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para-aramid fibers

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Book Chapter

By Karl K. Chang
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0009242
EISBN: 978-1-62708-195-5
...Abstract Abstract The chemical composition of Kevlar aramid fiber is poly para-phenyleneterephthalamide. Para-aramid fibers belong to a class of materials known as liquid crystalline polymers. This article discusses the manufacture of aramid fibers and the major fiber forms, such as continuous...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003033
EISBN: 978-1-62708-200-6
... polyethylene fiber (Spectra) produced by AlliedSignal Corporation. Para-Aramid Fiber The chemical composition of Kevlar aramid fiber is poly para-phenyleneterephthalamide. This fiber is known as PPD-T because it is made from the condensation reaction of para-phenylene diamine and terephthaloyl chloride...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003031
EISBN: 978-1-62708-200-6
... are all variations of poly para-phenyleneterephthalamide. Before their introduction, it was not widely suspected that organic polymer fibers having such high levels of strength (up to 3450 MPa, or 500 ksi) and stiffness (132 GPa, or 19 × 10 6 psi) were possible. Aramid fiber is unusual...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003366
EISBN: 978-1-62708-195-5
... (methylene glycol) to produce a methylolphenol: Resoles contain various orthomethylol and para methylol groups, free phenol, free formaldehyde, water, and/or solvent. Resoles do not require an external catalyst and undergo self-polymerization under heat with evolution of water. The versatility...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003416
EISBN: 978-1-62708-195-5
... and aramid do not abrade or “fuzz up” as badly. Typically, loose fiber build-up problems are exacerbated with resin-wetted tow after it exits the resin bath, if tension is applied at the creel. Somewhat closer attention to “housekeeping” is demanded in this circumstance. Tube-packaged fiber is provided...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003350
EISBN: 978-1-62708-195-5
... materials, which can be exploited to create extremely lightweight structures. DRA, discontinuously reinforced aluminum; DRTi; discontinously reinforced titanium; Q/I, quasi-isotropic; P, polyacrylonitrile PAN fibers; A, aramid fibers Fig. 9 Exhaust nozzle of an F414 engine on an F-18 E/F aircraft...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003006
EISBN: 978-1-62708-200-6
... techniques, have provided some thermoplastics such as aramid fibers and high-performance plastics (for example, polyetheretherketone), with very impressive temperature resistance. Some polymers appear to be midway between thermoplastics and thermosets. These materials can be re-formed somewhat...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006374
EISBN: 978-1-62708-192-4
... and para-aramid tend to increase friction when moist. Other materials tend to lower friction in moist environments. Drum brake linings also change in thickness with time when exposed to high-humidity conditions. When the brake lining edges thicken, relative to the center, brake effectiveness increases...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006461
EISBN: 978-1-62708-190-0
... Ultrasonic Rayleigh Waves , Fifth International Conference on Sensing Technology (ICST) , 2011 , p 446 – 451 84. Dayal V. , Chakrapani S.K. , and Barnard D. , Inspection and Evaluation of Dry Fibers in Thick Composites , AIP Conference Proceedings , Vol 1511 , Thompson D.O...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003009
EISBN: 978-1-62708-200-6
... fillers used include glass fiber, carbon, graphite, bronze powder, and molybdenum disulfide. Fluorinated Perfluoroethylene-Propylene Fluorinated perfluoroethylene-propylene, a copolymer of hexafluoropropylene and tetrafluoroethylene, is very similar to PTFE in its chemical inertness, dielectric...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.9781627081955
EISBN: 978-1-62708-195-5
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.9781627082006
EISBN: 978-1-62708-200-6
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003047
EISBN: 978-1-62708-200-6
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.9781627082136
EISBN: 978-1-62708-213-6