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Tan MWM, Thornton PM, Thangavel G, Bark H, Dauskardt R, Lee PS. Toughening Self-Healing Elastomers with Chain Mobility. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2308154. [PMID: 38867394 DOI: 10.1002/advs.202308154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 02/04/2024] [Indexed: 06/14/2024]
Abstract
Enhancing fracture toughness and self-healing within soft elastomers is crucial to prolonging the operational lifetimes of soft devices. Herein, it is revealed that tuning the polymer chain mobilities of carboxylated-functionalized polyurethane through incorporating plasticizers or thermal treatment can enhance these properties. Self-healing is promoted as polymer chains gain greater mobility toward the broken interface to reassociate their bonds. Raising the temperature from 80 to 120 °C, the recovered work of fracture is increased from 2.86 to 123.7 MJ m-3. Improved fracture toughness is realized through two effects. First, strong carboxyl hydrogen bonds dissipate large energies when broken. Second, chain mobilities enable the redistribution of localized stress concentrations to allow crack blunting, enlarging the size of dissipation zones. At optimal conditions of plasticizers (3 wt.%) or temperature (40 °C) to promote chain mobilities, fracture toughness improves from 16.3 to 19.9 and 25.6 kJ m-2, respectively. Insights of fracture properties at healed soft interfaces are revealed through double cantilever beam tests. These measurements indicate that fracture mechanics play a critical role in delaying complete failure at partial self-healing. By imparting optimal polymer chain mobilities within tough and self-healing elastomers, effective prevention against damage and better recovery are realized.
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Affiliation(s)
- Matthew Wei Ming Tan
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
- Singapore-HUJ Alliance for Research and Enterprise (SHARE), Smart Grippers for Soft Robotics (SGSR), Campus for Research Excellence and Technological Enterprise (CREATE), Singapore, 138602, Singapore
| | | | - Gurunathan Thangavel
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Hyunwoo Bark
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Reinhold Dauskardt
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Pooi See Lee
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
- Singapore-HUJ Alliance for Research and Enterprise (SHARE), Smart Grippers for Soft Robotics (SGSR), Campus for Research Excellence and Technological Enterprise (CREATE), Singapore, 138602, Singapore
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2
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Yu L, Yu Z, Yang L, Wen S, Zhang ZX. Development of thermoplastic polyether ester elastomer microcellular foam with high resilience: Effect of chain extension on foaming behavior and mechanical properties. J Appl Polym Sci 2023. [DOI: 10.1002/app.53912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Affiliation(s)
- Leilei Yu
- Key Laboratory of Rubber–Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber–Plastics Qingdao University of Science and Technology 266042 Qingdao China
- State Key Laboratory of Marine Coatings Marine Chemical Research Institute Co. Ltd. 266100 Qingdao China
| | - Zhen Yu
- Key Laboratory of Rubber–Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber–Plastics Qingdao University of Science and Technology 266042 Qingdao China
| | - Lijuan Yang
- Key Laboratory of Rubber–Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber–Plastics Qingdao University of Science and Technology 266042 Qingdao China
| | - Shibao Wen
- Key Laboratory of Rubber–Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber–Plastics Qingdao University of Science and Technology 266042 Qingdao China
| | - Zhen Xiu Zhang
- Key Laboratory of Rubber–Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber–Plastics Qingdao University of Science and Technology 266042 Qingdao China
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3
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Su C, Bi TT, Yang ZG. Failure Analysis of Abnormal Cracking of the Track Circuit Reader Antenna Baffle for High-Speed Trains. MATERIALS (BASEL, SWITZERLAND) 2023; 16:722. [PMID: 36676457 PMCID: PMC9861645 DOI: 10.3390/ma16020722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/06/2023] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
The track circuit reader (TCR) is an important part of train control systems. This paper reports a failure of the TCR antenna baffle, which is used to prevent the TCR antenna from being struck by foreign objects. The designed service life of the baffle is 4.8 million kilometers, but serious cracking was found during routine maintenance after only 0.67 million kilometers of operation. In order to avoid the hidden danger brought by the incident to the safe operation of the train, it is necessary to conduct a complete failure analysis of the failed TCR antenna baffle. Therefore, a comprehensive investigation of the base material, cleaning agents, crack morphologies, etc., was carried out, and the failure environment of the antenna baffle was verified by experiment. The final results show that the environmental stress cracking is the root cause of the failed antenna baffle, and the multiple bubbles produced by the formed process of the antenna baffle are another important cause. According to the conclusions, the solutions to prevent the reoccurrence of such failures are proposed. After these solutions are adopted, the number of failed antenna baffles is greatly reduced, which fully proves the correctness of this analysis.
