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Butnaru I, Sava I, Damaceanu MD. Exploring the impact of triphenylmethane incorporation on physical properties of polyimides with emphasis on optical and halochromic behaviour. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122621] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Cao C, Liu L, Ma X, Zhang X, Lv T. Synthesis and properties of fluorinated copolymerized polyimide films. POLIMEROS 2020. [DOI: 10.1590/0104-1428.10019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Chuanhao Cao
- Harbin University of Science and Technology, China
| | - Lizhu Liu
- Harbin University of Science and Technology, China; Ministry of Education, China
| | - Xinyu Ma
- Harbin University of Science and Technology, China
| | - Xiaorui Zhang
- Harbin University of Science and Technology, China; Ministry of Education, China
| | - Tong Lv
- Harbin University of Science and Technology, China
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Castro-Blanco RA, Rojas-Rodríguez M, Hernández A, Lozano ÁE, Alexandrova L, Aguilar-Lugo C. Aromatic polyimides and copolyimides containing bulky t-butyltriphenylmethane units. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-03003-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Rojas-Rodríguez M, Aguilar-Lugo C, Lozano AE, Hernández A, Mancilla-Cetina E, Alexandrova L. Synthesis and properties of highly processable asymmetric polyimides with bulky phenoxy groups. HIGH PERFORM POLYM 2019. [DOI: 10.1177/0954008319877455] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A series of new aromatic polyimides (PIs) and co-PIs containing bulky tert-butyl phenoxy group was synthesized by one-step high-temperature polycondensation of 1,3-diamino-4-(4′- tert-butylphenoxy)benzene ( tBuPDAB) with different commercially available aromatic dianhydrides. The polymers were obtained in quantitative yields with inherent viscosities of 0.40–0.70 dL g−1. They exhibited high thermal stability with 10% weight loss above 480°C and were cast in films with good mechanical properties capable to be tested as gas separation membranes. These PIs were compared with analogs bearing phenoxy group (PDAB). The incorporation of tBu improved the solubility of the PIs, their free volume fraction, d-spacing, and gas permeability coefficients in comparison with their analogs obtained from PDAB. The permeability enhancement was from 2.5 to 8 times depended on the gas tested. The PI, based on tBuPDAB and 4,4’-(hexafluoroisopropylidene)diphtalic anhydride and, thus, containing two different bulky pendant groups, showed the highest gas permeability coefficient for CO2 (58.3 Barrer) and moderate ideal selectivity to the gas pair CO2/CH4 ( α = 18.0).
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Affiliation(s)
- Mario Rojas-Rodríguez
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de Mexico, Mexico
| | - Carla Aguilar-Lugo
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de Mexico, Mexico
| | - Angel E Lozano
- SMAP, UA-UVA_CSIC, Associated Research Unit to CSIC. Universidad de Valladolid, Facultad de Ciencias, Valladolid, Spain
- Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, Madrid, Spain
- IU CINQUIMA, Universidad de Valladolid, Valladolid, Spain
| | - Antonio Hernández
- SMAP, UA-UVA_CSIC, Associated Research Unit to CSIC. Universidad de Valladolid, Facultad de Ciencias, Valladolid, Spain
| | - Enoc Mancilla-Cetina
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de Mexico, Mexico
| | - Larissa Alexandrova
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de Mexico, Mexico
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Lu Y, Hao J, Xiao G, Li L, Hu Z, Wang T. Optical, thermal and gas separation properties of acetate-containing copoly(ether-imide)s based on 6FDA and fluorenyl diamines. HIGH PERFORM POLYM 2019. [DOI: 10.1177/0954008318822118] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The diamine, 9,9-bis[4-(4-amino-3-hydroxylphenoxy)phenyl]fluorene (BAHPPF) was synthesized by the modified two-step method. Then, a series of acetate-containing copoly(ether-imide)s were prepared by the copolymerization of BAHPPF, 9,9-bis(4-aminophenyl)fluorene (BAF) and 2,2′-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) followed by chemical imidization. The structures and properties of the BAHPPF and copoly(ether-imide)s were characterized by nuclear magnetic resonance spectrometer (NMR), Fourier transform infrared spectrometer (FTIR), X-ray diffractometer (XRD), differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA), ultraviolet-visible spectrophotometer (UV-VIS), and tensile testing. Single gas permeation performances of these copoly(ether-imide)s were also studied for five representative gases of interest including H2, O2, N2, CO2, and CH4. The experimental results showed that the copoly(ether-imide)s showed excellent optical properties with high light transmittance above 80.2% at 450 nm. The glass transition temperature of these copolymers were higher than 333°C. Their tensile strength and Young’s module also increased, and the elongation decreased with the decrease of BAHPPF. High gas permeabilities of copoly(ether-imide)s were obtained, and the ideal selectivity of CO2/CH4 was improved due to the introduction of acetate group and flexible ether linkage. These copoly(ether-imide)s could be applied to the field of optics and gas separation.
