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Synthesis and Properties of Fluorinated Polyimides from 1,1-Bis(4-amino-3,5,-dimethylphenyl)-1-(3,4,5-trifluorophenyl)-2,2,2-trifluoroethane and Various Aromatic Dianhydrides
Zhao, Xiao-Juan; Liu, Jin-Gang; li, Hong-Shen; Fan, Lin; Yang, Shi-Yong
2009-03-05
Source PublicationJOURNAL OF APPLIED POLYMER SCIENCE
ISSN0021-8995
Volume111Issue:5Pages:2210-2219
AbstractA novel aromatic diamine, 1,1-bis(4-amino-3,5-dimethylphenyl)-1-(3,4,5-trifluorophenyl)-2,2,2-trifluoro- ethane, containing a pendant polyfluorinated phenyl group, a trifluoromethyl group, and methyl groups ortho-substituted to the amino groups in the structure was synthesized and characterized. The diamine was polymerized with several aromatic dianhydrides, including 3,3,4,4'-biphenyltetracarboxylic dianhydride, 3,3',4,4'-benzophenonetetracarboxylic dianhydride, 4,4'-oxydiphthalic anhydride, and 4,4'-hexafluoroisopropylidene diphthalic anhydride, via a high-temperature one-step procedure to afford four polyimides (PIs) with inherent viscosities of 0.47-0.70 dL/g. The PIs exhibited excellent solubilities in a variety of organic solvents. They were soluble not only in polar aprotic solvents but in many common solvents, such as cyclopentanone, tetrahydrofuran, and even toluene at room temperature. The tough and flexible PI films cast from the PI Solutions exhibited good thermal stabilities and acceptable tensile properties. The glass-transition temperatures were in the range 312-365 degrees C, and the 5% weight loss temperatures were all higher than 480 degrees C in nitrogen. The films had tensile strengths in the range 76-99 MPa, tensile moduli of 2.2-2.8 GPa, and elongations at break of 5-8%. In addition, the PI films exhibited excellent transparency in the visible light region with cutoff wavelength as low as 302 nm and transmittance higher than 88% at the wavelength of 450 nm. The PI films showed low dielectric constants ranging from 2.50-2.68 and low moisture absorptions of less than 0.56%. The good combined properties of the PIs mainly resulted from the synergic effects of the different substituents. (C) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 111: 2210-2219, 2009
KeywordFluoropolymers Polyimides Thermal Properties Transparency
DOI10.1002/app.29235
Indexed BySCI
Language英语
WOS IDWOS:000262322900006
PublisherJOHN WILEY & SONS INC
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/66018
Collection中国科学院化学研究所
Corresponding AuthorLiu, Jin-Gang
AffiliationChinese Acad Sci, Inst Chem, Lab Adv Polymer Mat, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Xiao-Juan,Liu, Jin-Gang,li, Hong-Shen,et al. Synthesis and Properties of Fluorinated Polyimides from 1,1-Bis(4-amino-3,5,-dimethylphenyl)-1-(3,4,5-trifluorophenyl)-2,2,2-trifluoroethane and Various Aromatic Dianhydrides[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2009,111(5):2210-2219.
APA Zhao, Xiao-Juan,Liu, Jin-Gang,li, Hong-Shen,Fan, Lin,&Yang, Shi-Yong.(2009).Synthesis and Properties of Fluorinated Polyimides from 1,1-Bis(4-amino-3,5,-dimethylphenyl)-1-(3,4,5-trifluorophenyl)-2,2,2-trifluoroethane and Various Aromatic Dianhydrides.JOURNAL OF APPLIED POLYMER SCIENCE,111(5),2210-2219.
MLA Zhao, Xiao-Juan,et al."Synthesis and Properties of Fluorinated Polyimides from 1,1-Bis(4-amino-3,5,-dimethylphenyl)-1-(3,4,5-trifluorophenyl)-2,2,2-trifluoroethane and Various Aromatic Dianhydrides".JOURNAL OF APPLIED POLYMER SCIENCE 111.5(2009):2210-2219.
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