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Jung YS, Woo J, Lee E, Lee S, Shin EJ. Synthesis and properties of bio-based thermoplastic poly(ether urethane) for soft actuators. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03375-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
AbstractIn this study, bio-based thermoplastic polyurethane (TPU) for use in soft actuators is bio-based poly(ether-urethane) made using fermented corn, along with bio-derived compounds such as propane-1,3-diol (PDO) as a chain extender. Bio-based TPUs were obtained through a solvent-free one-shot synthesis method, and the effects of varying the [NCO]/[OH] molar ratio and type of isocyanates on chemical structure, thermal stability, and mechanical properties were investigated. The degree of phase separation (DPS) and state of hard segment (HS) / soft segment (SS) of TPU are important factors affecting the thermal and physical properties of the prepared film. These properties depend on the [NCO]/[OH] molar ratio and the type of isocyanates used for polymerization. The results showed that, when aromatic isocyanate was used, the degree of separation of the HS/SS was improved as the molar ratio increased. The average molecular weight and DPS as well as thermal and mechanical properties of 1-isocyanato-4-[(4-isocyanatophenyl)methyl]benzene (MDI)-based TPU samples are all higher than those of 1,1’-methylenebis(4-isocyanatocyclohexane) (H12MDI)-based TPU samples in spite of the lower HS content. These findings of this study are expected to contribute to the preparation of fused deposition modeling (FDM) 3D printing or 4D printing for shape memory polymer from bio-based TPU filaments for use in soft actuators with a shore hardness range of 59~84A.
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TRANSFORMATION OF TPU ELASTOMERS INTO TPU FOAMS USING SUPERCRITICAL CO2. A NEW REPROCESSING APPROACH. J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2022.105806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Dong H, Wang Y, Fan M, Zhao J, Zhang Z, Zhang J. Synthesis and properties of multi-block thermoplastic polyurethanes constructed with polystyrene and poly(butylene adipate) sequences. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03271-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Development of thermoplastic vulcanizates based on in situ synthesized thermoplastic polyurethane and acrylonitrile-butadiene rubber: the influence of the curing system. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03176-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AbstractWe prepared different thermoplastic elastomers (TPEs) using an internal mixer. We investigated the properties of thermoplastic polyurethanes (TPUs) produced from prepolymers with various isocyanate content and two different chain extenders to select the most appropriate TPU matrix for preparing thermoplastic vulcanizates (TPVs). Based on the results, we selected a prepolymer with moderate isocyanate content (10%) and the more flexible 1,6-hexanediol as a chain extender and prepared TPVs by dynamic vulcanization with in situ produced TPU. The rubber phase was acrylonitrile-butadiene rubber (NBR) with peroxidic and sulfuric curing with different accelerators. Dynamical mechanical analysis (DMA) results show that the room temperature storage modulus of the TPVs decreases due to the rubber phase. The TPU/NBR-CBS TPV with delayed action accelerator yields the highest tensile and tear strength and elongation at break. TPU/NBR-DCP made with a peroxide-based rubber blend shows similar tensile strength with significantly lower elongation at break and tear strength. The good mechanical properties of TPU/NBR-CBS can be explained by the long induction period, which allowed the rubber phase to disperse before vulcanization took place. In the TPU/NBR-DCP, the peroxide formed bonds not only in the rubber phase but also between the rubber and TPU phases, which is manifested in the high mixing torque and the result of the thermogravimetric analysis (TGA).
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Jiang J, Zhou M, Li Y, Chen B, Tian F, Zhai W. Cell structure and hardness evolutions of TPU foamed sheets with high hardness via a temperature rising foaming process. J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2022.105654] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Jiang J, Liu F, Chen B, Li Y, Yang X, Tian F, Xu D, Zhai W. Microstructure development of PEBA and its impact on autoclave foaming behavior and inter-bead bonding of EPEBA beads. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Ates M, Karadag S, Eker AA, Eker B. Polyurethane foam materials and their industrial applications. POLYM INT 2022. [DOI: 10.1002/pi.6441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Murat Ates
- Atespolymer Research group, Department of Chemistry, Faculty of Arts and Sciences Tekirdag Namik Kemal University, Degirmenalti Campus, 59030, Tekirdag Turkey
- Nanochem Polymer Energy Company, Silahtaraga Mh., University 1st street, Number: 13/1 Z102, Tekirdag Turkey
| | - Selin Karadag
- Atespolymer Research group, Department of Chemistry, Faculty of Arts and Sciences Tekirdag Namik Kemal University, Degirmenalti Campus, 59030, Tekirdag Turkey
| | - Aysegul Akdogan Eker
- Department of Mechanical Engineering, Faculty of Engineering Yildiz Technical University, 34349, Besiktas Istanbul Turkey
| | - Bulent Eker
- Department of Biosystem Engineering, Faculty of Agriculture Tekirdag Namik Kemal University, 59030, Tekirdag Turkey
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11
