Thermosetting Polyimides

Pater, Ruth H.

doi:10.2115/fiber.50.3_p106

Cited by 16 publications

(23 citation statements)

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Section: Phenylethynyl-terminated Imide Polymermentioning

confidence: 99%

“…Aromatic polyimides, especially acetylene or ethynyl-terminated polyimides, have been extensively studied over the past two decades as candidate resins for advanced applications due to their unique combination of properties [8][9][10][11][12]. In the 1990s a variety of phenylethynyl-in many research areas to study the curing [25], thermal aging [26], crosslinking reaction [5], semi-interpenetrating networks [27,28], as well as structure identification [29,30] of polyimides.…”

Section: Phenylethynyl-terminated Imide Polymermentioning

confidence: 99%

“…Accordingly, polymers that are used to fulfill such high temperature performance should exhibit a high T g or T m and have excellent thermal stability. Even though some polyimides meet the high temperature requirement, their uses have been limited due to processing difficulties, such as poor solubility in common solvents, the release of volatiles, brittleness, and high processing temperature [6,7].Aromatic polyimides, especially acetylene or ethynyl-terminated polyimides, have been extensively studied over the past two decades as candidate resins for advanced applications due to their unique combination of properties [8][9][10][11][12]. In the 1990s a variety of phenylethynyl-DOI: http://dx.doi.org/…”

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confidence: 99%

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Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview

Cho

Drzal²

2016

Carbon letters

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In efforts to characterize and understand the properties and processing of phenylethynylterminated imide (LaRC PETI-5, simply referred to as PETI-5) oligomers and polymers as a high-temperature sizing material for carbon fiber-reinforced polymer matrix composites, PETI-5 imidization and thermal curing behaviors have been extensively investigated based on the phenylethynyl end-group reaction. These studies are reviewed here. In addition, the use of PETI-5 to enhance interfacial adhesion between carbon fibers and a bismaleimide (BMI) matrix, as well as the dynamic mechanical properties of carbon/BMI composites, are discussed. Reports on the thermal expansion behavior of intercalated graphite flake, and the effects of exfoliated graphite nanoplatelets (xGnP) on the properties of PETI-5 matrix composites are also reviewed. The dynamic mechanical and thermal properties and the electrical resistivity of xGnP/PETI-5 composites are characterized. The effect of liquid rubber amine-terminated poly(butadiene-co-acrylonitrile) (ATBN)-coated xGnP particles incorporated into epoxy resin on the toughness of xGnP/epoxy composites is examined in terms of its impact on Izod strength. This paper provides an extensive overview from fundamental studies on PETI-5 and xGnP, as well as applied studies on relevant composite materials.Key words: polyimide, exfoliated graphite nanoplatelets, carbon fiber, composite, properties Phenylethynyl-Terminated Imide PolymerPolyimides have been extensively used in the electronics industry [1] as coatings, films, or adhesives and also in composite applications [2] as a primary or secondary structural material. When incorporated with organic or inorganic fibers, including carbon fibers and glass fibers, they can potentially be applied as a sizing material for high-temperature uses. In advanced applications, one of the most desirable advantages of polyimides, especially the aromatic polyimides, is their excellent high-temperature performance. Their thermal characteristics, including high temperature stability and cure behavior, are critical to successful processing and to the final properties of the resulting polyimide. For aerospace and aircraft applications, advanced polymer materials must successfully maintain their properties at high service temperatures over a long exposure time [3][4][5].The important parameters influencing the heat resistance of a polymeric material are its glass transition temperature (T g ), melting point (T m ), thermal stability, and etc., which may depend on its thermal history. Accordingly, polymers that are used to fulfill such high temperature performance should exhibit a high T g or T m and have excellent thermal stability. Even though some polyimides meet the high temperature requirement, their uses have been limited due to processing difficulties, such as poor solubility in common solvents, the release of volatiles, brittleness, and high processing temperature [6,7].Aromatic polyimides, especially acetylene or ethynyl-terminated polyimides, have been extensiv...

