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Cui Y, Wang H, Pan H, Yan T, Zong C. The effect of mixed soft segment on the microstructure of thermoplastic polyurethane. J Appl Polym Sci 2021. [DOI: 10.1002/app.51346] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yongyin Cui
- School of Polymer Science and Engineering Qingdao University of Science and Technology Qingdao Shandong China
| | - Hairui Wang
- School of Polymer Science and Engineering Qingdao University of Science and Technology Qingdao Shandong China
| | - Hongwei Pan
- School of Polymer Science and Engineering Qingdao University of Science and Technology Qingdao Shandong China
| | - Tongtong Yan
- School of Polymer Science and Engineering Qingdao University of Science and Technology Qingdao Shandong China
| | - Chengzhong Zong
- School of Polymer Science and Engineering Qingdao University of Science and Technology Qingdao Shandong China
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2
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On the use of solubility parameters to investigate phase separation-morphology-mechanical behavior relationships of TPU. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122882] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Stribeck A, Eling B, Pöselt E, Malfois M, Schander E. Melting, Solidification, and Crystallization of a Thermoplastic Polyurethane as a Function of Hard Segment Content. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900074] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Almut Stribeck
- Institute of Technical and Macromolecular Chemistry Bundesstr. 45 20146 Hamburg Germany
| | - Berend Eling
- Institute of Technical and Macromolecular Chemistry Bundesstr. 45 20146 Hamburg Germany
- BASF Polyurethanes GmbH Elastogranstr. 60 49448 Lemförde Germany
| | - Elmar Pöselt
- BASF Polyurethanes GmbH Elastogranstr. 60 49448 Lemförde Germany
| | - Marc Malfois
- ALBA Synchrotron Light Source 08290 Cerdanyola del Vallès Catalonia Spain
| | - Edgar Schander
- BASF Polyurethanes GmbH Elastogranstr. 60 49448 Lemförde Germany
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Sokolova MP, Bugrov AN, Smirnov MA, Smirnov AV, Lahderanta E, Svetlichnyi VM, Toikka AM. Effect of Domain Structure of Segmented Poly(urethane-imide) Membranes with Polycaprolactone Soft Blocks on Dehydration of n-Propanol via Pervaporation. Polymers (Basel) 2018; 10:E1222. [PMID: 30961147 PMCID: PMC6290592 DOI: 10.3390/polym10111222] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 10/31/2018] [Accepted: 11/01/2018] [Indexed: 11/16/2022] Open
Abstract
Segmented poly(urethane-imide)s (PUIs) were synthesized by polyaddition reaction and applied for preparation of membranes. Tolylene-2,4-diisocyanate, pyromellitic dianhydride, and m-phenylenediamine for chain extension were used to form hard aromatic blocks. Polycaprolactone diols with molecular weights equal to 530 and 2000 g mol-1 were chosen as soft segments. The effect of the length of soft segments on the structure, morphology, and transport properties of segmented poly(urethane-imide) membranes were studied using atomic force microscopy, small-angle and wide-angle X-ray scattering, and pervaporation experiments. It was found that a copolymer with a shorter soft segment (530 g mol-1) consists of soft domains in a hard matrix, while the introduction of polycaprolactone blocks with higher molecular weight (2000 g mol-1) leads to the formation of hard domains in a soft matrix. Additionally, the introduction of hard segments prevents crystallization of polycaprolactone. Transport properties of membranes based on segmented PUIs containing soft segments of different length were tested for pervaporation of a model mixture of propanol/water with 20 wt % H₂O content. It was found that a membrane based on segmented PUIs containing longer soft segments demonstrates higher flux (8.8 kg μm m-2 h-1) and selectivity (179) toward water in comparison with results for pure polycaprolactone reported in literature. The membrane based on segmented PUIs with 530 g mol-1 soft segment has a lower flux (5.1 kg μm m-2 h-1) and higher selectivity (437).
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Affiliation(s)
- Maria P Sokolova
- Department of Chemical Thermodynamics & Kinetics, Saint Petersburg State University, Universitetsky pr. 26, Peterhof, Saint Petersburg 198504, Russia.
- Department of Physics, Lappeenranta University of Technology, Skinnarilankatu 34, 53850 Lappeenranta, Finland.
| | - Alexander N Bugrov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, Saint Petersburg 199004, Russia.
- Department of Physical Chemistry, Saint Petersburg Electrotechnical University "LETI", ul. Professora Popova 5, Saint Petersburg 197376, Russian.
| | - Michael A Smirnov
- Department of Chemical Thermodynamics & Kinetics, Saint Petersburg State University, Universitetsky pr. 26, Peterhof, Saint Petersburg 198504, Russia.
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, Saint Petersburg 199004, Russia.
| | - Alexander V Smirnov
- Faculty of Physics and Engineering, ITMO University, Kronverskiy pr. 49, Saint Petersburg 197101, Russia.
| | - Erkki Lahderanta
- Department of Physics, Lappeenranta University of Technology, Skinnarilankatu 34, 53850 Lappeenranta, Finland.
| | - Valentin M Svetlichnyi
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, Saint Petersburg 199004, Russia.
| | - Alexander M Toikka
- Department of Chemical Thermodynamics & Kinetics, Saint Petersburg State University, Universitetsky pr. 26, Peterhof, Saint Petersburg 198504, Russia.
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The Effects of Grafting and Crosslinking Aliphatic Dicarboxylic Acids onto Polyurethane on the Tensile Stress and Shape Recovery. Macromol Res 2018. [DOI: 10.1007/s13233-018-6105-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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6
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Scattering of X-rays during melting and solidification of thermoplastic polyurethane. Graphite as nucleating agent and stabilizer of the colloidal melt. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.08.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Li Y, Hu J, Niu C, Leng J, Li S. Thermoswitchable catalysis controlled by reversible dispersion/aggregation change of nanoreactors in the presence of α-CD polymers. NANOTECHNOLOGY 2018; 29:225501. [PMID: 29480812 DOI: 10.1088/1361-6528/aab238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The present work was aimed at preparing a thermosensitive nanoreactor system which could adjust its dispersion/aggregation status according to external temperature change to achieve the switchable catalysis. The mesoporous silica nanoparticle (MSNP) was selected as the framework material of the nanoreactor, and Ag nanoparticles were encapsulated in the mesoporous silica by an in situ reaction. Dodecyl groups were introduced onto MSNP surface, which could transform reversibly between complexation and disassociation with α-cyclodextrin (CD) cavity upon temperature change. It was found that the nanoreactors aggregated and the catalysis was effectively switched 'off' in the presence of CD polymers at low temperature (20 °C). However, when the temperature increased to 50 °C, the nanoreactors redispersed and catalysis successfully switched 'on'.
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Affiliation(s)
- Yinfeng Li
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
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