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Gunasekaran HB, Ponnan S, Zheng Y, Laroui A, Wang H, Wu L, Wang J. Facile Fabrication of Highly Sensitive Thermoplastic Polyurethane Sensors with Surface- and Interface-Impregnated 3D Conductive Networks. ACS APPLIED MATERIALS & INTERFACES 2022; 14:22615-22625. [PMID: 35506598 DOI: 10.1021/acsami.2c03351] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This research aims to develop a practical, scalable, and highly conductive flexible 3D printed piezoresistive sensor with low filler content. Here, we introduced a fused deposition modeling 3D printing combined in situ spray-coating technique to develop a conductive sensor in a single shot. The graphene suspension is sprayed over each layer during the 3D printing of the sensor, which helps develop a conductive network on the surface and at the interface of the printed system. Graphene deposited on the overall surface is often affected by nanoparticle delamination and loses its function over time. To avoid this, the prepared samples are subjected to foaming. The foaming process created a low-mass-density sensor by forming a microcellular structure, and the surface-deposited graphene is embedded well on the TPU surface. The method followed in this work reveals a stable and connected conduction path with excellent electrical resistance and resistance against harsh conditions (exposure to organic solvents). Besides, the compression sensor withstood its sensitivity over a severe compressive strain of 80% and showed a GF of 1.82 and a sensitivity of 2.316 kPa-1. The conductive network path varied based on the infill pattern, affecting its electrical sensitivity. The wiggle pattern shows good resistance; under stretching, the pattern generated a higher current and showed a delayed conductive path disconnection than other patterns. Thus, the embedded graphene/TPU conductive sensors show good stability and promising sensitivity. Furthermore, the developed sensor is used to monitor human motion and actions.
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Affiliation(s)
- Harini Bhuvaneswari Gunasekaran
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Sathiyanathan Ponnan
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China
- Key Lab for Sport Shoes Upper Materials of Fujian Province, Fujian Huafeng New Materials Co., Ltd., Putian, Fujian 351164, People's Republic of China
| | - Yanling Zheng
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
- Fujian College, University of Chinese Academy of Sciences, Fuzhou 350002, China
| | - Abdelatif Laroui
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Haopeng Wang
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, People's Republic of China
| | - Lixin Wu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, People's Republic of China
| | - Jianlei Wang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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12
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Supercritical CO2 foaming and shrinkage resistance of thermoplastic polyurethane/modified magnesium borate whisker composite. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.101887] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Effect of the crystallization of modified polybutylene terephthalate on its foaming using supercritical CO2: Transition from microcellular to nanocellular foam. J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2021.105463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Xu Z, Wang G, Zhao J, Zhang A, Zhao G. Super-elastic and structure-tunable poly(ether-block-amide) foams achieved by microcellular foaming. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2021.101807] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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15
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Jiang J, Liu F, Yang X, Xiong Z, Liu H, Xu D, Zhai W. Evolution of ordered structure of TPU in high-elastic state and their influences on the autoclave foaming of TPU and inter-bead bonding of expanded TPU beads. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123872] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Aguiar R, Miller RE, Petel OE. Microstructural evidence of the toughening mechanisms of polyurethane reinforced with halloysite nanotubes under high strain-rate tensile loading. Sci Rep 2021; 11:13161. [PMID: 34162992 PMCID: PMC8222351 DOI: 10.1038/s41598-021-92663-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 06/11/2021] [Indexed: 11/09/2022] Open
Abstract
In this study, we have investigated the relationship between the spherulitic morphology and the dynamic tensile response of polyurethane reinforced with Halloysite nanotubes (HNTs). The polyurethane prepolymer is partially silane end-capped and filled with only 0.8 wt.% of acid-treated Halloysite nanotubes. The resultant nanocomposite material presents a 35% higher spall strength compared to the neat polyurethane and 21% higher fracture toughness. We show evidence that the HNTs are not the toughening phase in the nanocomposite, but rather it is their influence on the resultant spherulitic structures which alters the polymer microstructure and leads to a tougher dynamic response. Microstructural characterization is performed via Scanning Electron Microscopy, Atomic Force Microscopy and Field Emission Scanning Electron Microscopy, and crystallinity examination via X-ray diffraction. The spherulitic structures present a brittle fracture character, while the interspherulitic regions are more ductile and show large deformation. The nanocomposite presents a finer and more rigid spherulitic structure, and a more energy dissipative fracture mechanism characterized by a rougher fracture surface with highly deformed interspherulitic regions.
