The effect of different orientations in rigid rod polyimide films on the graphitized products

Smirnova, V. E.; Gofman, I. V.; Maritcheva, T.A.; Yudin, V. E.; Eto, Kazuma; Takeichi, Tsutomu; Kaburagi, Yutaka; Hishiyama, Yoshihiro

doi:10.1016/j.carbon.2006.11.012

Cited by 28 publications

(18 citation statements)

References 22 publications

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“…It can be seen in Figure 6 that, above the T g , the pristine PMDA-ODA film exhibited a considerable elongation, however, the deformation rate decreased gradually when the temperature reached 430 °C, implying an initial stage of PI thermal degradation followed by the formation of destruction crosslinks [ 34 , 40 ]. The latter are regarded to decrease the mobility of PMDA-ODA macromolecules.…”

Section: Resultsmentioning

confidence: 99%

Polyimide-Based Nanocomposites with Binary CeO2/Nanocarbon Fillers: Conjointly Enhanced Thermal and Mechanical Properties

et al. 2020

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To design novel polymer materials with optimal properties relevant to industrial usage, it would seem logical to modify polymers with reportedly good functionality, such as polyimides (PIs). We have created a set of PI-based nanocomposites containing binary blends of CeO2 with carbon nanoparticles (nanocones/discs or nanofibres), to improve a number of functional characteristics of the PIs. The prime novelty of this study is in a search for a synergistic effect amidst the nanofiller moieties regarding the thermal and the mechanical properties of PIs. In this paper, we report on the structure, thermal, and mechanical characteristics of the PI-based nanocomposites with binary fillers. We have found that, with a certain composition, the functional performance of a material can be substantially improved. For example, a PI containing SO2-groups in its macrochains not only had its thermal stability enhanced (by ~20 °C, 10% weight loss up to 533 °C) but also had its stiffness increased by more than 10% (Young’s modulus as high as 2.9–3.0 GPa) in comparison with the matrix PI. In the case of a PI with no sulfonic groups, binary fillers increased stiffness of the polymer above its glass transition temperature, thereby widening its working temperature range. The mechanisms of these phenomena are discussed. Thus, this study could contribute to the design of new composite materials with controllable and improved functionality.

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Section: Resultsmentioning

confidence: 99%

Polyimide-Based Nanocomposites with Binary CeO2/Nanocarbon Fillers: Conjointly Enhanced Thermal and Mechanical Properties

et al. 2020

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“…Thermal treatments of PI films have been studied for decades and different mechanism of PI decomposition, which can take place depending on the PI chemical structure and thermal treatment conditions, have been proposed . Carbon‐nitrogen and carbon‐oxygen are the first bonds to be cleaved, leading to a carbon‐rich PI material.…”

Section: Resultsmentioning

confidence: 99%

Thermally induced chemical evolution in polyimide films investigated by X‐ray photoelectron spectroscopy

Battirola

Rudolf

Tremiliosi‐Filho

et al. 2017

Polymer Engineering & Sci

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“…Especially, carbonization and graphitization of PI were extensively studied because of the molecular design flexibility of PI. The effects of chemical structure of PI [4], cold-drawing of PI film [5][6][7], and constraint during imidization of poly(amide acid) [8] on carbonization and graphitization have been extensively reported on the Kapton type PI, PI(PMDA/ODA) [9], and other PI films [10][11][12][13][14]. It was also revealed that carbonization of PI films give microporous carbon films by thermally treating PI films at 700-900 °C [15,16].…”

Section: Introductionmentioning

confidence: 98%

Characterization of Carbon Films Prepared from Polybenzoxazine Films

Takahashi

Osawa

Shibayama

et al. 2015

J. Photopol. Sci. Technol.

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Two types of polybenzoxazine films, PBa and PPd, that were prepared by the thermal cure of benzoxazines, Ba and Pd, were carbonized at temperature-controlled condition, and the effect of the chemical structure of the polybenzoxazines on carbonization was examined by comparing with the carbonization behavior of polyimide film. X-ray diffraction and X-ray photoelectron spectra measurements showed that the carbon films prepared by heat treatment of rigid polybenzoxazine, PPd, at 900 °C and 1000 °C were the most graphitized. Micrographitic structure was confirmed by transmission electron microscope observation for the carbonized films of PBa and PPd at 1000 °C.

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The effect of different orientations in rigid rod polyimide films on the graphitized products

Cited by 28 publications

References 22 publications

Polyimide-Based Nanocomposites with Binary CeO2/Nanocarbon Fillers: Conjointly Enhanced Thermal and Mechanical Properties

Polyimide-Based Nanocomposites with Binary CeO2/Nanocarbon Fillers: Conjointly Enhanced Thermal and Mechanical Properties

Thermally induced chemical evolution in polyimide films investigated by X‐ray photoelectron spectroscopy

Characterization of Carbon Films Prepared from Polybenzoxazine Films

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