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Ding X, Kong H, Qiao M, Hu Z, Yu M. Effect of Different Pressures on Microstructure and Mechanical Performance of F-III Fibers in Supercritical Carbon Dioxide Fluid. MATERIALS 2019; 12:ma12050690. [PMID: 30813598 PMCID: PMC6427381 DOI: 10.3390/ma12050690] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/21/2019] [Accepted: 02/21/2019] [Indexed: 12/05/2022]
Abstract
F-III fibers were treated at different pressures in supercritical carbon dioxide fluid and all samples including untreated and treated F-III fibers were characterized by a mechanical performance tester, wide-angle X-ray scattering and small-angle X-ray scattering. By studying the relationship between mechanical performance and microstructural changes of the samples, it was found that microstructural change was the main cause of variation in mechanical performance. Results revealed that the maximum tensile strength and modulus of F-III fibers were acquired at 14 MPa within the pressure range of 8 MPa to 16 MPa when the temperature, tension and time were 250 °C, 6 g·d−1 and 40 min, respectively. Correspondingly, the microstructures of the samples, including the phase fraction, crystal size, orientation factor, fibril radius, fibril length and misorientation angle, have been investigated. It was fortunate that the supercritical carbon dioxide fluid could be used as a medium during the hot-stretch process to improve the mechanical performance of F-III fibers, although the treatment temperature was lower than the glass transition temperature of the F-III fibers.
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Affiliation(s)
- Xiaoma Ding
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Haijuan Kong
- School of Materials Engineer, Shanghai University of Engineer Science, Shanghai 201620, China.
| | - Mengmeng Qiao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Zhifeng Hu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Muhuo Yu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
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Taguchi T, Hatakeyama T, Miike R, Saito H. Evolution of Filament-Shaped Porous Structure in Polycarbonate by Stretching under Carbon Dioxide. Polymers (Basel) 2018; 10:polym10020148. [PMID: 30966184 PMCID: PMC6414922 DOI: 10.3390/polym10020148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 01/25/2018] [Accepted: 01/30/2018] [Indexed: 12/03/2022] Open
Abstract
We found that a filament-shaped porous structure with periodic distance was obtained in polycarbonate for optical disk grade (OD-PC) film by stretching under compressed carbon dioxide (CO2). The evolution of the characteristic porous structure was investigated by in situ observation during the stretching under compressed CO2 and the optical microscopic observation of the stretched specimen. The voids were obtained under high CO2 pressure as in the case of elevated temperature, suggesting that the evolution of the voids was caused by crazing due to chain disentanglement by accelerated molecular motion owing to the plasticization effect of CO2. The filament-shaped voids were initiated at around the yielding point and increased continuously by nucleation in the matrix around the surface of the pre-existing voids. The shape of the voids did not change to an ellipsoidal one during stretching due to suppression of the craze opening by the hydrostatic pressure effect. The stretching of the CO2-absorbed depressurized OD-PC revealed that the initiation of the voids was not only caused by the plasticization effect, but the hydrostatic pressure effect was also required.
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Affiliation(s)
- Tomoaki Taguchi
- Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, Koganei-shi, Tokyo 184-8588, Japan.
| | - Tomoe Hatakeyama
- Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, Koganei-shi, Tokyo 184-8588, Japan.
| | - Ramu Miike
- Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, Koganei-shi, Tokyo 184-8588, Japan.
| | - Hiromu Saito
- Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, Koganei-shi, Tokyo 184-8588, Japan.
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Taguchi T, Miike R, Hatakeyama T, Saito H. Ductile-to-brittle transition behavior of low molecular weight polycarbonate under carbon dioxide. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Tomoaki Taguchi
- Department of Organic and Polymer Materials Chemistry; Tokyo University of Agriculture and Technology; Koganei-shi Tokyo 184-8588 Japan
| | - Ramu Miike
- Department of Organic and Polymer Materials Chemistry; Tokyo University of Agriculture and Technology; Koganei-shi Tokyo 184-8588 Japan
| | - Tomoe Hatakeyama
- Department of Organic and Polymer Materials Chemistry; Tokyo University of Agriculture and Technology; Koganei-shi Tokyo 184-8588 Japan
| | - Hiromu Saito
- Department of Organic and Polymer Materials Chemistry; Tokyo University of Agriculture and Technology; Koganei-shi Tokyo 184-8588 Japan
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Preparation of High Modulus Poly(Ethylene Terephthalate): Influence of Molecular Weight, Extrusion, and Drawing Parameters. INT J POLYM SCI 2017. [DOI: 10.1155/2017/2781425] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Poly(ethylene terephthalate) (PET) which is one of the most commercially important polymers, has for many years been an interesting candidate for the production of high performance fibres and tapes. In current study, we focus on investigating the effects of the various processing variables on the mechanical properties of PET produced by a distinctive process of melt spinning and uniaxial two-stage solid-state drawing (SSD). These processing variables include screw rotation speed during extrusion, fibre take-up speed, molecular weight, draw-ratio, and drawing temperature. As-spun PET production using a single-screw extrusion process was first optimized to induce an optimal polymer microstructure for subsequent drawing processes. It was found that less crystallization which occurred during this process would lead to better drawability, higher draw-ratio, and mechanical properties in the subsequent SSD process. Then the effect of drawing temperature (DT) in uniaxial two-stage SSD process was studied to understand how DT (<Tg or close to Tg or close to Trec) would affect the crystallization, draw-ratio, and final mechanical properties of PET. The designed process in current work is simulated to an industrial production process for PET fibres; therefore, results and analysis in this paper have significant importance for industrial production.
