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liquid crystalline polymers

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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 Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.9781627081801
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002464
EISBN: 978-1-62708-194-8
... weight (MW) Softening temperature, °C Character of polymer at 25 °C 1 30 −169 (a) Gas 6 170 −12 (a) Liquid 35 1,000 37 Grease 140 4,000 93 Wax 250 7,000 98 Hard wax 430 12,000 104 Plastic 750 21,000 110 Plastic 1,350 38,000 112 Plastic...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003571
EISBN: 978-1-62708-180-1
... 2430 – 2437 10.1007/BF01184597 31. Hanchi J. , Eiss N.S. Jr. , Tribological Behaviour of Polyetheretherketone, a Thermotropic Liquid Crystalline Polymer and in situ Composites Based on Their Blends under Dry Sliding Conditions at Elevated Temperatures , Wear , Vol 200 , 1996...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006850
EISBN: 978-1-62708-395-9
... Fibre-Phenolic Resin Composite , J. Mater. Sci. , Vol 30 , 1995 , p 2430 – 2437 10.1007/BF01184597 30. Hanchi J. and Eiss, N.S. Jr. , Tribological Behaviour of Polyetheretherketone, a Thermotropic Liquid Crystalline Polymer and in situ Composites Based on Their Blends under...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003441
EISBN: 978-1-62708-195-5
... or, more importantly, in the final fabrication step, all crystalline order is erased (except in unique liquid crystalline polymers). Subsequently, during cooldown, the polymer reestablishes crystalline lattice order. The degree to which this order is reinstated is a function of the viscosity and mobility...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003255
EISBN: 978-1-62708-176-4
... for major classes of nonmetallic engineering materials: metals, ceramics and glasses, intermetallic compounds, polymers, and composites. It details the structures of inorganic crystalline solids, inorganic noncrystalline solids, and polymers. The article describes the various strengthening mechanisms...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003550
EISBN: 978-1-62708-180-1
... Plastic Fuel Gas Pipe Symposium , San Francisco , 3–5 Oct 1989 , p 296 – 320 19. Eisenberg A. , The Glassy State and the Glass Transition, Chap 2 , Physical Properties of Polymers , 2nd ed. , American Chemical Society , 1992 Certain interactions between liquid chemicals...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003023
EISBN: 978-1-62708-200-6
... 90 195 0.19 0.11 34 Polyarylate (PAR) 155 310 … … 0.22 0.125 31 Liquid crystal polymer (LCP) 311 590 220 430 … … 5 Melamine-formaldehyde (MF) 183 360 130 265 0.42 0.24 22 Nylon 6 65 150 75 165 0.23 0.13 25 Nylon 6/6 90 195 75 165 0.25 40...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006369
EISBN: 978-1-62708-192-4
... alternative methods of lubrication. It provides a discussion on the solid materials that have been most commonly used as lubricants: carbon-base materials, transition metal dichalcogenides, polymers, and soft metals. lubrication mechanical systems liquid lubricants greases carbon-base material...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001740
EISBN: 978-1-62708-178-8
... crystal) membrane electrode Glass Membrane Electrodes Liquid or Polymer Membrane Electrodes Solid Crystalline Membrane Electrodes Membrane Potential Determining Electrode Selectivity Calibration Curves Addition Techniques Various Subtraction Techniques Titration Methods...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006676
EISBN: 978-1-62708-213-6
... to the true deformation of materials in practical situations. The sample is held in place only by friction. The sample needs reclamping after cooling. All polymers. Powders (as pressed tablets). Pastes. Viscous liquids (e.g. bitumen, waxes, oils). Shear modulus ( G ′ and G ″) Yields the most...
Book Chapter

By Rebecca Tuszynski
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003011
EISBN: 978-1-62708-200-6
...), glassy, or crystalline phase. Elastomers are typically categorized as amorphous (single-phase) polymers having a random-coil molecular arrangement. After being properly compounded and molded into an engineered product, the material at some point will be subject to an external force. When a solid body...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006650
EISBN: 978-1-62708-213-6
... of interest, for example, 13 C in organic polymers. J-coupling, which is prevalent in liquid NMR, involves spin-spin coupling through bonds, and because this typically is small in magnitude, it is not often observed in solid-state NMR. There are, however, exceptions where utilization of J-coupling in NMR...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006009
EISBN: 978-1-62708-172-6
... crystalline. Monomers that yield regularity—for example, by a sequence of methylene groups or by symmetrical substituents on a ring—will yield crystallinity in the polymer. Accordingly, polybutylene terephthalate or a copolyester consisting of terephthalic and adipic acids and butanediol will exhibit a high...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002460
EISBN: 978-1-62708-194-8
... Properties Key Mechanical Properties for Design against Failure Low-Temperature Strengthening of Crystalline Solids Low-Temperature Strengthening of Polymers Composite Materials Fundamental Characteristics of Metals, Ceramics, and Polymers Crystal Structure and Atomic Coordination...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003421
EISBN: 978-1-62708-195-5
... of a hybrid composite, consisting of SiC fibers (Nicalon) and whiskers in a glass- ceramic-matrix. Source: Ref 20 Fig. 6 Schematic of liquid infiltration processing. The technique is very similar to liquid polymer or liquid metal infiltration Fig. 4 Flow diagram of the reaction bonding...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.9781627082006
EISBN: 978-1-62708-200-6
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006031
EISBN: 978-1-62708-172-6
... it affects toughness and mechanical strength. The characteristics of PVDF depend on molecular weight, molecular weight distribution, extent of irregularities along the polymer chain (including main-chain defect structures and side groups), and crystalline form. Polyvinylidene fluoride is the addition...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005686
EISBN: 978-1-62708-198-6
... is measured ( Ref 5 ). Testing also can be conducted to determine the unique melting point, degree of crystallinity, and glass transition temperature of a polymer. Both DTA and DSC techniques can be used to investigate the thermal properties of materials, including polymers, biological materials, inorganics...