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Affiliation(s)
- Rafaela Aguiar
- Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, ON, K1S 5B6, Canada
| | - Ronald E Miller
- Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, ON, K1S 5B6, Canada.
| | - Oren E Petel
- Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, ON, K1S 5B6, Canada
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17
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Effect of extrusion on the foaming behavior of thermoplastic polyurethane with different hard segments. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02604-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Evolution of cell morphology from sub-macroscale to nanoscale in modified thermoplastic polyether ester elastomer via supercritical CO2 foaming. J Supercrit Fluids 2021. [DOI: 10.1016/j.supflu.2021.105186] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Pournaghshband Isfahani A, Shahrooz M, Yamamoto T, Muchtar A, Ito MM, Yamaguchi D, Takenaka M, Sivaniah E, Ghalei B. Influence of microstructural variations on morphology and separation properties of polybutadiene-based polyurethanes. RSC Adv 2021; 11:15449-15456. [PMID: 35424034 PMCID: PMC8698806 DOI: 10.1039/d1ra00764e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/19/2021] [Indexed: 12/01/2022] Open
Abstract
Polybutadiene-based polyurethanes with different cis/trans/1,2-vinyl microstructure contents are synthesized. The phase morphology and physical properties of the polymers are investigated using spectroscopic analysis (FTIR and Raman), differential scanning calorimetry (DSC), X-ray scattering (WAXD and SAXS) and atomic force microscopy (AFM). In addition, their gas transport properties are determined for different gases at 4 bar and 25 °C. Thermodynamic incompatibility and steric hindrance of pendant groups are the dominant factors affecting the morphology and properties of the PUs. FTIR spectra, DSC, and SAXS analysis reveal a higher extent of phase mixing in high vinyl-content PUs. Moreover, the SAXS analysis and AFM phase images indicate smaller microdomains by increasing the vinyl content. Smaller permeable soft domains as well as the lower phase separation of the PUs with higher vinyl content create more tortuous pathways for gas molecules and deteriorate the gas permeability of the membranes.
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Affiliation(s)
- Ali Pournaghshband Isfahani
- Institute for Integrated Cell-Materials Sciences (iCeMS), Kyoto University Yoshida-Honmachi, Sakyo-ku 606-8501 Kyoto Japan
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
| | - Mahdi Shahrooz
- Institute for Sustainable Industries and Liveable Cities, Victoria University 14428 Melbourne VIC Australia
| | - Takuma Yamamoto
- Institute for Integrated Cell-Materials Sciences (iCeMS), Kyoto University Yoshida-Honmachi, Sakyo-ku 606-8501 Kyoto Japan
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
| | - Ansori Muchtar
- Institute for Integrated Cell-Materials Sciences (iCeMS), Kyoto University Yoshida-Honmachi, Sakyo-ku 606-8501 Kyoto Japan
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
| | - Masateru M Ito
- Institute for Integrated Cell-Materials Sciences (iCeMS), Kyoto University Yoshida-Honmachi, Sakyo-ku 606-8501 Kyoto Japan
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
| | - Daisuke Yamaguchi
- Institute for Integrated Cell-Materials Sciences (iCeMS), Kyoto University Yoshida-Honmachi, Sakyo-ku 606-8501 Kyoto Japan
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
| | - Mikihito Takenaka
- Institute for Integrated Cell-Materials Sciences (iCeMS), Kyoto University Yoshida-Honmachi, Sakyo-ku 606-8501 Kyoto Japan
- Institute for Chemical Research, Kyoto University Gokasho, Uji Kyoto 611-0011 Japan
| | - Easan Sivaniah
- Institute for Integrated Cell-Materials Sciences (iCeMS), Kyoto University Yoshida-Honmachi, Sakyo-ku 606-8501 Kyoto Japan
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
| | - Behnam Ghalei
- Institute for Integrated Cell-Materials Sciences (iCeMS), Kyoto University Yoshida-Honmachi, Sakyo-ku 606-8501 Kyoto Japan
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
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20
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Wang Y, Rong H, Zhang X, Chen Y, Luo W, Liu Y, Yao W, Tian Y. Influences of Bu‐NENA and BDNPA/F Plasticizers on the Properties of Binder for High‐Energy NEPE Propellants. PROPELLANTS EXPLOSIVES PYROTECHNICS 2021. [DOI: 10.1002/prep.202000228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yalun Wang
- School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 People's Republic of China
| | - Hui Rong
- Key Laboratory of Cluster Science Ministry of Education of China School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 People's Republic of China
| | - Xiuhui Zhang
- Key Laboratory of Cluster Science Ministry of Education of China School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 People's Republic of China
| | - Yu Chen
- School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 People's Republic of China
| | - Wen Luo
- Research Institute Liaoning Qingyang Special Chemical Engineering Co., Ltd. Liaoyang 111002 People's Republic of China
| | - Yunfei Liu
- School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 People's Republic of China
| | - Weishang Yao
- School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 People's Republic of China
| | - Ye Tian
- School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 People's Republic of China
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21
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Affiliation(s)
- Wentao Zhai
- School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou, Guangdong Province, China
| | - Junjie Jiang
- School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou, Guangdong Province, China
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province, China
| | - Chul B. Park
- Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, Canada
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22
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Amirkhosravi M, Yue L, Ju T, Manas-Zloczower I. Designing thermal annealing to control mechanical performance of thermoplastic polyurethane elastomers. POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123254] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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23
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Batı B, Küçük EB, Durmuş A, Nofar M. Microcellular foaming behavior of ether- and ester-based TPUs blown with supercritical CO2. JOURNAL OF POLYMER ENGINEERING 2020. [DOI: 10.1515/polyeng-2020-0014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The bead foaming behavior of ether- and an ester-based Tensor Processing Unit (TPU) resins were investigated in a lab-scale reactor using supercritical CO2 as the blowing agent. The samples were saturated at various saturation temperatures and the effects of hard segment crystallization during the saturation on the foaming behavior of the TPU samples were explored. The results revealed that the different HS crystallization tendencies and possible CO2 solubility differences in two TPU grades led to their different foaming behaviors. The ester-based TPU could be foamed within a wider saturation temperature range and revealed an easier cell growth and foam expansion while the ether-based TPU showed a more limited cell growth behavior and hence processing window. The effect of pre-annealing and hence the isothermally induced HS crystallization on the foaming behavior of the ether-based TPU and the influence of depressurization rate on the foaming behavior of ester-based TPU was also explored.
