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Synthesis of PEG200 Lauric Acid Diester and the Performance Test of Viscosity
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Synthesis and Imidization of Polyamic Acid
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Electrochemical Property of Terbium Doped Tantalum Oxide Film Electrode
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Effect of Different Precursor and Carbon Fibre Content on Unidirectional C/C Composites Interlaminar Bonding Strength
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A Dissertation on Polysiloxane-Antifoaming-Agents: Antifoaming Principles, Synthesis and Compound
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Studies on Ceramics Technique
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Synthesis and Imidization of Polyamic Acid

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Abstract:

Polyamic acids (PAA) were synthesized by solution polycondensation of aromatic diamine with dianhydride and PAA were readily soluble in polar organic solvents (N-methylpyrrolidinone, N, N-dimethylacetamide and DMF). It was found that the most appropriated reaction conditions of synthesis of PAA solution were the ratio of dianhydride with diamine being 1.02:1and 3h reaction time at ambient temperature in both N-methylpyrrolidinone and N, N-dimethylacetamide polar organic solvents. PAA thin films were prepared by PAA solution spread on the glass plate and PI thin films were obtained by the casted thin films which underwent a special high-temperature (300°C, 2h) heat curing. The structures of PAA and PI films were characterized by FT-IR spectra and degree of imidization of PAA solution was indicated from IR spectra. The thermal stability was studied by thermogravimetric analysis (TGA) and the thermal behaviors were investigated by differential scanning calorimetry (DSC) in this paper. It was shown that PAA solution were imidization at 200°C mostly and PI had higher thermal stability.

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Periodical:

Advanced Materials Research (Volumes 301-303)

Pages:

9-15

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.301-303.9

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Online since:

July 2011

Authors:

Jian Li Cheng, Cun Zhou, Guo Zheng, Yu Sun

Keywords:

Imidization, Polyamic Acid, Polyimide, Synthesis, Thermalstablity

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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