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Taguchi T, Saito H. Effects of plasticization and hydrostatic pressure on tensile properties of PMMA under compressed carbon dioxide and nitrogen. J Appl Polym Sci 2016. [DOI: 10.1002/app.43431] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Tomoaki Taguchi
- Department of Organic and Polymer Materials Chemistry; Tokyo University of Agriculture and Technology; Koganei-Shi, Tokyo 184-8588 Japan
| | - Hiromu Saito
- Department of Organic and Polymer Materials Chemistry; Tokyo University of Agriculture and Technology; Koganei-Shi, Tokyo 184-8588 Japan
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Baseri S, Karimi M, Morshed M. Effect of CO2on Mesomorphic Structure of Cold-Drawn Poly(ethylene therephthalate) Fibers by Dynamic Mechanical Analysis. ADVANCES IN POLYMER TECHNOLOGY 2015. [DOI: 10.1002/adv.21578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | - Mohammad Karimi
- Department of Textile Engineering; Amirkabir University of Technology; Tehran 15914 Iran
| | - Mohammad Morshed
- Department of Textile Engineering; Isfahan University of Technology; Isfahan 84156-83111 Iran
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Baseri S. Effect of drawing temperature on the structure and free volume of semicrystalline polyester yarns. POLYM ENG SCI 2015. [DOI: 10.1002/pen.24045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Avci H, Najafi M, Kilic A, Kotek R. Highly crystalline and oriented high-strength poly(ethylene terephthalate) fibers by using low molecular weight polymer. J Appl Polym Sci 2015. [DOI: 10.1002/app.42747] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Huseyin Avci
- College of Textiles, Textile Engineering Chemistry and Science, North Carolina State University; Raleigh North Carolina
- Metallurgical and Materials Engineering, Eskisehir Osmangazi University; Eskisehir Turkey
| | - Mesbah Najafi
- College of Textiles, Textile Engineering Chemistry and Science, North Carolina State University; Raleigh North Carolina
| | - Ali Kilic
- Department of Textile Engineering; Istanbul Technical University; Istanbul Turkey
| | - Richard Kotek
- College of Textiles, Textile Engineering Chemistry and Science, North Carolina State University; Raleigh North Carolina
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Yeh SK, Liu YC, Wu WZ, Chang KC, Guo WJ, Wang SF. Thermoplastic polyurethane/clay nanocomposite foam made by batch foaming. J CELL PLAST 2013. [DOI: 10.1177/0021955x13477432] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In this study, the foaming of nonwoven fabrics and bulk polymers was investigated. Four different polymers that are commonly used for textiles including polyethylene terephthalate, thermoplastic polyurethane, thermoplastic polyether ester elastomer and polypropylene were foamed by batch foaming. Among the polymers, thermoplastic polyurethane seems to be the most promising material since it possesses the highest cell density and smallest cell size. In addition, nanoclay was added to thermoplastic polyurethane to promote cell nucleation and to increase the cell density. The results showed that well dispersed nanoclay in thermoplastic polyurethane served as an excellent nucleation agent and the cell structure was improved. The cell size of thermoplastic polyurethane nanocomposite foam decreased to 1 µm while the cell density increased to 3 × 1011 cells/cm3.
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Affiliation(s)
- Shu-Kai Yeh
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, Taiwan
| | - Yu-Che Liu
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, Taiwan
| | - Wei-Zhe Wu
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, Taiwan
| | | | - Wen-Jeng Guo
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, Taiwan
| | - Sea-Fue Wang
- Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei, Taiwan
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Osaka N, Kono F, Saito H. SAXS study on deformation behavior of isotactic polypropylene under pressurized CO2. J Appl Polym Sci 2012. [DOI: 10.1002/app.37669] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Baseri S, Karimi M, Morshed M. Study of structural changes and mesomorphic transitions of oriented poly(ethylene therephthalate) fibers in supercritical CO2. Eur Polym J 2012. [DOI: 10.1016/j.eurpolymj.2012.01.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Effect of drawing temperature on mesomorphic transitions of oriented poly(ethylene terephthalate) fibers exposed to supercritical CO2. JOURNAL OF POLYMER RESEARCH 2011. [DOI: 10.1007/s10965-011-9612-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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An investigation of the morphological changes in poly(ethylene terephthalate) fiber treated with supercritical carbon dioxide under various conditions. J Supercrit Fluids 2006. [DOI: 10.1016/j.supflu.2005.12.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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