Perfluoroalkylene‐linked aromatic polyimides. II. Further property studies

Critchley, J. P.; White, Mary Ann

doi:10.1002/pol.1972.150100619

Cited by 55 publications

(13 citation statements)

References 12 publications

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“…This second method was chosen by the National Aeronautics Aromatic polyimides synthesized from aromatic and Space Administration (NASA) and Mitsui monomers generally possess excellent thermal Toatsu Chemicals, Inc., and the melt-processable stability and mechanical properties. 1,2 However, polyimides, LARC No. 1500 8,9 and AURUM [10][11][12][13] many of these polymers are insoluble and infuswere produced.…”

Section: Introductionmentioning

confidence: 99%

Thermo-oxidatively stable polyimides and their chemical structures

Tamai¹,

Yamashita²,

Yamaguchi³

1998

J. Polym. Sci. A Polym. Chem.

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Section: Introductionmentioning

confidence: 99%

Thermo-oxidatively stable polyimides and their chemical structures

Tamai¹,

Yamashita²,

Yamaguchi³

1998

J. Polym. Sci. A Polym. Chem.

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“…A variety of structural modifications to the polyimide backbone, such as bulky substituents, 5-7 noncoplanar biphenylene moieties, [8][9][10][11][12] and flexible [13][14][15][16][17] and kinked 18,19 units, can be employed to modify the polymer properties, * To whom correspondence should be addressed. either by lowering the interchain interactions or by reducing the stiffness of the polymer chain.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of New Soluble Polyimides from 3,3‘,4,4‘-Benzhydrol Tetracarboxylic Dianhydride and Various Diamines

Liaw¹,

Liaw²,

et al. 1998

Chem. Mater.

124

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International audienceNew soluble polyimides were prepared from a series of diamines and a tetracarboxylic dianhydride with a benzhydrol unit, 3,3‘,4,4‘-benzhydrol tetracarboxylic dianhydride (BHTDA), by one-step method polymerization. The diamines containing flexible units, bulky substituents, and/or noncoplanar conformation unit were prepared by the reaction of the corresponding bisphenol precursors and p-chloronitrobenzene, followed by catalytic reduction of the dinitro compounds. The polyimides obtained were soluble in various solvents such as N-methyl-2-pyrrolidone, N,N-dimethylacetamide, N,N-dimethylformamide, dimethyl sulfoxide, pyridine, γ-butyrolactone, m-cresol, and even tetrahydrofuran except for polymer PId. The polymers were amorphous and had number-average molecular weight (n) in the range (3.0−10.2) × 104. The glass transition temperatures (Tg) of the polymers ranged from 268 to 341 °C. These polymers exhibited good thermal stability without significant weight loss up to 420 °C. The temperatures at 10% weight loss range from 457 to 524 °C in nitrogen and 449 to 519 °C in air, respectively. The polyimide films were found to be transparent, flexible, and tough. The films had a tensile strength range 72−105 MPa, an elongation range at break of 4−7%, and a Young's modulus range of 2.18−2.85 GP

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“…The imide functional group was appealing because of the superior high temperature performance of Kapton materials. [7] The N-Phenyl-7-oxabicyclo[2.2.1]5-heptene-2,3-dicarboximide (PhNODI) was synthesized from the Diels Alder reaction of furan (2) and N-phenyl maleimide (3). Polymerization of PhONDI to produce polymer 4 was accomplished with the use Grubbs 1st generation ruthenium carbene catalyst as shown in Scheme 1.…”

Section: Introductionmentioning

confidence: 99%

High temperature polymer dielectrics from the ring opening metathesis polymerization (ROMP)

Dirk

Sawyer

Wheeler

et al. 2009

2009 IEEE Pulsed Power Conference

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Recently much research has focused on the development of new polymer dielectric materials to fabricate capacitors for use in the inverters of next generation hybrid electric vehicles (HEV).The capacitors used in HEVs inverters will be required to operate at 150 °C, 600V, and have an energy density of 0.9 J/cm 3 . Polymer based thin film capacitors are ideal for this application due to their relatively high energy density, low cost, and high dielectric breakdown strength. We have polymerized several ring strained monomers using ring opening metathesis polymerization (ROMP) and have identified a promising polymer system based on N-Phenyl-7-oxanorbornene-5,6-dicarboximide (PhONDI). Several of its copolymers with norbornene have been evaluated for possible use as next generation high temperature polymer dielectrics in thin film capacitors. The copolymers were cast into thin films and Au electrodes were deposited on the polymer film. The electrical properties were evaluated as a function of temperature. The polymer system exhibited very good high temperature dielectric properties and is potentially useful as a high temperature capacitor dielectric.

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Perfluoroalkylene‐linked aromatic polyimides. II. Further property studies

Cited by 55 publications

References 12 publications

Thermo-oxidatively stable polyimides and their chemical structures

Thermo-oxidatively stable polyimides and their chemical structures

Synthesis and Characterization of New Soluble Polyimides from 3,3‘,4,4‘-Benzhydrol Tetracarboxylic Dianhydride and Various Diamines

High temperature polymer dielectrics from the ring opening metathesis polymerization (ROMP)

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