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Preparation and Characterization of Key Monomers for Colorless and Transparent Polyimide Films with Low Linear Coefficients of Thermal Expansion
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Xinxin ZHI1, Zhong LI2, Dengxiong SHEN2, Yang YANG3, Ganglan JIANG1, Yaoyao TAN1, Yan ZHANG1, Jingang LIU1
Insulating Materials | 2021, 54(11) : 48 - 54
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Insulating Materials | 2021, 54(11): 48-54
• Polyimide Film Special Issue •
Preparation and Characterization of Key Monomers for Colorless and Transparent Polyimide Films with Low Linear Coefficients of Thermal Expansion
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Xinxin ZHI1, Zhong LI2, Dengxiong SHEN2, Yang YANG3, Ganglan JIANG1, Yaoyao TAN1, Yan ZHANG1, Jingang LIU1
Affiliations
  • 1School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
  • 2Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China
  • 3China Composites Center of Commercial Aircraft Corporation of China, Ltd., Shanghai 201324, China
Published: 2021-11-22 doi: 10.16790/j.cnki.1009-9239.im.2021.11.006
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According to the application requirements of low thermal expansion (low-CTE) for colorless and transparent polyimide (CPI) films, the structural design and synthesis of methyl-substituted aromatic diamine monomers containing rigid amide bonds in the main chain, including 2-methyl-4,4′-diaminobenzanilide (MeDABA) and 2,3′-dimethyl-4,4′-diaminobenzanilide (MMDABA), were performed. Firstly, the dinitro compounds were prepared by the amide reactions using the methyl-substituted p-nitrobenzoic acid or methyl-substituted p-nitroaniline as raw material. Then, a series of new diamine compounds were obtained by the reduction of hydrazine hydrate under the catalysis of Pd/C. The chemical structures of the diamine monomers were characterized by differential scanning calorimetric analysis (DSC), Fourier infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR), mass spectrometry (MS), and elemental analysis (EA). The results show that the aromatic diamine monomers with expected structure are prepared successfully.

colorless and transparent polyimide  /  monomer  /  benzanilide  /  low coefficient of thermal expansion
Xinxin ZHI, Zhong LI, Dengxiong SHEN, Yang YANG, Ganglan JIANG, Yaoyao TAN, Yan ZHANG, Jingang LIU. Preparation and Characterization of Key Monomers for Colorless and Transparent Polyimide Films with Low Linear Coefficients of Thermal Expansion[J]. Insulating Materials, 2021 , 54 (11) : 48 -54 . DOI: 10.16790/j.cnki.1009-9239.im.2021.11.006
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2021.11.006
  • Receive Date：2021-04-14
  • Online Date：2026-03-23
  • Published：2021-11-22
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  • Received：2021-04-14
  • Revised：2021-05-27
Funding
Affiliations
    1School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
    2Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China
    3China Composites Center of Commercial Aircraft Corporation of China, Ltd., Shanghai 201324, China
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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