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Section: Phenylethynyl-terminated Imide Polymermentioning

confidence: 99%

Section: Phenylethynyl-terminated Imide Polymermentioning

confidence: 99%

mentioning

confidence: 99%

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Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview

Cho

Drzal²

2016

Carbon letters

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“…It has been found that insertion of fluorinated groups in the polymer backbone could dramatically reduce the polymer chain-to-chain interaction, resulting in improved melt processability. For instance, 1,4-bis(4-amino-2-trifluoro-methylphenoxy) benzene (1,4,, an aromatic diamine which has both fluorinated groups and ether linkage in the chemical structure, has shown advantages in synthesizing aromatic polyimides with both high thermal stability and good solubility [34,35].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Novel Meltable Fluorinated Aromatic Oligoimides Endcapped with 4-Phenylethynylphthalic Anhydride

Chen

Zuo

Fan

et al. 2009

High Performance Polymers

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A series of phenylethynyl-endcapped fluorinated aromatic oligoimides with calculated molecular weights of 1250-10000 were prepared by thermal polycondensation of an aromatic dianhydride, 4,4 1 -oxydiphthalic anhydride (ODPA), with aromatic diamine mixtures of 1,4-bis(4-amino-2-trifluoromethylphenoxy)-benzene (1,4,4-6FAPB) and 3,4 1 -oxydianiline (3,4 1 -ODA) in the presence of 4-phenylethynylphthalic anhydride (PEPA) as reactive endcapping agent. Effects of chemical compositions and molecular weights of the aromatic oligoimides on their meltability as well as the thermal and mechanical properties of the thermal-cured polyimide resins were systematically investigated. The phenylethynyl-endcapped fluorinated aromatic oligoimides could be completely melted in the temperature range of 250-350 2 C to give low viscosity fluids. The melt viscosity of the oligoimide increased with increasing molecular weight. After thermally curing at 371 2 C, the thermoset polyimide resins produced showed good combination of thermal and mechanical properties. For example, the glass transition temperature (T g ) as high as 300 2 C by differential scanning calorimetry, flexural strengths of 1 135.5 MPa, flexural moduli of 1 3.1 GPa, tensile strength of 1 65.7 MPa and elongation at break of 1 3.9% were obtained.

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“…Carbon Fiber reinforced Polyimide (C/PI) and Carbon Fiber Reinforced Bismaleimide (C/BMI)are widely used in hightech applications [1][2][3][4][5][6][7][8][9][10]. All of these materials are chemically classified as high temperature, high performance polyimides.…”

Section: Introductionmentioning

confidence: 99%

Effect of nano-SiO 2 on bismaleimide composite

Geng

Zeng

et al. 2007

SPIE Proceedings

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This paper is concerned with the effect of nano-SiO 2 particles on the thermal stability and mechanical behavior of composite materials. A nano-composite of three components is prepared by polymerizing nano-SiO 2 , chopped carbon fiber and bismalemide resin. The investigation's basic approach involves a blend of experimental and analytical studies to determine structure/property relationship. Nano-composite structures are characterized by dynamic mechanical analysis, and contents of nano-SiO 2 are subsequently correlated with mechanical properties such as tensile and flexural strength also the modulus. The results indicate that the content of nano-SiO 2 exhibits significant improvement on glass transition temperature (Tg) with Tg elevation by increasing concentration of nano-SiO 2 . The higher Tg is the result of steric hindrance by nano-SiO 2 particles in the nano-composite. The mechanical properties of the tensile and flexural strength are raised at first and followed by decreasing as the amount of nano-SiO 2 particles increased. All the modulus values mimic the tensile and flexural strength.

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Thermosetting Polyimides

Cited by 16 publications

References 0 publications

Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview

Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview

Synthesis and Properties of Novel Meltable Fluorinated Aromatic Oligoimides Endcapped with 4-Phenylethynylphthalic Anhydride

Effect of nano-SiO 2 on bismaleimide composite

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