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Affiliation(s)
- Bige Batı
- Polymer Science and Technology Program, Institute of Science and Technology, Istanbul Technical University , Maslak , Istanbul , 34469 , Turkey
| | - Emine Büşra Küçük
- Polymer Science and Technology Program, Institute of Science and Technology, Istanbul Technical University , Maslak , Istanbul , 34469 , Turkey
| | - Ali Durmuş
- Department of Chemical Engineering, Faculty of Engineering , Istanbul University-Cerrahpasa , Avcılar , Istanbul , 34320 , Turkey
| | - Mohammadreza Nofar
- Polymer Science and Technology Program, Institute of Science and Technology, Istanbul Technical University , Maslak , Istanbul , 34469 , Turkey
- Metallurgical and Materials Engineering Department, Faculty of Chemical and Metallurgical Engineering , Istanbul Technical University , Maslak , Istanbul , 34469 , Turkey
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Nofar M, Batı B, Küçük EB, Jalali A. Effect of soft segment molecular weight on the microcellular foaming behavior of TPU using supercritical CO2. J Supercrit Fluids 2020. [DOI: 10.1016/j.supflu.2020.104816] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Zheng H, Pan G, Huang P, Xu D, Zhai W. Fundamental Influences of Crosslinking Structure on the Cell Morphology, Creep Property, Thermal Property, and Recycling Behavior of Microcellular EPDM Foams Blown with Compressed CO2. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b05611] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Hao Zheng
- School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, Guangdong Province 510275, China
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, China
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Ge Pan
- State Key Lab of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Pengke Huang
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, China
| | - Donghua Xu
- State Key Lab of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Wentao Zhai
- School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, Guangdong Province 510275, China
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26
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Xiao SP, Huang HX. Generation of nanocellular TPU/reduced graphene oxide nanocomposite foams with high cell density by manipulating viscoelasticity. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121879] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Nofar M, Büşra Küçük E, Batı B. Effect of hard segment content on the microcellular foaming behavior of TPU using supercritical CO2. J Supercrit Fluids 2019. [DOI: 10.1016/j.supflu.2019.104590] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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28
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Kohári A, Halász IZ, Bárány T. Thermoplastic Dynamic Vulcanizates with In Situ Synthesized Segmented Polyurethane Matrix. Polymers (Basel) 2019; 11:polym11101663. [PMID: 31614744 PMCID: PMC6836004 DOI: 10.3390/polym11101663] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 10/07/2019] [Accepted: 10/09/2019] [Indexed: 11/16/2022] Open
Abstract
The aim of this paper was the detailed investigation of the properties of one-shot bulk polymerized thermoplastic polyurethanes (TPUs) produced with different processing temperatures and the properties of thermoplastic dynamic vulcanizates (TDVs) made by utilizing such in situ synthetized TPUs as their matrix polymer. We combined TPUs and conventional crosslinked rubbers in order to create TDVs by dynamic vulcanization in an internal mixer. The rubber phase was based on three different rubber types: acrylonitrile butadiene rubber (NBR), carboxylated acrylonitrile butadiene rubber (XNBR), and epoxidized natural rubber (ENR). Our goal was to investigate the effect of different processing conditions and material combinations on the properties of the resulting TDVs with the opportunity of improving the interfacial connection between the two phases by chemically bonding the crosslinked rubber phase to the TPU matrix. Therefore, the matrix TPU was synthesized in situ during compounding from diisocyanate, diol, and polyol in parallel with the dynamic vulcanization of the rubber mixture. The mechanical properties were examined by tensile and dynamical mechanical analysis (DMTA) tests. The morphology of the resulting TDVs was studied by atomic force microscopy (AFM) and scanning electron microscopy (SEM) and the thermal properties by differential scanning calorimetry (DSC). Based on these results, the initial temperature of 125 °C is the most suitable for the production of TDVs. Based on the atomic force micrographs, it can be assumed that phase separation occurred in the TPU matrix and we managed to evenly distribute the rubber phase in the TDVs. However, based on the SEM images, these dispersed rubber particles tended to agglomerate and form a quasi-continuous secondary phase where rubber particles were held together by secondary forces (dipole–dipole and hydrogen bonding) and can be broken up reversibly by heat and/or shear. In terms of mechanical properties, the TDVs we produced are on a par with commercially available TDVs with similar hardness.
