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Published: 01 December 2003
Fig. 5 Functioning of gel permeation chromatography More
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Published: 01 December 2003
Fig. 14 Gel permeation chromatogram from a high-performance liquid chromatograph. MWD, molecular weight distribution. Source: Ref 17 More
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Published: 01 April 2004
Fig. 4.38 Predicted time for moisture to permeate various packaging materials in one geometry. Adapted from Traeger [1976 ] More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780105
EISBN: 978-1-62708-281-5
... from Viscosity The principal methods of molecular weight (MW) determination are based on viscosity measurements and chromatography. The latter includes gel permeation chromatography (GPC) and high-performance liquid chromatography (HPLC), which are discussed in the section “ Chromatography...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780089
EISBN: 978-1-62708-281-5
... permeation chromatography and liquid-solid chromatography. Fig. 4 HPLC method sorbent (a) and solvent (b) selection guides. Source: Alltech Associates Gel Permeation Chromatography (GPC) Gel permeation chromatography (GPC), or size exclusion separation, provides component segregation based...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.9781627082815
EISBN: 978-1-62708-281-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780433
EISBN: 978-1-62708-281-5
... ionization detector ber-reinforced polymer Fourier transform infrared complex modulus elastic, or storage, modulus viscous, or loss, modulus loss tangent, or dissipation factor gel permeation chromatography height Planck s constant high-density polyethylene heat-de ection temperature high-impact polystyrene...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930353
EISBN: 978-1-62708-359-1
... in an inert atmosphere chamber. Welding in air, using only gas shielding from the welding torch, results in severe contamination of the weld, with resultant reduced ductility. To minimize moisture permeation and outgassing from the chamber walls, a metal enclosure is superior to a plastic enclosure...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290139
EISBN: 978-1-62708-319-5
... evaporation, or vapor permeation through the pores. The latter is not rate controlling for thin components. On the other hand, thick components exhibit a declining binder-removal rate over time. Early removal is paced by heat penetration and binder melting, but later the slow step is binder vaporization...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780146
EISBN: 978-1-62708-281-5
... bonds between pigments and polymers, corrosives are able to permeate polymer composites. However, this deleterious effect is decreased when coupling agents, such as organosilanes or organotitanates, are present ( Ref 9 ). Pigments, such as carbon black, are inert to corrosives, but hydrophilic fillers...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780343
EISBN: 978-1-62708-281-5
... Gel permeation chromatography (GPC) Weight-average molecular weight, M ¯ w ; molecular weight distribution, MWD Polymer MWD with soluble polymers Low-angle light scattering M ¯ w , MWD M ¯ w for homopolymers, interactions...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030148
EISBN: 978-1-62708-282-2
... high pressures of hydrogen near room temperature. Microperforation occurs predominately in steels. This form of hydrogen damage manifests itself as a network of small fissures that allows permeation of the alloy by gases and liquids. Degradation in Flow Properties Degradation in flow properties...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780359
EISBN: 978-1-62708-281-5
... in molecular weight decreases through such mechanisms as chain scission, oxidation, and hydrolysis, or as increases through destructive cross linking. Because of this, the characterization of molecular weight is an important aspect of a thorough failure analysis. Gel Permeation Chromatography Gel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030215
EISBN: 978-1-62708-282-2
.... A portion of the hydrogen penetrates the vessel or pipeline wall, and the rest of the hydrogen is dissolved in the process fluid or released as gas bubbles. Hydrogen probes measure hydrogen permeation and provide information on the rate of corrosion. Other on-stream corrosion monitoring techniques...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820177
EISBN: 978-1-62708-339-3
... are commonly known hydrogen recombination poisons. Due to the retarding effect of sulfur species on the recombination process, the atomic hydrogen produced by the corrosion process is more likely to reside in the atomic form, become absorbed into the material, and permeate according to its diffusivity...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300163
EISBN: 978-1-62708-323-2
... that the world has since it is the basis of all of the electronics that permeate current life on Earth. Copper makes the circuit boards and conductors as well as the contacts. In fact, electrical contacts are a tribological application that may even be more important than even the other tribological applications...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910407
EISBN: 978-1-62708-250-1
... is formed. This volume expansion results in tensile stresses within the concrete and subsequent spalling and cracking of the concrete. This damage can be a major problem where salt water is in contact with the concrete and permeates the concrete to the steel surface. The problem has been observed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780323
EISBN: 978-1-62708-281-5
.... , The Diffusion and Sorption of Gases and Vapors in Glassy Polymers , The Physics of Glassy Polymers , Havard R.N. , Ed., Applied Science , 1973 , p 504 10.1007/978-94-010-2355-9_10 13. Felder R.M. and Huvard G.S. , Permeation, Diffusion and Sorption of Gases and Vapors , Methods...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630237
EISBN: 978-1-62708-270-9
... that are exposed to elevated temperatures and high-pressure hydrogen. The result can be sudden and catastrophic brittle failure. Atomic hydrogen permeates the steel and reduces iron carbide (Fe 3 C) to form methane (CH 4 ). The methane does not diffuse from the metal, and its pressure may exceed the cohesive...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030292
EISBN: 978-1-62708-282-2
... resistance corrosion measurements, hydrogen permeation monitoring, and online inspection) along with improvements in handling and integration methods of electronic data that are now being introduced. Simultaneously, engineers are getting access to predictive software that rapidly queries complex engineer...