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Tharakan SA, Muthusamy S. The effects of long and bulky aromatic pendent groups with flexible linkages on the thermal, mechanical and electrical properties of the polyimides and their nanocomposites with functionalized silica. RSC Adv 2021; 11:16645-16660. [PMID: 35479123 PMCID: PMC9032119 DOI: 10.1039/d0ra08561h] [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: 10/07/2020] [Accepted: 04/12/2021] [Indexed: 11/21/2022] Open
Abstract
A novel diamine bis(4-aminophenyl)bis{3,4[(4-(8-quinolyloxymethyl carbonyl)]}methane, containing two long/bulky aromatic pendent chains was synthesized by incorporating aromatic and hetero aromatic groups with flexible linkages. Flexible, stretchable, thermally stable and processable polyimides were prepared by reacting this newly synthesized diamine with commercial tetracarboxylic acid dianhydrides like 3,3',4,4'-benzophenone tetra carboxylic acid dianhydride (BTDA) and 4,4'-(4,4'-isopropylidenediphenoxy)diphthalic Anhydride (BPADA). Nanocomposites of polyimides were prepared using aromatic amine functionalized silica as a filler by solution casting method. The current work investigates the effects of incorporating long/bulky aromatic side chains and flexible linkages on the thermal, mechanical, electrical and optical properties of the polyimides and nanocomposites. The polyimides showed good thermal stability (T 10% = 364 & 388), high flame resistance, low glass transition temperatures (T g = 130 °C & 156 °C), very low dielectric constants (2.5 & 2.8 at 1 MHz) and good optical transparency. The neat polyimides displayed good elongation at break (133-155%) but possessed low tensile strength. The chemically imidized polyimides showed good solubility in low and high boiling solvents. Nanocomposites of polyimides based on aromatic amine functionalized silica exhibited enhanced properties with T 10% values varying between 409-482 °C, T g between 165-280 °C and higher dielectric constants (3-5.7 at 1 MHz).
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Belov N, Chatterjee R, Nikiforov R, Ryzhikh V, Bisoi S, Kumar A, Banerjee S, Yampolskii Y. New poly(ether imide)s with pendant di-tert-butyl groups: Synthesis, characterization and gas transport properties. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.02.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Yampolskii YP, Belov NA, Alentiev AY. Fluorine in the structure of polymers: influence on the gas separation properties. RUSSIAN CHEMICAL REVIEWS 2019. [DOI: 10.1070/rcr4861] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Results of studies on the separation of gases and vapours using fluorine-containing polymers are integrated and analyzed. Methods for the synthesis of these polymers are considered, including direct gas-phase fluorination, plasma polymerization of fluorine-containing precursors and modification of organic polymers, as well as diverse syntheses of monomers containing C−F and C−CF3 bonds and their subsequent polymerization. Structure – property relationships for these polymers are elucidated and their actual and potential applications as membrane materials are discussed.
The bibliography includes 165 references.
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Chatterjee R, Bisoi S, Kumar AG, Padmanabhan V, Banerjee S. Polyimides Containing Phosphaphenanthrene Skeleton: Gas-Transport Properties and Molecular Dynamics Simulations. ACS OMEGA 2018; 3:13510-13523. [PMID: 31458058 PMCID: PMC6644473 DOI: 10.1021/acsomega.8b01364] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 09/28/2018] [Indexed: 06/01/2023]
Abstract
A series of new semifluorinated polyimide (PI) films with phosphaphenanthrene skeleton were prepared by thermal imidization of poly(amic acid)s derived from a diamine monomer: 1,1-bis[2'-trifluoromethyl-4'-(4″-aminophenyl)phenoxy]-1-(6-oxido-6H-dibenz⟨c,e⟩⟨1,2⟩oxaphosphorin-6-yl)ethane on reaction with four structurally different aromatic dianhydrides. The chemical structures of the polymers were established by Fourier transform infrared and 1H NMR spectroscopy techniques. The polymers showed a good combination of thermal and mechanical properties (T d10 up to 416 °C under synthetic air and tensile strength up to 91 MPa), low dielectric constant (2.10-2.55 at 1 MHz), and T g values as high as 261 °C. Gas permeabilities of these films were investigated for four different gases CO2, O2, N2, and CH4. The PI films showed high gas permeability (P CO2 up to 175 and P O2 up to 64 barrer) with high permselectivity (P CO2 /P CH4 up to 51 and P O2 /P N2 up to 7.1), and the values are better than those of many other similar polymers reported earlier. For the O2/N2 gas pair, the PIs (PI A) surpassed the present upper boundary limit drawn by Robeson. A detailed molecular dynamics (MD) simulation study has been conducted to understand better the gas-transport properties. The effect of phosphaphenanthrene skeleton, its spatial arrangement, and size distribution function of the free volume were studied using molecular dynamics (MD) simulation and the results are correlated with the experimental data.
