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ultraviolet light absorbers

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Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001731
EISBN: 978-1-62708-178-8
... Structure Ultraviolet/visible absorption spectroscopy is almost exclusively the spectroscopy of molecules dissolved in solvents (most atoms in the gas phase also absorb in this spectral region; however, this is the province of atomic absorption spectroscopy, as described in the article “Atomic...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006920
EISBN: 978-1-62708-395-9
... 10.1021/ma100453d Hindered Amine Light Stabilizers Ultraviolet Protective Coatings Hydroperoxide Decomposers Proton Donors Quenchers Ultraviolet Absorbers: Pigments Organic UV Absorbers Ultraviolet Stabilization of Polymeric Materials Polyamides Temperature Influences...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009084
EISBN: 978-1-62708-177-1
... Abstract Polymer composite materials are subject to degradation if not appropriately protected from the environment. This article describes the effects of heat and atomic oxygen and ultraviolet-light on composite material surfaces, with illustrations. atomic oxygen composite material...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003844
EISBN: 978-1-62708-183-2
... coatings coating degradation permeation molecular composition PAINTS AND PROTECTIVE COATINGS are by far the most common means of protecting materials from deterioration. Besides protection, coatings add color, beautify, provide light reflectivity, camouflage, reflect heat, absorb heat, and provide...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006871
EISBN: 978-1-62708-395-9
...) >380 Fading 370–385 Increasing ultraviolet sensitivity (extended exposure) Polyacrylate 385 Yellowing Polyamide (aromatic) 360–370, 415 Yellowing Polypropylene 340–380 Creation of carbonyl groups 360–380 Decreasing tensile strength Polyurethane (aromatic) 350–415 Yellowing...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005672
EISBN: 978-1-62708-198-6
...., ultraviolet or visible light initiation). This article provides an overview of curing techniques, adhesive chemistries, surface preparation, adhesive selection, and medical applications for adhesives. Curing Techniques <xref rid="a0005672-ref2" ref-type="bibr">(Ref 2...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003028
EISBN: 978-1-62708-200-6
... their total energy can be absorbed within a few micrometers of the surface. Ultraviolet radiation absorption on the surface of a material can result in chalking, which is a surface film that breaks molecular bonds. Ultraviolet radiation also causes discoloration (yellowing and bleaching) and loss...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0005692
EISBN: 978-1-62708-178-8
... in the intensity of the beam ac noncapacitive arc. A high-voltage elec- of the response to measurement (for ex- (light, x-rays, electrons, and so on) when trical discharge used in spectrochemical ample, emission, absorbance, and con- passing through matter. In many cases analysis to vaporize the sample material...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006073
EISBN: 978-1-62708-172-6
.... Recently, however, experience has shown that there is sufficient radiation and penetration of UV light as low as 280 nm to cause deterioration of paint. Ultraviolet radiations below this wavelength are not considered detrimental, because they are generally absorbed by moisture and other small molecules...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001730
EISBN: 978-1-62708-178-8
... corresponding to the difference in energies between the ground state and an excited state of the analyte element is passed through the atomizer. This light is generated by a low-pressure electrical discharge lamp containing a volatile form of the analyte element. Free analyte atoms within the atomizer absorb...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003035
EISBN: 978-1-62708-200-6
... and mechanical properties, including catalyst, fillers, thickeners, pigments, thermoplastic polymers, flame retardants, and ultraviolet absorbers. It talks about the mixing techniques available for SMC resin pastes, including batch, batch/continuous, and continuous mixing. The article also outlines the design...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006653
EISBN: 978-1-62708-213-6
... for absorption measurements to only a few millimeters. The measured absorbance is proportional to the number of absorbing species (i.e., gaseous atoms) within the optical viewing volume ( Ref 1 , 6 ). Therefore, the absorbance is related to both the path length of the incident light within the metal atom...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003231
EISBN: 978-1-62708-199-3
... inspection. The developer does not produce indications but simply absorbs the penetrant already present in or at the flaw and makes it more visible. Equipment Requirements With the exception of a source of ultraviolet (black) light for use with fluorescent penetrants, there is no special...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001778
EISBN: 978-1-62708-178-8
...-through spectrophotometric cell as a detector broadens the capabilities of ion chromatography. In this mode of detection, the spectrophotometer is set to direct a given wavelength of ultraviolet or visible light through the detecting cell. Any material flowing through the cell that absorbs this wavelength...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006748
EISBN: 978-1-62708-213-6
... of absorbing unwanted electromagnetic tron microscopy and synchrotron radiation. radiation and transmitting the remainder. A neutral density lter attenuates relatively eyepiece. The lens system used in an optical uniformly from the ultraviolet to the infra- instrument for magni cation of the image red...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001777
EISBN: 978-1-62708-178-8
... phase. The ultraviolet/visible (UV/VIS) absorbance detector is currently the most popular detector of this type because most compounds absorb 190- to 700-nm wavelength radiation, and many other compounds that have no absorption can be chemically reacted to form an absorbing species. There are three...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003432
EISBN: 978-1-62708-195-5
... functionality, which is useful in differentiating epoxies with similar EEWs. A thin film of resin is placed on a crystal, and IR light is passed through the crystal and film at varying frequencies. Functional groups absorb at certain defined frequencies. The test is usually qualitative, but because absorption...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003232
EISBN: 978-1-62708-199-3
... as the base for wet particles. For increased visibility, particles are coated with fluorescent pigment by the manufacturer. Inspection is conducted in total or partial darkness, using ultraviolet light to activate the fluorescent dyes. Inspected surfaces should be illuminated with a minimum of 1000 μW/cm...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006051
EISBN: 978-1-62708-172-6
...) Reactive diluents Butyl glycidyl ether, C12-C14 aliphatic glycidyl ether, cresyl glycidyl ether, 2-ethylhexyl glycidyl ether Polyurethane Ultraviolet absorbers Titanium dioxide, zinc oxide, cerium oxide, hindered-amine light stabilizers Waterborne polymer Surfactants Polyethoxylated octyl phenol...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003239
EISBN: 978-1-62708-199-3
...-gloss appearance when viewed with oblique illumination. Thermally Quenched Phosphors Thermally quenched phosphors are organic compounds that emit visible light when excited by ultraviolet light. The brightness of a phosphor is inversely proportional with temperature over a range from room...