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Affiliation(s)
- Andrea Kohári
- Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary.
| | - István Zoltán Halász
- Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary.
| | - Tamás Bárány
- Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary.
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29
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Jiang X, Zhao L, Feng L, Chen C. Microcellular thermoplastic polyurethanes and their flexible properties prepared by mold foaming process with supercritical CO2. J CELL PLAST 2019. [DOI: 10.1177/0021955x19864392] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Xiulei Jiang
- Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou, P.R. China
- Zhejiang Xinhengtai Advanced Material Co. Ltd, Jiaxing, P.R. China
| | - Ling Zhao
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, P.R. China
| | - Lianfang Feng
- Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou, P.R. China
| | - Chunping Chen
- Zhejiang Xinhengtai Advanced Material Co. Ltd, Jiaxing, P.R. China
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30
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Structure-tunable thermoplastic polyurethane foams fabricated by supercritical carbon dioxide foaming and their compressive mechanical properties. J Supercrit Fluids 2019. [DOI: 10.1016/j.supflu.2019.04.004] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Ge C, Zhai W, Park CB. Preparation of Thermoplastic Polyurethane (TPU) Perforated Membrane via CO 2 Foaming and Its Particle Separation Performance. Polymers (Basel) 2019; 11:E847. [PMID: 31083341 PMCID: PMC6571844 DOI: 10.3390/polym11050847] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Revised: 05/06/2019] [Accepted: 05/07/2019] [Indexed: 11/16/2022] Open
Abstract
The way in which a perforated structure is formed has attracted much interest in the porous membrane research community. This novel structure gives materials an excellent antifouling property as well as a low operating pressure and other benefits. Unfortunately, the current membrane fabrication methods usually involve multi-step processes and the use of organic solvents or additives. Our study is the first to offer a way to prepare perforated membrane by using a physical foaming technique with CO2 as the blowing agent. We selected thermoplastic polyurethane (TPU) as the base material because it is a biocompatible elastomer with excellent tensility, high abrasion resistance, and good elastic resilience. Various processing parameters, which included the saturation pressure, the foaming temperature, and the membrane thickness, were applied to adjust the TPU membrane's perforated morphology. We proposed a possible formation mechanism of the perforated membrane. The as-prepared TPU membrane had good mechanical properties with a tensile strength of about 5 MPa and an elongation at break above 100%. Such mechanical properties make this novel membrane usable as a self-standing filter device. In addition, its straight-through channel structure can separate particles and meet different separation requirements.
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Affiliation(s)
- Chengbiao Ge
- School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
| | - Wentao Zhai
- School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
| | - Chul B Park
- Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada.
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32
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Kim HN, Lee DW, Ryu H, Song GS, Lee DS. Preparation and Characterization of Isosorbide-Based Self-Healable Polyurethane Elastomers with Thermally Reversible Bonds. Molecules 2019; 24:E1061. [PMID: 30889870 PMCID: PMC6471067 DOI: 10.3390/molecules24061061] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 03/14/2019] [Accepted: 03/14/2019] [Indexed: 11/17/2022] Open
Abstract
Polyurethane (PU) is a versatile polymer used in a wide range of applications. Recently, imparting PU with self-healing properties has attracted much interest to improve the product durability. The self-healing mechanism conceivably occurs through the existence of dynamic reversible bonds over a specific temperature range. The present study investigates the self-healing properties of 1,4:3,6-dianhydrohexitol-based PUs prepared from a prepolymer of poly(tetra-methylene ether glycol) and 4,4'-methylenebis(phenyl isocyanate) with different chain extenders (isosorbide or isomannide). PU with the conventional chain extender 1,4-butanediol was prepared for comparison. The urethane bonds in 1,4:3,6-dianhydrohexitol-based PUs were thermally reversible (as confirmed by the generation of isocyanate peaks observed by Fourier transform infrared spectroscopy) at mildly elevated temperatures and the PUs showed good mechanical properties. Especially the isosorbide-based polyurethane showed potential self-healing ability under mild heat treatment, as observed in reprocessing tests. It is inferred that isosorbide, bio-based bicyclic diol, can be employed as an efficient chain extender of polyurethane prepolymers to improve self-healing properties of polyurethane elastomers via reversible features of the urethane bonds.
