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Takizawa K, Fukuchi S, Takemasa C, Ishige R, Asai S, Ando S. Enhancing photoconductivity of aromatic polyimide films by incorporating fluorinated dianhydrides and main chain triphenylamine structure. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.10.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sheng W, Chen Q, Yang P, Chen C. Synthesis, characterization, and enhanced properties of novel graphite-like carbon nitride/polyimide composite films. HIGH PERFORM POLYM 2015. [DOI: 10.1177/0954008314566894] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this article, polyimide (PI) composite films reinforced by graphitic carbon nitride (g-C3N4) have been synthesized using the in situ polymerization process via thermal imidization. Poly (amic acid) (PAA) solutions were prepared from pyromellitic dianhydride (PMDA) and 4,4′-(4,4′-isopropylidenediphenyl-1,1′-diyldioxy) dianiline (BAPP) in N,N-dimethylacetamide (DMAc) solvent. The different amounts of g-C3N4 obtained from the direct pyrolysis of dicyandiamide (DCDA) at 600°C were incorporated into PAA matrix, which formed g-C3N4/PI composite films by thermal imidization. The morphological structures of the synthesized g-C3N4 and g-C3N4/PI composite films were characterized using fourier transform infrared spectroscopy, x-ray diffraction, scanning electron microscopy and transmission electron microscopy. With 2 wt% g-C3N4 incorporated, the tensile strength and elongation at break of g-C3N4/PI composites were increased by about 23% and 21%, respectively, due to the strong interaction between the g-C3N4 particles and PI. Thermogravimetric analysis indicated that the incorporation of g-C3N4 improved the thermal stability of the PI at low g-C3N4 content. Besides, the dielectric and optical properties of these composites were also studied in this article.
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Affiliation(s)
- Weichen Sheng
- School of Material Science and Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Qiao Chen
- School of Material Science and Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Peijuan Yang
- Zhejiang Economics and Trade Polytechnic, Hangzhou, People’s Republic of China
| | - Caifeng Chen
- School of Material Science and Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
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Li YQ, Fang RC, Zheng AM, Chu YY, Tao X, Xu HH, Ding SJ, Shen YZ. Nonvolatile memory devices based on polyimides bearing noncoplanar twisted biphenyl units containing carbazole and triphenylamine side-chain groups. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm12453f] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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