1
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The influence of alkyl groups at ortho-position of amino group on the structure and properties of polyimides. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04537-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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2
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Chen WY, Huang ZH, Liu XL, Liu YJ, Zhao JW, Sheng SR. New fluorinated polyimides based on 1,2-bis(4-aminophenyl)-4,5-bis(4-trifluoromethylphenyl)-1H-imidazole. HIGH PERFORM POLYM 2022. [DOI: 10.1177/09540083221074611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A new aromatic unsymmetrical diamine containing imidazolyl and trifluoromethyl groups, 1,2-bis(4-aminophenyl)-4,5-bis(4-trifluoromethylphenyl)-1H-imidazole was synthesized. A series of novel fluorinated polyimides (PIs) were prepared by polycondensation of this diamine monomer with various aromatic dianhydrides via one-step process. The resulting PIs bearing inherent viscosities of 0.45–0.61 dL/g were amorphous and readily soluble in organic polar solvents such as NMP, DMF, DMAc, THF, and CHCl3. These new PIs exhibited good thermal stability with 10% weight loss temperatures of 530–560°C and char yields of 61–65% at 800°C in nitrogen, as well as good flame retardancy with limited oxygen index value of 40.6–42.8, and outstanding hydrophobicity with the contact angle of 85.2–93.5°. Meanwhile, all the obtained PIs exhibited low water uptake of 0.30–0.53%, strong UV-vis absorption in the range of 267–310 nm in DMF solution, and their films presented high optical transparency with a cut-off wavelength in the 355–392 nm range. Except for the PI film derived from pyromellitic dianhydride, the other PI films had the tensile strength in the range of 53.2–74.1 MPa, elongation at breakage of 6–15%, and tensile modulus of 1.0–1.5 GPa, respectively.
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Affiliation(s)
- Wen-Yue Chen
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, China
| | - Zhi-Hui Huang
- Guangzhou Tinci Materials Technology Co., Ltd, Guangdong, China
| | - Xiao-Ling Liu
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, China
| | - Yong-Jun Liu
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, China
| | - Jing-Wei Zhao
- Guangzhou Tinci Materials Technology Co., Ltd, Guangdong, China
| | - Shou-Ri Sheng
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, China
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Liu C, Mei M, Zang L, Zhou H, Huang X, Wei C. Highly Thermally Stable, Organosoluble, and Hydrophobic Polyimides with Pyrrolidinylphenyl Pendant Groups and Pyridine Units. Macromol Res 2019. [DOI: 10.1007/s13233-019-7035-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Thermal, soluble, and hydrophobic properties of polyimides derived from 4-(4-diethylamino)phenyl-2,6-bis(4-(4-aminophenoxy)phenyl)pyridine. JOURNAL OF POLYMER RESEARCH 2019. [DOI: 10.1007/s10965-019-1759-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Liu H, Zhai L, Bai L, He M, Wang C, Mo S, Fan L. Synthesis and characterization of optically transparent semi-aromatic polyimide films with low fluorine content. POLYMER 2019. [DOI: 10.1016/j.polymer.2018.12.045] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Li L, Xu Y, Che J, Xiaohong L, Zhao W, Ye Z. Preparation and Thermal Degradation of White Fluorinated Polyimide/TiO 2 Composite Films with Strong Shielding Performance. POLYM-PLAST TECH MAT 2019. [DOI: 10.1080/03602559.2018.1466173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Linshuang Li
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Yong Xu
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Jianfei Che
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Liu Xiaohong
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Wei Zhao
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Zhifeng Ye
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, China
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Tapaswi PK, Ha CS. Recent Trends on Transparent Colorless Polyimides with Balanced Thermal and Optical Properties: Design and Synthesis. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201800313] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Pradip Kumar Tapaswi
- Narasinha Dutt College; University of Calcutta; Kolkata 711101 West Bengal India
| | - Chang-Sik Ha
- Department of Polymer Science and Engineering; Pusan National University; Busan 46241 Republic of Korea
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Zhang XL, Song C, Wei MH, Huang ZZ, Sheng SR. Organosoluble and transparent cardo polyimides with high Tg derived from 9,9-bis(4-aminophenyl)xanthene. HIGH PERFORM POLYM 2018. [DOI: 10.1177/0954008318814157] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
9,9-Bis(4-aminophenyl)xanthene (BAPX) was prepared simply and effectively via one-pot, two-step procedure using xanthenone and aniline as main substrates. The monomer BAPX was reacted with six aromatic dianhydrides in N, N-dimethylacetamide (DMAc) to yield the corresponding polyimides (PIs) via the poly(amic acid) precursors and subsequent thermal or chemical imidization. The resulting PIs exhibited good thermal stability with glass transition temperatures of 308–348°C, initial decomposition temperatures of 470–510°C, 10% weight loss temperatures of 540–565°C, and char yields of 55–59% at 800°C in nitrogen, respectively. All polymers were amorphous and readily soluble in organic solvents such as N-methyl-2-pyrrolidone and DMAc. The PI films had tensile strengths of 71–92 MPa, tensile moduli of 1.91–2.35 GPa, and elongations at break of 5–13%. Meanwhile, these polymer films also had high optical transparency with a cutoff wavelength in the range of 367–415 nm, lower dielectric constants (3.02–3.34 at 10 MHz), and low water uptake of 0.30–0.52%.