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Affiliation(s)
- Han-Na Kim
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Baekjedaero, Deokjin-gu, Jeonju 54896, Korea.
| | - Dae-Woo Lee
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Baekjedaero, Deokjin-gu, Jeonju 54896, Korea.
| | - Hoon Ryu
- Industrial Biotechnology Program, Chemical R&D Center, Samyang Corporation, Daedeok-daero 730, Yuseong-gu, Daejeon 34055, Korea.
| | - Gwang-Seok Song
- Industrial Biotechnology Program, Chemical R&D Center, Samyang Corporation, Daedeok-daero 730, Yuseong-gu, Daejeon 34055, Korea.
| | - Dai-Soo Lee
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, 567 Baekjedaero, Deokjin-gu, Jeonju 54896, Korea.
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33
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Yeh SK, Liu WH, Huang YM. Carbon Dioxide-Blown Expanded Polyamide Bead Foams with Bimodal Cell Structure. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b05195] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Xu J, Cheng L, Zhang Z, Zhang L, Xiong C, Huang W, Xie Y, Yang L. Highly exfoliated montmorillonite clay reinforced thermoplastic polyurethane elastomer:in situpreparation and efficient strengthening. RSC Adv 2019; 9:8184-8196. [PMID: 35518655 PMCID: PMC9061283 DOI: 10.1039/c8ra10121c] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 03/06/2019] [Indexed: 11/23/2022] Open
Abstract
Highly exfoliated montmorillonite (MMT) clay reinforced thermoplastic polyurethane elastomers (TPUs) were prepared by an in situ solution polymerization method. By using small amount of 4,4′-methylenediphenyl diisocyanate (MDI) modified pristine clay (MDI-MMT) as fillers, the mechanical properties of TPUs were greatly improved. For example, with the addition of only 1.0 wt% of MDI-MMT, the resultant TPU/MDI-MMT nanocomposites showed approximately 36% increase in initial Young's modulus, 70% increase in tensile strength and 46% increase in ultimate elongation at break as compared with those of neat TPU. Detailed study showed that, owing to the strong covalent bonding between the MMT sheets and TPU matrix, MMT sheets were highly exfoliated during the polymerization process, and the highly exfoliated MMT sheets gave rise to the greatly improved mechanical properties and thermomechanical properties of TPU/MDI-MMT nanocomposites. The present work demonstrates that the in situ preparation of TPU/MDI-MMT nanocomposites by using MDI-MMT as fillers is a highly efficient method for reinforcing TPU. Highly exfoliated montmorillonite (MMT) clay reinforced thermoplastic polyurethane elastomers (TPUs) were prepared by an in situ solution polymerization method.![]()
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Affiliation(s)
- Jingshui Xu
- Technology Research Center for Lingnan Characteristic Fruits & Vegetables Processing and Application Engineering of Guangdong Province
- Food Science Innovation Team of Guangdong Higher Education Institutes
- Guangdong University of Petrochemical Technology
- Maoming
- China
| | - Lihua Cheng
- Technology Research Center for Lingnan Characteristic Fruits & Vegetables Processing and Application Engineering of Guangdong Province
- Food Science Innovation Team of Guangdong Higher Education Institutes
- Guangdong University of Petrochemical Technology
- Maoming
- China
| | - Zhong Zhang
- Technology Research Center for Lingnan Characteristic Fruits & Vegetables Processing and Application Engineering of Guangdong Province
- Food Science Innovation Team of Guangdong Higher Education Institutes
- Guangdong University of Petrochemical Technology
- Maoming
- China
| | - Ling Zhang
- Technology Research Center for Lingnan Characteristic Fruits & Vegetables Processing and Application Engineering of Guangdong Province
- Food Science Innovation Team of Guangdong Higher Education Institutes
- Guangdong University of Petrochemical Technology
- Maoming
- China
| | - Cen Xiong
- Technology Research Center for Lingnan Characteristic Fruits & Vegetables Processing and Application Engineering of Guangdong Province
- Food Science Innovation Team of Guangdong Higher Education Institutes
- Guangdong University of Petrochemical Technology
- Maoming
- China
| | - Weishan Huang
- Guangyou-Mailon New Materials Research Institute
- Guangdong Mailon New Materials Co. Ltd
- Shantou
- China
| | - Yashui Xie
- Guangyou-Mailon New Materials Research Institute
- Guangdong Mailon New Materials Co. Ltd
- Shantou
- China
| | - Liping Yang
- Guangdong Gulf New Materials Research Institute
- Shenzhen
- China
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35
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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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36
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Xu B, Xu W, Liu Y, Chen R, Li W, Wu Y, Yang Z. Surface modification of α-zirconium phosphate by zeolitic imidazolate frameworks-8 and its effect on improving the fire safety of polyurethane elastomer. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4404] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Baoling Xu
