun Wang
- School of Chemistry & Chemical Engineering, Key Laboratory of Environment‐Friendly Polymeric Materials of Anhui Province Anhui University Hefei Anhui People's Republic of China
| | - Mengya Ding
- ChangXin Memory Technologies Co, Ltd. Hefei Anhui People's Republic of China
| | - Chengjun Wang
- School of Chemistry & Chemical Engineering, Key Laboratory of Environment‐Friendly Polymeric Materials of Anhui Province Anhui University Hefei Anhui People's Republic of China
| | - Cheng Lv
- School of Chemistry & Chemical Engineering, Key Laboratory of Environment‐Friendly Polymeric Materials of Anhui Province Anhui University Hefei Anhui People's Republic of China
| | - Yang Wang
- School of Chemistry & Chemical Engineering, Key Laboratory of Environment‐Friendly Polymeric Materials of Anhui Province Anhui University Hefei Anhui People's Republic of China
| | - Yuqing Yang
- School of Chemistry & Chemical Engineering, Key Laboratory of Environment‐Friendly Polymeric Materials of Anhui Province Anhui University Hefei Anhui People's Republic of China
| | - Nuo Zhang
- School of Chemistry & Chemical Engineering, Key Laboratory of Environment‐Friendly Polymeric Materials of Anhui Province Anhui University Hefei Anhui People's Republic of China
| | - Zhiqiang Shi
- School of Chemistry & Chemical Engineering, Key Laboratory of Environment‐Friendly Polymeric Materials of Anhui Province Anhui University Hefei Anhui People's Republic of China
- Anhui Zhongding Sealing Parts Co., Ltd., Key Laboratory of High‐Performance Rubber and Products of Anhui Province Ningguo Anhui China
| | - Jiasheng Qian
- School of Chemistry & Chemical Engineering, Key Laboratory of Environment‐Friendly Polymeric Materials of Anhui Province Anhui University Hefei Anhui People's Republic of China
| | - Ru Xia
- School of Chemistry & Chemical Engineering, Key Laboratory of Environment‐Friendly Polymeric Materials of Anhui Province Anhui University Hefei Anhui People's Republic of China
| | - Yirong Fang
- Longteng Security & Surveillance Technology Co, Ltd. Lu'an Anhui People's Republic of China
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Zhang Y, Di Y, Ye C, Zhang L, Tang X, Shu B, Yan X, Li W, Wang J, Yang Y. Morphology evolution and mechanical property enhancement of linear low‐density polyethylene by adding disentangled ultrahigh molecular weight polyethylene. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yu Zhang
- Department of Polymer Science and Engineering, School of Material Science and Chemical Engineering Ningbo University Ningbo Zhejiang China
- Ningbo Research Institute Zhejiang University Ningbo China
| | - Yutao Di
- Ningbo Research Institute Zhejiang University Ningbo China
| | - Chunlin Ye
- State Key Laboratory of Polyolefins and Catalysis, Shanghai Key Laboratory of Catalysis Technology for Polyolefins Shanghai Research Institute of Chemical Industry Co., Ltd. Shanghai China
| | - Letian Zhang
- State Key Laboratory of Polyolefins and Catalysis, Shanghai Key Laboratory of Catalysis Technology for Polyolefins Shanghai Research Institute of Chemical Industry Co., Ltd. Shanghai China
| | - Xin Tang
- Department of Polymer Science and Engineering, School of Material Science and Chemical Engineering Ningbo University Ningbo Zhejiang China
- Ningbo Research Institute Zhejiang University Ningbo China
| | - Baoqiang Shu
- Ningbo Research Institute Zhejiang University Ningbo China
| | - Xiang Yan
- Ningbo Research Institute Zhejiang University Ningbo China
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering Zhejiang University Hangzhou China
| | - Wei Li
- Department of Polymer Science and Engineering, School of Material Science and Chemical Engineering Ningbo University Ningbo Zhejiang China
- Ningbo Research Institute Zhejiang University Ningbo China
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering Zhejiang University Hangzhou China
| | - Jingdai Wang
- Ningbo Research Institute Zhejiang University Ningbo China
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering Zhejiang University Hangzhou China
| | - Yongrong Yang
- Ningbo Research Institute Zhejiang University Ningbo China
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering Zhejiang University Hangzhou China
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Enhancing Chain Mobility of Ultrahigh Molecular Weight Polyethylene by Regulating Residence Time under a Consecutive Elongational Flow for Improved Processability. Polymers (Basel) 2021; 13:polym13132192. [PMID: 34209419 PMCID: PMC8271948 DOI: 10.3390/polym13132192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 06/27/2021] [Accepted: 06/28/2021] [Indexed: 11/16/2022] Open
Abstract
Improving the processability of ultrahigh molecular weight polyethylene (UHMWPE) and understanding the effect of the polymeric chain mobility has long been a challenging task. Herein, we show that UHMWPE without any processing aids can be processed at a lower temperature of 180 °C compared to conventional processing temperatures (~250 °C) under a continuous elongational flow (CEF) by using an eccentric rotor extruder (ERE). By probing the effect of the residence time of UHMWPE samples under a CEF on the morphology, rheological behavior and molecular orientation, we find that the long polymer chains of UHMWPE are apt to orientate under a consecutive volume elongational deformation, thereby leading to a higher residual stress for the extruded sample. Meanwhile, the residence time of samples can regulate the polymeric chain mobility, giving rise to the simultaneous decrease of the melting defects and residual stress as well as Hermans orientation function with increasing residence time from 0 to 60 s. This also engenders the enhanced diffusion of UHMWPE segments, resulting in a defect-free morphology and higher entanglement with lower crystallinity but without causing obvious thermal oxidative degradation of UHMWPE. This interesting result could originate from the fast chain entanglement and particle welding enabled by a desirably short residence time, which could be explained by the empirical, entropy-driven melting explosion mechanism.
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Hong R, Jiang YX, Leng J, Liu MJ, Shen KZ, Fu Q, Zhang J. Synergic Enhancement of High-density Polyethylene through Ultrahigh Molecular Weight Polyethylene and Multi-flow Vibration Injection Molding: A Facile Fabrication with Potential Industrial Prospects. CHINESE JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1007/s10118-021-2545-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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