Polymers, High-Temperature

Parker, David G.; Bussink, Jan; Grampel, Hendrik T. van de; Wheatley, G. W.; Dorf, Ernst‐Ulrich; Ostlinning, Edgar; Reinking, Klaus; Schubert, Frank; Jünger, Oliver; Wagener, Reinhard

doi:10.1002/14356007.a21_449.pub4

Cited by 14 publications

(15 citation statements)

References 51 publications

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“…The invention of thermoplastic polyetherimides (PEI) obtained by adding ‘hinged’ oxygen atoms to repeating links consisting of aromatic and heterocyclic fragments was a breakthrough in chemical engineering [ 9 , 10 ]. In this case, the basic PI properties (excellent physical and mechanical characteristics, as well as great onset decomposition temperatures) are retained, and their chain flexibility was enhanced [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Transfer Film on Tribological Properties of Anti-Friction PEI- and PI-Based Composites at Elevated Temperatures

et al. 2022

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The structure, mechanical and tribological properties of the PEI- and PI-based composites reinforced with Chopped Carbon Fibers (CCF) and loaded with commercially available micron-sized solid lubricant fillers of various nature (polymeric-PTFE, and crystalline-Gr and MoS2) were studied in the temperature range of 23–180 (240) °C. It was shown that tribological properties of these ternary composites were determined by the regularities of the transfer film (TF) adherence on their wear track surfaces. The patterns of TFs formation depended on the chemical structure of the polymer matrix (stiffness/flexibility) as well as the tribological test temperatures. Loading with PTFE solid lubricant particles, along with the strengthening effect of CCF, facilitated the formation and fixation of the TF on the sliding surfaces of the more compliant PEI-based composite at room temperature. In this case, a very low coefficient of friction (CoF) value of about 0.05 was observed. For the more rigid identically filled PI-based composite, the CoF value was twice as high under the same conditions. At elevated temperatures, rising both CoF levels and oscillation of their values made it difficult to retain the non-polar PTFE transfer film on the sliding surfaces of the PI-based composite. As a result, friction of the ceramic counterpart proceeded over the composite surface without any protecting TF at T ≥ 180 °C. For the sample with the more flexible PEI matrix, the PTFE-containing TF was retained on its sliding surface, providing a low WR level even under CoF rising and oscillating conditions. A similar analysis was carried out for the less efficient crystalline solid lubricant filler MoS2.

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Section: Introductionmentioning

confidence: 99%

Effect of Transfer Film on Tribological Properties of Anti-Friction PEI- and PI-Based Composites at Elevated Temperatures

et al. 2022

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“…Such polymers exhibit enhanced servicetemperatures and outstanding resistance to environmental stress [1]. With the coming into market of polymers that have such significantly enhanced properties as compared to common ones, the terms "high performance" or "advanced engineering" have been employed to describe them [2].…”

Section: Introductionmentioning

confidence: 99%

Thermal Degradation and Fire Behavior of High Performance Polymers

2019

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“…Consequently, APA6 is more appropriated to produce high‐performance PA6 as hydrolytically polymerized PA6 because molecular mass and crystallinity of APA6 are higher . Low process costs Polyamide 6 is the most commonly used type of polyamides and because of this, ε‐caprolactam is a cheap material particularly in comparison to PEEK or PPS (sales price ratios (nylon: high‐temperature polymers like PEEK and PPS) = 1:3 to 1:20). Also, the manufacturing process is cheap because only minutes are needed for the anionic polymerization of ε‐caprolactam .…”

Section: Resultsmentioning

confidence: 99%

Hexaphenoxycyclotriphosphazene as FR for CFR anionic PA6 via T‐RTM: a study of mechanical and thermal properties

et al. 2016

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Summary The production of carbon fiber reinforced (CFR) anionic polyamide 6 (APA6) plates by thermoplastic resin transfer molding (T‐RTM) processing is highly sensitive to the presence of polymer additives such as flame retardants (FRs). However, APA6 is flammable, and therefore, it is mandatory to protect the polymer matrix, especially if the produced materials are intended for aerospace applications. Typically used FR for PA6 cannot be incorporated in the T‐RTM processes. With hexaphenoxycyclotriphosphazene, an incorporable and effective FR additive for CFR APA6 was discovered. Cone calorimetry measurements indicate a char formation‐based mechanism, and the flame retardancy was further confirmed with limiting oxygen index tests, classification by UL94 (V‐0), and FAR25 tests. The influence of this FR on the thermal (thermogravimetric analysis and differential scanning calorimetry) and mechanical behavior (flexural, compressive and ultimate tensile strength, and Charpy impact tests) on CFR APA6 produced via T‐RTM processing is evaluated and indicates no interaction with the APA6; it works as a passive filler. Copyright © 2016 John Wiley & Sons, Ltd.

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Polymers, High-Temperature

Cited by 14 publications

References 51 publications

Effect of Transfer Film on Tribological Properties of Anti-Friction PEI- and PI-Based Composites at Elevated Temperatures

Effect of Transfer Film on Tribological Properties of Anti-Friction PEI- and PI-Based Composites at Elevated Temperatures

Thermal Degradation and Fire Behavior of High Performance Polymers

Hexaphenoxycyclotriphosphazene as FR for CFR anionic PA6 via T‐RTM: a study of mechanical and thermal properties

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