期刊
EUROPEAN POLYMER JOURNAL
卷 45, 期 1, 页码 230-236出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2008.10.023
关键词
Fluorinated aromatic polyamide; 2-(4-Trifluoromethylphenoxy)terephthaloyl; chloride; Solubility; Thermal property; Dielectric propertySolubility
资金
- National Natural Science Foundation of China [20664001]
- Research Program of Jiangxi Province Department of Education [2007-123, GJJ08166]
A series of novel fluorinated aromatic polyamides derived from a new monomer, 2-(4-trifluoromethylphenoxy)terephthaloyl chloride (TFTPC), with various aromatic diamines were synthesized and characterized. The polyamides were obtained in high yields and moderately high inherent viscosities ranging from 1.07 to 1.16 dL/g. All the polyamides were amorphous and readily soluble in many organic solvents, such as N-methyl-2-pyrrolidinone (NMP), N,N'-dimethylacetamide (DMAc), N,N'-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO), and could afford flexible and tough films via solution casting. The cast films exhibited good mechanical properties with tensile strengths of 82.8-107.3 MPa, elongation at break of 4.1-7.2%, and tensile modulus of 2.26-3.95 GPa. These polyamide films also exhibited good thermal stability with the glass transition temperature of 222-294 degrees C, the temperature at 5% weight loss of 442-472 degrees C in nitrogen. They exhibited low dielectric constants ranging from 3.25 to 3.39 (1 MHz), low moisture absorption in the range of 1.32-2.45%, high transparency with an ultraviolet-visible absorption cut-off wavelength in the 330-371 nm range, and excellent electrical properties. (c) 2008 Elsevier Ltd. All rights reserved.
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