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Mercer FW, McKenzie MT. Dielectric and thermal characterization of fluorinated polyimides containing heterocyclic moieties. HIGH PERFORM POLYM 2016. [DOI: 10.1088/0954-0083/5/2/002] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A series of fluorinated polyinides and fluorinated polyimides containing heterocyclic moieties were prepared and investigated to determine their dielectric constants, dielectric constants as a function of relative humidity (RH) and thermal properties. Thle fluorinated polyimides containing heterocyclic moieties were prepared from diamines containing pyridine, pyridazine, oxadiazole or benzoxazole moieties. The properties of the fluorinated heterocyclic-containing polyimides were compared with those of fluorinated polyimides prepared from aromatic diamines. In most cases, the introduction of heterocyclic moieties caused an increase in dielectric constant, an increase in the dielectric constant as a function of relative humidity and a decrease in thermal stability compared with the polyimides prepared with aromatic diamines.
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Affiliation(s)
| | - Martin T McKenzie
- Raychem Corporation. Corporate Research and Development Mail Stop 123/8512, Menlo Park, CA 94025. USA
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Guan Y, Wang D, Song G, Zhang X, Chen C, Zhou H, Dang G, Zhao X. Synthesis and characterization of novel polyimides derived from 3,6-bis(4-aminophenoxy)pyridazine. HIGH PERFORM POLYM 2014. [DOI: 10.1177/0954008313518566] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Pyridazine-containing aromatic diamine monomer, 3,6-bis(4-aminophenoxy)pyridazine (APPD), was successfully synthesized by a nucleophilic substitution reaction of 3,6-dichloropyridazine with para-aminophenol. The aromatic heterocyclic diamine was employed to synthesize a series of polyimides (PIs) by polycondensation with various commercially available aromatic dianhydrides in N, N-dimethylacetamide via the conventional two-step method and further thermal imidization forming polyimides. The inherent viscosities of the resulting poly (amic acid)s were in the range of 0.47–1.51 dL g−1. Meanwhile, strong and flexible PI films were obtained, which had good thermal resistance, with the glass transition temperatures of 214–305°C and the temperature at 5% weight loss of 421–463°C under nitrogen atmosphere, as well as outstanding mechanical properties with tensile strengths of 61–102 MPa and elongations at break of 2.8–64.7%. The cutoff wavelength of the PI films were ranged in 357–413 nm.
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Affiliation(s)
- Yue Guan
- Alan G. MacDiarmid Institute, Jilin University, Changchun, People’s Republic of China
| | - Daming Wang
- Alan G. MacDiarmid Institute, Jilin University, Changchun, People’s Republic of China
| | - Guangliang Song
- Alan G. MacDiarmid Institute, Jilin University, Changchun, People’s Republic of China
| | - Xingdi Zhang
- Alan G. MacDiarmid Institute, Jilin University, Changchun, People’s Republic of China
| | - Chunhai Chen
- Alan G. MacDiarmid Institute, Jilin University, Changchun, People’s Republic of China
| | - Hongwei Zhou
- Alan G. MacDiarmid Institute, Jilin University, Changchun, People’s Republic of China
| | - Guodong Dang
- Alan G. MacDiarmid Institute, Jilin University, Changchun, People’s Republic of China
| | - Xiaogang Zhao
- Alan G. MacDiarmid Institute, Jilin University, Changchun, People’s Republic of China
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Wang DH, Arlen MJ, Baek JB, Richard A.Vaia, and, Tan LS. Nanocomposites Derived from a Low-Color Aromatic Polyimide (CP2) and Amine-Functionalized Vapor-Grown Carbon Nanofibers: In Situ Polymerization and Characterization. Macromolecules 2007. [DOI: 10.1021/ma070157c] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- David H. Wang
- University of Dayton Research Institute, Dayton, Ohio 45469-0168, Department of Polymer Science, University of Akron, Akron, Ohio 44325, Department of Industrial Chemistry, Chungbuk National University, Chungbuk, 361-763, South Korea, and Polymer Branch, AFRL/MLBP, Materials & Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7750
| | - Michael J. Arlen
- University of Dayton Research Institute, Dayton, Ohio 45469-0168, Department of Polymer Science, University of Akron, Akron, Ohio 44325, Department of Industrial Chemistry, Chungbuk National University, Chungbuk, 361-763, South Korea, and Polymer Branch, AFRL/MLBP, Materials & Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7750
| | - Jong-Beom Baek
- University of Dayton Research Institute, Dayton, Ohio 45469-0168, Department of Polymer Science, University of Akron, Akron, Ohio 44325, Department of Industrial Chemistry, Chungbuk National University, Chungbuk, 361-763, South Korea, and Polymer Branch, AFRL/MLBP, Materials & Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7750
| | - Richard A.Vaia, and
- University of Dayton Research Institute, Dayton, Ohio 45469-0168, Department of Polymer Science, University of Akron, Akron, Ohio 44325, Department of Industrial Chemistry, Chungbuk National University, Chungbuk, 361-763, South Korea, and Polymer Branch, AFRL/MLBP, Materials & Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7750
| | - Loon-Seng Tan
- University of Dayton Research Institute, Dayton, Ohio 45469-0168, Department of Polymer Science, University of Akron, Akron, Ohio 44325, Department of Industrial Chemistry, Chungbuk National University, Chungbuk, 361-763, South Korea, and Polymer Branch, AFRL/MLBP, Materials & Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433-7750
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