Stability of high‐temperature polymers

Arnold, C.

doi:10.1002/pol.1979.230140103

Cited by 171 publications

(69 citation statements)

References 141 publications

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“…Our results are in agreement with this mechanism when we assume that for polymers 2b and 2c some of the detected decomposition products are formed by a subsequent water elimination. The formation of an aromatic compound (benzene) from the cyclohexene structural unit strongly favors the decomposition process and therefore lowers the decomposition temperature compared with, for example, commercial bisphenol A polycarbonate with a decomposition temperature above 450°C [15]. Copolycarbonates 3 contain tertiary diol moieties and therefore show a somewhat different thermal behavior.…”

Section: Thermolysismentioning

confidence: 99%

The effect of structural variations on the properties of polycarbonates susceptible to thermolytic or acidolytic degradation

Gärtner

Nuyken

Voit

et al. 1998

Designed Monomers and Polymers

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Section: Thermolysismentioning

confidence: 99%

The effect of structural variations on the properties of polycarbonates susceptible to thermolytic or acidolytic degradation

Gärtner

Nuyken

Voit

et al. 1998

Designed Monomers and Polymers

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“…Ladder polymers, in which the main chains are bonded together at each repeat unit by a cross-link, serve the same purpose. Polymers with relatively strong main chain bonds and/or with aromatic and heterocylic structural units, are also inherently thermally stable [5]. There are several classes of polymers, such as polyphenylenes, poly(p-phenylene oxide)s, polybenzimidazoles, polybenzamides, that have relatively high thermal decomposition temperatures coupled to low levels of fuel production on degradation.…”

Section: Flammability Characteristics Of Polymeric Materialsmentioning

confidence: 99%

Polymer Combustion as a Basis for Hybrid Propulsion: A Comprehensive Review and New Numerical Approaches

et al. 2011

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Hybrid Propulsion is an attractive alternative to conventional liquid and solid rocket motors. This is an active area of research and technological developments. Potential wide application of Hybrid Engines opens the possibility for safer and more flexible space vehicle launching and manoeuvring. The present paper discusses fundamental combustion issues related to further development of Hybrid Rockets. The emphasis is made on the two aspects: (1) properties of potential polymeric fuels, and their modification, and (2) implementation of comprehensive CFD models for combustion in Hybrid Engines. Fundamentals of polymeric fuel combustion are discussed. Further, steps necessary to accurately describe their burning behaviour by means of CFD models are investigated. Final part of the paper presents results of preliminary CFD simulations of fuel burning process in Hybrid Engine using a simplified set-up. Keywords

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“…They are widely used in high-performance applications, such as buffer coatings and interlayer dielectric materials in the semiconductor industry. Moreover, they are also used for matrix resins, high modulus fibers, and structural adhesives in the aerospace industry [1][2][3][4][5][6][7]. The synthesis of poly(imidebenzoxazole)s to combine the advantages of both is expected, which has been reported in a few articles and patents [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

The properties, morphology and structure of BPDA/ PPD/ BOA polyimide fibers

Huang

Gao²,

et al. 2012

E-Polymers

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A family of random copoly(amic acid)s (coPAAs) containing the 2-(4-aminophenyl)-5-aminobenzoxazole (BOA) moiety were synthesized in DMAc, followed by dry-jet wet spinning process into as-spun PAA fibers. The modified polyimide (PI) fibers were obtained from PAA fibers after imidized and drawn in a furnace. The mechanical properties of fibers were improved by incorporating BOA into BPDA/PPD backbone. SEM photo showed that the cross-section of each stage fibers was round and voids free. Besides, the "skin-core" and microfibrillar structure were not observed. The thermal properties of PI fibers were also investigated. The results showed that the PI fibers owned excellent thermal stability, moreover, the dimensional stability and the microphase separation of fibers were improved by heat-drawn stage. The T g were found to be around 290℃ by TMA and DMA. The X-ray (WAXD and SAXS) experiments indicated that the longitudinal stacks, the molecular orientation and the structural homogeneity of PI fiber were improved in the preparation process of fibers.

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Stability of high‐temperature polymers

Cited by 171 publications

References 141 publications

The effect of structural variations on the properties of polycarbonates susceptible to thermolytic or acidolytic degradation

The effect of structural variations on the properties of polycarbonates susceptible to thermolytic or acidolytic degradation

Polymer Combustion as a Basis for Hybrid Propulsion: A Comprehensive Review and New Numerical Approaches

The properties, morphology and structure of BPDA/ PPD/ BOA polyimide fibers

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