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Affiliation(s)
- Yunhua Lu
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, Liaoning, People’s Republic of China
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, People’s Republic of China
| | - Jican Hao
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, Liaoning, People’s Republic of China
| | - Guoyong Xiao
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, Liaoning, People’s Republic of China
| | - Lin Li
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, People’s Republic of China
| | - Zhizhi Hu
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, Liaoning, People’s Republic of China
| | - Tonghua Wang
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, People’s Republic of China
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Fabrication and characterization of soluble, high thermal, and hydrophobic polyimides based on 4-(3,5-dimethoxyphenyl)-2,6-bis(4-aminophenyl)pyridine. J Appl Polym Sci 2017. [DOI: 10.1002/app.45827] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Huang X, Chen B, Mei M, Li H, Liu C, Wei C. Synthesis and Characterization of Organosoluble, Thermal Stable and Hydrophobic Polyimides Derived from 4-(4-(1-pyrrolidinyl)phenyl)-2,6-bis(4-(4-aminophenoxy)phenyl)pyridine. Polymers (Basel) 2017; 9:E484. [PMID: 30965786 PMCID: PMC6418872 DOI: 10.3390/polym9100484] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 09/29/2017] [Accepted: 09/30/2017] [Indexed: 01/13/2023] Open
Abstract
A novel aromatic diamine monomer, 4-(4-(1-pyrrolidinyl)phenyl)-2,6-bis(4-(4-aminophenoxy)phenyl)pyridine (PPAPP) containing pyridine rings, pyrrolidine groups, and ether linkages, was successfully synthesized using 4-hydroxyacetophenone and 1-chloro-4-nitrobenzene as starting materials by three-step reactions, and then used to synthesize a series of polyimides by polycondensation with various aromatic dianhydrides via a two-step method. The structure of PPAPP was characterized by NMR, FT-IR, and mass spectrometry analysis methods. These polymers showed good solubility in common organic solvents (e.g., NMP, DMF, DMSO, and DMAc) at room temperature or on heating. Moreover, they presented a high thermal stability with the glass transition temperature (Tgs) exceeding 316 °C, as well as the temperature of 10% weight loss ranged from 552⁻580 °C with more than 67% residue at 800 °C under nitrogen. Furthermore, they also exhibited excellent hydrophobicity with a contact angle in the range of 85.6°⁻97.7°, and the results of Wide-Angle X-ray Diffraction (WAXD) indicated that all of the polymers revealed an amorphous structure.
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Affiliation(s)
- Xiaohua Huang
- Key Laboratory of New Processing Technology for Nonferrous Metal & Materials, Ministry of Education, and School of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China.
| | - Beicai Chen
- Key Laboratory of New Processing Technology for Nonferrous Metal & Materials, Ministry of Education, and School of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China.
| | - Mei Mei
- Key Laboratory of New Processing Technology for Nonferrous Metal & Materials, Ministry of Education, and School of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China.
| | - Hua Li
- Key Laboratory of New Processing Technology for Nonferrous Metal & Materials, Ministry of Education, and School of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China.
| | - Chanjuan Liu
- Key Laboratory of New Processing Technology for Nonferrous Metal & Materials, Ministry of Education, and School of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China.
| | - Chun Wei
- Key Laboratory of New Processing Technology for Nonferrous Metal & Materials, Ministry of Education, and School of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China.
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