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Affiliation(s)
- Rimpa Chatterjee
- Materials
Science Centre, Indian Institute of Technology
Kharagpur, Kharagpur 721302, India
| | - Soumendu Bisoi
- Materials
Science Centre, Indian Institute of Technology
Kharagpur, Kharagpur 721302, India
| | - Anaparthi Ganesh Kumar
- Materials
Science Centre, Indian Institute of Technology
Kharagpur, Kharagpur 721302, India
| | - Venkat Padmanabhan
- Department
of Chemical Engineering, Tennessee Technological
University, Cookeville, Tennessee 38505, United States
| | - Susanta Banerjee
- Materials
Science Centre, Indian Institute of Technology
Kharagpur, Kharagpur 721302, India
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Deng B, Zhang S, Liu C, Li W, Zhang X, Wei H, Gong C. Synthesis and properties of soluble aromatic polyimides from novel 4,5-diazafluorene-containing dianhydride. RSC Adv 2018. [DOI: 10.1039/c7ra12101f] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
A dianhydride monomer containing 4,5-diazofluorene was synthesized, and the corresponding organo-soluble polyimides exhibited good comprehensive properties.
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Affiliation(s)
- Bo Deng
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Shujiang Zhang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Chang Liu
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Wei Li
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xiangdong Zhang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Hua Wei
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Chenliang Gong
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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6
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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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7
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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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8
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Yao J, Wang C, Tian C, Zhao X, Zhou H, Wang D, Chen C. Highly optical transparency and thermally stable polyimides containing pyridine and phenyl pendant. Des Monomers Polym 2017; 20:449-457. [PMID: 29491816 PMCID: PMC5784878 DOI: 10.1080/15685551.2017.1351766] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 07/01/2017] [Indexed: 11/28/2022] Open
Abstract
In order to obtain highly optical transparency polyimides, two novel aromatic diamine monomers containing pyridine and kinky structures, 1,1-bis[4-(5-amino-2-pyridinoxy)phenyl]diphenylmethane (BAPDBP) and 1,1-bis[4-(5-amino-2-pyridinoxy)phenyl]-1-phenylethane (BAPDAP), were designed and synthesized. Polyimides based on BAPDBP, BAPDAP, 2,2-bis[4-(5-amino-2-pyridinoxy)phenyl]propane (BAPDP) with various commercial dianhydrides were prepared for comparison and structure-property relationships study. The structures of the polyimides were characterized by Fourier transform infrared (FT-IR) spectrometer, wide-angle X-ray diffractograms (XRD) and elemental analysis. Film properties including solubility, optical transparency, water uptake, thermal and mechanical properties were also evaluated. The introduction of pyridine and kinky structure into the backbones that polyimides presented good optical properties with 91-97% transparent at 500 nm and a low cut-off wavelength at 353-398 nm. Moreover, phenyl pendant groups of the polyimides showed high glass transition temperatures (Tg ) in the range of 257-281 °C. These results suggest that the incorporating pyridine, kinky and bulky substituents to polymer backbone can improve the optical transparency effectively without sacrificing the thermal properties.
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Affiliation(s)
- Jianan Yao
- National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, Key Laboratory of High Performance Plastics, Ministry of Education, College of Chemistry, Jilin University, Changchun, P. R. China
| | - Chunbo Wang
- National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, Key Laboratory of High Performance Plastics, Ministry of Education, College of Chemistry, Jilin University, Changchun, P. R. China
| | - Chengshuo Tian
- National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, Key Laboratory of High Performance Plastics, Ministry of Education, College of Chemistry, Jilin University, Changchun, P. R. China
| | - Xiaogang Zhao
- National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, Key Laboratory of High Performance Plastics, Ministry of Education, College of Chemistry, Jilin University, Changchun, P. R. China
| | - Hongwei Zhou
- National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, Key Laboratory of High Performance Plastics, Ministry of Education, College of Chemistry, Jilin University, Changchun, P. R. China
| | - Daming Wang
- National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, Key Laboratory of High Performance Plastics, Ministry of Education, College of Chemistry, Jilin University, Changchun, P. R. China
| | - Chunhai Chen
- National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, Key Laboratory of High Performance Plastics, Ministry of Education, College of Chemistry, Jilin University, Changchun, P. R. China
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Chatterjee R, Ghosh S, Bisoi S, Banerjee S. Synthesis, characterization, and gas transport properties of new semifluorinated poly(ether imide)s containing cardo moiety. J Appl Polym Sci 2017. [DOI: 10.1002/app.45213] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rimpa Chatterjee
- Materials Science Centre; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Sipra Ghosh
- Materials Science Centre; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Soumendu Bisoi
- Materials Science Centre; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Susanta Banerjee
- Materials Science Centre; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
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Min BK, Lim JW, Roh HJ, Kim JN. An Expedient Synthesis of Arene-fused Phthalimides from Morita-Baylis-Hillman Carbonates. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10919] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Beom Kyu Min
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Jin Woo Lim
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Hwa Jung Roh
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Jae Nyoung Kim
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
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12
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Huang X, Mei M, Liu C, Pei X, Wei C. Synthesis and Characterization of Fluorinated Polyimide Derived from 3,3′-Diisopropyl-4,4′-diaminodiphenyl-3′′,4′′-difluorophenylmethane. CHINESE J CHEM 2015. [DOI: 10.1002/cjoc.201500393] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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A novel method for predictions of the gas permeation parameters of polymers on the basis of their chemical structure. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.03.055] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Liu CJ, Mei M, Pei XL, Huang XH, Wei C. Aromatic polyimides with tertbutyl-substituted and pendent naphthalene units: synthesis and soluble, transparent properties. CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-015-1658-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Song G, Li X, Jiang Q, Mu J, Jiang Z. A novel structural polyimide material with synergistic phosphorus and POSS for atomic oxygen resistance. RSC Adv 2015. [DOI: 10.1039/c4ra14727h] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of phosphorus-containing polyimide–POSS nanocomposites were synthesized, phosphorus and POSS synthetic self-passivating layers were formed to protect the underlying material from AO attack.