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Affiliation(s)
- Xiao-Lan Zhang
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, Jiangxi, China
| | - Cheng Song
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, Jiangxi, China
| | - Mei-Hong Wei
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, Jiangxi, China
| | - Zhen-Zhong Huang
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, Jiangxi, China
| | - Shou-Ri Sheng
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, Jiangxi, China
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Huang X, Li H, Liu C, Wei C. Design and synthesis of high heat-resistant, soluble, and hydrophobic fluorinated polyimides containing pyridine and trifluoromethylthiophenyl units. HIGH PERFORM POLYM 2017. [DOI: 10.1177/0954008317749018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In this study, a novel diamine monomer, 4-(4-trifluoromethylthiophenyl)-2,6-bis(4-aminophenyl)pyridine (FTPAP) was synthesized through two-step reaction from 4-trifluoromethylthiobenzaldehyde and 4-nitroacetophenone as raw materials, and then the structure of FTPAP was characterized by Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance, and mass spectrometry. A series of fluorinated polyimides were prepared from FTPAP with five commercial dianhydrides, namely, pyromellitic dianhydride, biphenyl tetracarboxylic dianhydride, oxydiphtahalic anhydride, benzophenone tetracarboxylic dianhydride, and 4,4′-(hexafluoroisopropylidene) diphthalic anhydride. The structure and performance of the fluorinated polymers were fully characterized by FTIR, differential scanning calorimetry, thermogravimetric analysis, and wide-angle X-ray diffraction (WAXD). The inherent viscosity of polymers ranged from 0.41 to 1.45 dL g−1. These polymers displayed good solubility in polar aprotic solvents, such as N, N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide, and N-methyl-2-pyrrolidone, at room temperature or on heating. Furthermore, they exhibited outstanding thermal stability with glass transition temperatures beyond 305°C, and the temperature of 10% weight loss was in the range of 514–573°C with more than 56% residue at 800°C under nitrogen. Moreover, they showed high optical transparency with the cutoff wavelengths in the range of 385–457 nm and excellent hydrophobic property with contact angle in the range of 82.8–97.6°. In addition, the results of WAXD indicated that all of the polymers presented amorphous structure.
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Affiliation(s)
- Xiaohua Huang
- Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education, and School of Material Science and Engineering, Guilin University of Technology, Guilin, People’s Republic of China
| | - Hua Li
- Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education, and School of Material Science and Engineering, Guilin University of Technology, Guilin, People’s Republic of China
| | - Chanjuan Liu
- Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education, and School of Material Science and Engineering, Guilin University of Technology, Guilin, People’s Republic of China
| | - Chun Wei
- Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education, and School of Material Science and Engineering, Guilin University of Technology, Guilin, 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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Lee J, Lee S, Kim K, Yoo T, Kim G, Han H. Low dielectric transparent poly(amide-imide) thin film with nano scale porous structure. Macromol Res 2017. [DOI: 10.1007/s13233-017-5152-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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