Functionalization of MWNTs and its Influence on Thermal Performance of Modified Diphenyl Ether Polyimide Films

Xue Fang; Gui Ming Su; Hai Jian Jiang; Yu Liang Ma; Mei Hui Song; Xiao Chen Zhang; Ming Yue Chen

doi:10.4028/www.scientific.net/MSF.993.654

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HomeMaterials Science ForumMaterials Science Forum Vol. 993Functionalization of MWNTs and its Influence on...

Functionalization of MWNTs and its Influence on Thermal Performance of Modified Diphenyl Ether Polyimide Films

Abstract:

In this paper, we treated MWNTs by Fendon oxidation method and mixed acid method, finding the factors of functionalized effect affecting MWNTs. And added MWNTs treated to PI matrix for the study of the impact of MWNTs treated on thermal properties of the films. We using 3,3^/,4,4^/-diphenyl ether tetraacid dianhydride (ODPA) and 4,4'-diamino diphenyl ether (ODA) as raw material, mixing functional MWNTs and monomer by situ polymerization, then MWNTs / PAA hybrid glue was prepared. The molecular weight and distribution of the polyamic acid were measured by gel permeation chromatography (GPC), and the effects of different addition amounts on the product were examined. The PI/MWNTs films were prepared using an automatic film applicator, and finally the PI films were obtained by thermal imidization. The thermal behavior of the imidization process of the product was determined by differential scanning calorimetry (DSC) and thermogravimetric analysis (TG). The results showed that the PAA film has thermodynamic behavior at 150 ° C and 280 ° C approximately, which could be regarded as the kinetic interruption temperature of the imidization reaction. The dehydration cyclization reaction mainly occured in these two temperature ranges, moreover, the addition of MWNTs had no significant effect on the thermal decomposition temperature of the material which doping amount that does not affect the mechanical strength.

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Periodical:

Materials Science Forum (Volume 993)

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654-661

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.993.654

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Online since:

May 2020

Authors:

Xue Fang*, Gui Ming Su, Hai Jian Jiang, Yu Liang Ma, Mei Hui Song, Xiao Chen Zhang, Ming Yue Chen

Keywords:

Films, Functionalization, MWNTs, Polyimide, Thermal Performance

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