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Affiliation(s)
- Guanghe Song
- College of Chemistry
- The Key Lab of High Performance Plastics
- Ministry of Education
- Jilin University
- ChangChun 130012
| | - Xuesong Li
- College of Chemistry
- The Key Lab of High Performance Plastics
- Ministry of Education
- Jilin University
- ChangChun 130012
| | - Qiyang Jiang
- College of Chemistry
- The Key Lab of High Performance Plastics
- Ministry of Education
- Jilin University
- ChangChun 130012
| | - Jianxin Mu
- College of Chemistry
- The Key Lab of High Performance Plastics
- Ministry of Education
- Jilin University
- ChangChun 130012
| | - Zhenhua Jiang
- College of Chemistry
- The Key Lab of High Performance Plastics
- Ministry of Education
- Jilin University
- ChangChun 130012
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16
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Dinari M, Ahmadizadegan H. Novel and processable polyimides with a N-benzonitrile side chain: thermal, mechanical and gas separation properties. RSC Adv 2015. [DOI: 10.1039/c4ra17030j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
A series of organo-soluble and thermally stable polyimides with N-benzonitrile side group were synthesized from a new diamine monomer, 3-(bis(4-aminophenyl)amino)benzonitrile with different aromatic dianhydrides via thermal or chemical imidization.
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Affiliation(s)
- Mohammad Dinari
- Department of Chemistry
- Isfahan University of Technology
- Isfahan
- Iran
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17
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18
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Li H, Zhang S, Gong C, Liang Y, Qi Z, Li Y. Synthesis and properties of novel soluble and high T
g
poly(ether imide)s from diamine containing 4,5-diazafluorene and trifluoromethyl units. POLYM INT 2014. [DOI: 10.1002/pi.4791] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hui Li
- College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 PR China
| | - Shujiang Zhang
- College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 PR China
| | - Chenliang Gong
- College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 PR China
| | - Yu Liang
- College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 PR China
| | - Zhigang Qi
- College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 PR China
| | - Yanfeng Li
- College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 PR China
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Pandiyan S, Parandekar PV, Prakash O, Tsotsis TK, Nair NN, Basu S. Controlling the sub-molecular motions to increase the glass transition temperature of polymers. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2013.12.076] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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20
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Abouzari-Lotf E, Shockravi A, Rafieimanesh A, Saremi M, Javadi A, Nasef MM. Novel polyoxadiazoles with non-coplanar ortho-linked structures as highly CO2 permselective membranes. RSC Adv 2014. [DOI: 10.1039/c4ra01595a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel class of polyoxadiazole membranes containing non-coplanar 1,1′-thiobis(2-naphthoxy) groups was synthesized using versatile route and tested for CO2 separation. Upon oxidation, the sulfone-containing membranes exhibited higher permeability and lower selectivity.
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Affiliation(s)
- E. Abouzari-Lotf
- Institute of Hydrogen Economy
- Energy Research Alliance
- International Campus
- Universiti Teknologi Malaysia
- 54100 Kuala Lumpur, Malaysia
| | - A. Shockravi
- Faculty of Chemistry
- Kharazmi University
- Tehran, Iran
| | | | - M. Saremi
- Faculty of Chemistry
- Kharazmi University
- Tehran, Iran
| | - A. Javadi
- Faculty of Chemistry
- Kharazmi University
- Tehran, Iran
| | - M. M. Nasef
- Institute of Hydrogen Economy
- Energy Research Alliance
- International Campus
- Universiti Teknologi Malaysia
- 54100 Kuala Lumpur, Malaysia
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koley T, Bandyopadhyay P, Mohanty AK, Banerjee S. Synthesis and characterization of new aromatic poly(ether imide)s and their gas transport properties. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.10.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Xia S, Sun Z, Yi L, Wang Y. Synthesis of soluble polyimide derived from novel naphthalene diamines for liquid crystal alignment layers and a preliminary study on the mechanism of imidization. RSC Adv 2013. [DOI: 10.1039/c3ra42098a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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23
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Sun Z, Liu M, Yi L, Wang Y. High glass transition of organo-soluble copolyimides derived from a rigid diamine with tert-butyl-substituted triphenylpyridine moiety. RSC Adv 2013. [DOI: 10.1039/c3ra00147d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Wang C, Zhao X, Li G. Synthesis and Properties of New Fluorinated Polyimides Derived from an Unsymmetrical and Noncoplanar Diamine. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201200431] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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