- School of Materials Science and Chemical Engineering; Anhui Jianzhu University; 292 Ziyun Road Hefei Anhui 230601 People's Republic of China
| | - Wenzong Xu
- School of Materials Science and Chemical Engineering; Anhui Jianzhu University; 292 Ziyun Road Hefei Anhui 230601 People's Republic of China
| | - Yucheng Liu
- School of Materials Science and Chemical Engineering; Anhui Jianzhu University; 292 Ziyun Road Hefei Anhui 230601 People's Republic of China
| | - Rui Chen
- School of Materials Science and Chemical Engineering; Anhui Jianzhu University; 292 Ziyun Road Hefei Anhui 230601 People's Republic of China
| | - Wu Li
- School of Materials Science and Chemical Engineering; Anhui Jianzhu University; 292 Ziyun Road Hefei Anhui 230601 People's Republic of China
| | - Yun Wu
- Institute of Science and Information Technology; Anhui University; Hefei Anhui 230601 People's Republic of China
| | - Zuotang Yang
- School of Materials Science and Chemical Engineering; Anhui Jianzhu University; 292 Ziyun Road Hefei Anhui 230601 People's Republic of China
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37
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Zhang S, Xu Y, Wang P, Peng X, Zeng J. Fabrication-controlled morphology of poly(butylene succinate) nano-microcellular foams by supercritical CO2. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4304] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Shuidong Zhang
- College of Mechanical and Automotive; South China University of Technology; Guangzhou Guangdong 510640 China
- State Key Laboratory of Polymer Materials Engineering (Sichuan University); Chengdu 610640 China
- Tianjin Fire Research Institute of the Ministry of Public Security; Tianjin 300381 China
| | - Yue Xu
- College of Mechanical and Automotive; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Peng Wang
- College of Mechanical and Automotive; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Xiangfang Peng
- College of Mechanical and Automotive; South China University of Technology; Guangzhou Guangdong 510640 China
| | - Jianbing Zeng
- School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 China
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38
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Zhao D, Wang G, Wang M. Investigation of the effect of foaming process parameters on expanded thermoplastic polyurethane bead foams properties using response surface methodology. J Appl Polym Sci 2018. [DOI: 10.1002/app.46327] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Dong Zhao
- School of Materials Science and Engineering; Tongji University; Shanghai 201804 China
| | - Guojian Wang
- School of Materials Science and Engineering; Tongji University; Shanghai 201804 China
- Key Laboratory of Advanced Civil Engineering Materials; Ministry of Education; Shanghai 201804 China
| | - Mouhua Wang
- Shanghai Institute of Applied Physics; Chinese Academy of Sciences; Shanghai 201800 China
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39
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Effect of the soft and hard segment composition on the properties of waterborne polyurethane-based solid polymer electrolyte for lithium ion batteries. J Solid State Electrochem 2017. [DOI: 10.1007/s10008-017-3855-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Steam-chest molding of expanded thermoplastic polyurethane bead foams and their mechanical properties. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2017.09.011] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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41
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Xu WZ, Xu BL, Wang GS, Wang XL, Liu L. Synergistic effect of expandable graphite and α-type zirconium phosphate on flame retardancy of polyurethane elastomer. J Appl Polym Sci 2017. [DOI: 10.1002/app.45188] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Wen-Zong Xu
- School of Materials Science and Chemical Engineering; Anhui Jianzhu University; 292 Ziyun Road Hefei Anhui Province 230601 People's Republic of China
| | - Bao-Ling Xu
- School of Materials Science and Chemical Engineering; Anhui Jianzhu University; 292 Ziyun Road Hefei Anhui Province 230601 People's Republic of China
| | - Gui-Song Wang
- School of Materials Science and Chemical Engineering; Anhui Jianzhu University; 292 Ziyun Road Hefei Anhui Province 230601 People's Republic of China
| | - Xiao-Ling Wang
- School of Materials Science and Chemical Engineering; Anhui Jianzhu University; 292 Ziyun Road Hefei Anhui Province 230601 People's Republic of China
| | - Liang Liu
- School of Materials Science and Chemical Engineering; Anhui Jianzhu University; 292 Ziyun Road Hefei Anhui Province 230601 People's Republic of China
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42
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Barzegari MR, Hossieny N, Jahani D, Park CB. Characterization of hard-segment crystalline phase of poly(ether- block -amide) (PEBAX ® ) thermoplastic elastomers in the presence of supercritical CO 2 and its impact on foams. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.02.088] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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