A new high-performance thermoplastic polyimide and its fiber-reinforced composites

Livengood, Bryan P.; Chalmers, Tammy M.; Gu, Yanqing; Zhang, Yi-Ding; Harris, Frank W.; Cheng, Stephen Z. D.

doi:10.1016/0040-6031(94)85047-x

Cited by 6 publications

(6 citation statements)

References 7 publications

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“…PI materials are largely used in aerospace, microelectronics, or automotive industries as high‐temperature composites, adhesives, dielectrics, photoresists, nonlinear optical, and membrane materials . In particular, they have found a number of applications in mechanical engineering as structural materials …”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, this method cannot be used for the preparation of uniform thick films on substrates or large pieces with complex geometries . To obtain such pieces without solvent evaporation during the processing stage, an alternative “dry” method applying the powder consolidation technique was reported in the literature, as summarized in Table . The PAA is dried directly after its synthesis to obtain a powder which will be consolidated by sintering.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of the spark plasma sintering processing parameters affecting the properties of polyimide

Schwertz

Ranque

Lemonnier

et al. 2014

J of Applied Polymer Sci

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The present study deals with the optimization of polyimide (PI) mechanical properties, obtained by Spark Plasma Sintering (SPS), by using a method combining Design of Experiments (DOE) with physical, structural, and mechanical characterizations. The effects of SPS parameters such as temperature, pressure, dwell time, and cooling rate on the density, mechanical properties, and structure of PI were investigated. The experimental results revealed that the mechanical properties of the material were optimized by raising the sintering temperature up to 350 C. The optimized SPS processing parameters were a temperature of 350 C, a pressure of 40 MPa, and a dwell time of 5 min. Under these conditions, a relative density of 99.6% was reached within only a few minutes. The corresponding mechanical properties consisted of Young's modulus of 3.43 GPa, a Shore D hardness of 87.3, and a compressive strength of 738 MPa for a maximum compressive strain of 61.8%. Moreover, when working at 320 C and at 100 MPa, an increase in the dwell time was necessary to enhance the properties. Contrary to the other parameters, the cooling rate appeared to be a nonsignificant parameter. Finally, correlations between the PI structure and the mechanical properties were made to demonstrate the densification mechanisms.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of the spark plasma sintering processing parameters affecting the properties of polyimide

Schwertz

Ranque

Lemonnier

et al. 2014

J of Applied Polymer Sci

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“…According to the summary of the results of the studies conducted by Lu et al, [8] Sue et al, [10] and Livengood et al [9] given in Table 6, PAAS-T exhibited much more enhanced results in terms of flexural strength, flexural modulus and onset temperature in the DMA. Moreover, PAA-TS also exhibited enhanced results compared to those reported in most studies in the literature.…”

Section: Resultsmentioning

confidence: 93%

“…The composite containing BTDA/3,4 ODA/PA exhibited a flexural strength of 536 MPa and a flexural modulus of 95 GPa, while the composite containing BTDA-BPDA (9:1)/3,4 ODA/PA exhibited a flexural strength of 500 MPa and a flexural modulus of 90.5 GPa. Livengood et al [9] synthesized a PAA precursor resin from BTDA and 2,2 0 -dimethyl-1,3-(4-aminophenoxy)propane and prepared CF-reinforced thermoplastic PI matrix composites. They used the T650 carbon unidirectional fiber and manufactured the composites with the drum winding method.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of low‐density heat‐resistant polyimide‐based advanced composite sandwich panels

Çakır

Akın

2021

Polymer Composites

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“…5 Therefore, great efforts have been devoted to the development of high-performance melt-processable TPIs which can be used as high-temperature matrix resins for advanced composites. 6–8…”

Section: Introductionmentioning

confidence: 99%

Improved mechanical properties of aligned multi-walled carbon nanotube/thermoplastic polyimide composites by hot stretching

Nam

Goto

Kamei

et al. 2018

Journal of Composite Materials

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High heat resistance composites based on thermoplastic polyimide resin and aligned multi-walled carbon nanotube sheets have been developed using hot-melt processing method with a vacuum-assisted system. The horizontally aligned carbon nanotube sheets were produced from vertically aligned carbon nanotube arrays using drawing and press-winding techniques. Effects of processing conditions, carbon nanotube contents, and hot stretching on the mechanical properties of the composites were examined. The aligned carbon nanotube/thermoplastic polyimide composites were fabricated successfully at a temperature of 410℃ under 2 MPa pressure. The surface morphologies of the composites showed high alignment and dense packing of carbon nanotubes, and a good impregnation of the thermoplastic polyimide matrix into the aligned carbon nanotube sheets. The best mechanical properties of the aligned carbon nanotube/thermoplastic polyimide composites were achieved at the carbon nanotube volume fraction of about 50% in this study. Hot stretching of the aligned carbon nanotube/thermoplastic polyimide composites at the temperatures above the glass transition temperature and below the melting temperature improved the mechanical properties of the composites considerably.

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A new high-performance thermoplastic polyimide and its fiber-reinforced composites

Cited by 6 publications

References 7 publications

Optimization of the spark plasma sintering processing parameters affecting the properties of polyimide

Optimization of the spark plasma sintering processing parameters affecting the properties of polyimide

Mechanical properties of low‐density heat‐resistant polyimide‐based advanced composite sandwich panels

Improved mechanical properties of aligned multi-walled carbon nanotube/thermoplastic polyimide composites by hot stretching

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