Thermoplastic Polyimide (TPI)

Feng, Xiantao; Liu, Jialei

doi:10.1002/9781119363910.ch6

Cited by 11 publications

(4 citation statements)

References 45 publications

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“…They determined that an increase in the annular gas flow rate was conducive to the extension of the jet core section and to the improvement in dephosphorization and oxygen utilization. Feng et al [22] obtained the same result. Li et al [23] studied the process of nozzle jets impinging on a molten pool, determining that the momentum of the jet was used to drive the movement of the molten slag and that the kinetic energy of the jet had a great influence on the reaction of the molten pool.…”

Section: Introductionsupporting

confidence: 53%

Effects of Nozzle Layout and Parameters on the Jet Characteristics of a CO2 + O2 Mixed Oxygen Lance

Feng

Zhu

Dong

et al. 2021

Metall Mater Trans B

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Section: Introductionsupporting

confidence: 53%

Effects of Nozzle Layout and Parameters on the Jet Characteristics of a CO2 + O2 Mixed Oxygen Lance

Feng

Zhu

Dong

et al. 2021

Metall Mater Trans B

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“…Meanwhile, the mechanical properties of several commercially available TPI samples were also listed for comparison, whose typical chemical structures are shown in Figure 11. The mechanical properties data for the referenced TPIs were all obtained from the specification supplied by the manufacturers [30][31][32]. were all at the medium level in the series.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Preparation and properties of semi-alicyclic thermoplastic polyimide sheets from stereoisomeric hydrogenated pyromellitic dianhydrides and fluorinated diamine

Qi,

He,

Han

et al. 2024

J Polym Res

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Two semi-alicyclic thermoplastic polyimides (PI) have been prepared from stereoisomeric hydrogenated pyromellitic dianhydrides, including 1S,2R,4S,5R-hydrogenated pyromellitic dianhydride (ccHPMDA or H-PMDA) and 1R,2S,4S,5R-hydrogenated pyromellitic dianhydride (ctHPMDA or Hʹʹ-PMDA) and a fluorine-containing diamine, 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane (BDAF), respectively.The derived PI-1 (ccHPMDA-BDAF) and PI-2 (ctHPMDA-BDAF) resins were easily soluble in polar aprotic solvents, such as N-methyl-2-pyrrolidinone (NMP) and N,N-dimethylacetamide (DMAc) and meanwhile they also exhibited good thermoplasticities. Thus, the PI films (thickness: ~25 μm) and sheets (thickness: ~3 mm) were separately prepared from the PI solutions in DMAc and the PI powders, respectively. The stereoisomeric effects in the ccHPMDA-derived PI-1 and the ct-HPMDA-derived PI-2 apparently affected the melt-flowability of the polymers. PI-2 exhibited lower melting viscosities than that of the PI-1 counterpart. The PI sheets exhibited obviously reduced optical transparency compared with those of the PI films; however better optical transparency than those of the common thermoplastic PI sheets. For example, PI-2 sheet showed the optical transmittance value at the wavelength of 760 nm (T760) of 69.6%, which was 19.5% lower than that of the analogous PI-2 film (T760=89.1%), however 50.3% and 65.7% higher than those of the commercially available PI-ref1 sheet (T760=19.3%) derived from 3,3ʹ,4,4ʹ-oxydiphthalic dianhydride (ODPA) and 4,4ʹ-oxydianiline (ODA) and the PI-ref2 sheet (T760=3.9%, Aurum ® PL450C, Mitsui Chem. Co, Ltd., Japan), respectively.Meanwhile, the PI-1 and PI-2 sheets showed the heat deflection temperatures (HDT) of 261.0 o C and 265.0 o C, respectively, which were obviously higher than those of the referenced PIs. At last, the PI sheets exhibited good mechanical properties, including high flexural strength (130.0~132.0 MPa), flexural modulus (2.87~2.96 GPa), compression strength (124.4~149.3 MPa), compression modulus (1.49~1.59 GPa), and impact strength (129.0~139.6 KJ/m 2 ).

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“…It attracts considerable attention of various researchers 15–17 . The most famous semicrystalline PIs are the following: LaRC‐CPI, 18 LaRC‐CPI2 19 developed by NASA, New‐TPI, designed by Mitsui Toatsu Chemicals 20 and some other semicrystalline PIs developed by Virginia Tech 21 . Although these PIs exhibit crystallinity, most of them can only crystallize in the presence of a solvent and are not capable of recrystallization after passing through the molten state.…”

Section: Introductionmentioning

confidence: 99%

Comparison of properties of carbon reinforced plastic obtained on the basis of semicrystalline polyimideR‐BAPBand other high‐temperature‐resistant thermoplastic matrices

Vaganov

Ivan’kova

Диденко

et al. 2023

J of Applied Polymer Sci

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Heat resistant thermoplastic matrices offer potential advantages over thermoset polymers and represent a promising alternative in advanced composite applications. In the present work, the properties of carbon fiber reinforced plastics (CFRPs) based on the developed semicrystalline polyimide R-BAPB were studied and compared with those of highly heat-resistant thermoplastic polymers such as amorphous polyetherimide Ultem-1000 and semicrystalline polyetherketone PEEK. To obtain CFRP, an approach was used basing on the uniform distribution of polymer powders on continuous carbon fibers by electrostatic spraying followed by their impregnation in heated calenders and hot pressing. The thermal and thermomechanical properties of CFRPs based on mentioned above polymers were studied. The effect of temperature on the mechanical behavior of CFRPs, including flexural properties and interlaminar fracture toughness G 1C , was investigated as well. CFRPs based on PEEK and R-BAPB are found to have the highest thermal stability and heat resistance.The maximum flexural strength, which practically does not change in a wide temperature range from À50 to 180 C, is observed for CFRP based on R-BAPB polyimide. Among the investigated CFRPs, the highest value of interlaminar fracture toughness is shown by CFRPs based on semicrystalline R-BAPB.

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Thermoplastic Polyimide (TPI)

Cited by 11 publications

References 45 publications

Effects of Nozzle Layout and Parameters on the Jet Characteristics of a CO2 + O2 Mixed Oxygen Lance

Effects of Nozzle Layout and Parameters on the Jet Characteristics of a CO2 + O2 Mixed Oxygen Lance

Preparation and properties of semi-alicyclic thermoplastic polyimide sheets from stereoisomeric hydrogenated pyromellitic dianhydrides and fluorinated diamine

Comparison of properties of carbon reinforced plastic obtained on the basis of semicrystalline polyimideR‐BAPBand other high‐temperature‐resistant thermoplastic matrices

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