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ultraviolet light absorbers

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780329
EISBN: 978-1-62708-281-5
... in plastics, and the factors influencing the rate of degradation. The approaches used to stabilize plastics against photochemical damage, including ultraviolet light absorbers, oxidation inhibitors, and the use of protective coatings, are also considered. References References 1. Wigotsky V...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780153
EISBN: 978-1-62708-281-5
... absorbing Borosilicate Light fastness tests at black panel temperatures from 38–50 °C (100–120 °F) Min 0 0 20 2 165 15 0.15 0.015 0.45 0.040 Max 0 0 50 5 455 40 0.35 0.035 1.25 0.116 6 Natural daylight Horizontal plane (0°) (b) Max 2.0 0.20 66 6 580 55 … … … … 7...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870401
EISBN: 978-1-62708-314-0
... screening. Since all polymers absorb moisture to varying degrees, protective coatings such as paints provide little protection against moisture absorption. However, paint systems are useful in protecting composite structures from ultraviolet (UV) radiation. Ultraviolet radiation is the band of light...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110042
EISBN: 978-1-62708-247-1
... and ultraviolet microscopy and finish with laser microscopy techniques such as TIVA and XIVA. The term Optical Microscopy is commonly limited to light that can be manipulated and focused with lenses, i.e., the visible light spectrum, plus the infrared and ultraviolet. We will not address non-photonic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720183
EISBN: 978-1-62708-305-8
... and imperfections detrimental to part use and function have not developed during processing. Advantages Limitations Description of Magnetic Fields Magnetizing Current Power Sources Methods of Generating Magnetic Fields Magnetic Particles and Suspending Liquids Ultraviolet Light Detectable...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110209
EISBN: 978-1-62708-247-1
... of intramolecular energy transfers. The TTA ligand absorbs the UV light then transfers the energy to the europium ion. While several fluorescence lines are excited, the transition from the Eu 3+ 5 D 0 energy level to the 7 F 2 level generates the bright fluorescence line at 612 nm which is used for FMI...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780146
EISBN: 978-1-62708-281-5
...]</xref> Degradation Detection Chemical Corrosion Environmental Corrosion Photo-Oxidative Degradation Thermal Oxidative Degradation Thermal Degradation Plasticizers Processing Aids, Lubricants, and Impact Improvers Antioxidants and Ultraviolet (UV) Stabilizers Pigments Flame Retardants...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850267
EISBN: 978-1-62708-260-0
... Lamp Carbon Arc Xenon Arc Quartz-Iodine Lamp Zirconium Arc Lamp Mercury Vapor Lamp Bright-Field Illumination Oblique Illumination Dark-Field Illumination Polarized Light Phase-Contrast Illumination Interference Techniques Ultraviolet Microscopy Light-Section...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780404
EISBN: 978-1-62708-281-5
... a polystyrene sample that was deformed past its compressive yield. The section is viewed between cross polars, showing shear bands. 50× Fig. 8 Surface-microcracking network developed on polyoxymethylene due to ultraviolet exposure. 200× Fig. 29 Reflected-light optical micrograph...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910363
EISBN: 978-1-62708-250-1
... Table 4 Advantages and limitations of the principal coating resins Resin type Advantages Limitations Comments Acrylic (solvent based) Excellent light and ultraviolet stability, gloss, and color retention. Good chemical resistance and excellent atmospheric weathering resistance. Resistant...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140201
EISBN: 978-1-62708-264-8
... infrared light, while light with wavelengths shorter is called ultraviolet light. Fig. A6 Variation of electrical field intensity of a light wave of wavelength λ Wavelengths of color bands Table A3 Wavelengths of color bands Color Wavelength band (a) , microns Red 0.65–0.77...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730081
EISBN: 978-1-62708-283-9
.... Glass forming processes are used to obtain the final shape while producing a final product that is resistant to thermal shock because of a very low thermal expansion coefficient. Photosensitive glasses containing microcrystalline silver halides darken with exposure to ultraviolet light and lighten...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240303
EISBN: 978-1-62708-251-8
... radio waves through infrared, the visible, and into approximately the middle of the ultraviolet radiation. However, metals are transparent to high-frequency x- and γ-ray radiation. Most of the absorbed radiation is re-emitted from the surface in the form of visible light of the same wavelength, which...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
... actually dissolve some amorphous thermoplastics. Thus, chemical paint stripping is forbidden on composite structures. Mechanical media blasting is often used on composite structures to remove paint. Other environmental effects include the effect of long-term exposure to radiation. Ultraviolet rays from...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780177
EISBN: 978-1-62708-281-5
... of a transparent plastic. It is measured using a spectrophotometer or a hazemeter in accordance with ASTM D 1003. This method uses a collimated light source, an integrating sphere, and a detector. Measurements are taken on a flat, dust-free test specimen that has a diameter greater than 25 mm (1...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780336
EISBN: 978-1-62708-281-5
... photodecay rates and specifically stated (in Ref 5 ) that E/CO polymers were not biodegradable after ultraviolet light exposure and soil burial. The most widely used plastics, that is, PE, PP, PS, polyurethane (PUR), polyvinyl chloride (PVC), and polyacrylic, are structurally substituted macroalkanes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610549
EISBN: 978-1-62708-303-4
... a high-quality camera and special lenses; alternatively, a large magnifying glass may be used to enlarge a specific area in the photo, such as a crack or other small detail. A metallographic microscope with macro-objectives and lights may be used for somewhat higher magnifications. However, the depth...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910475
EISBN: 978-1-62708-250-1
.... A.2 Optical (light) microscopy Examination of small region or area of either unprepared or polished and normally etched surface at magnification of 25 to 1000×. Normally examination is of a sample cut from the bulk, but on-site examination and replication techniques are possible. Surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550385
EISBN: 978-1-62708-307-2
..., but the amount of absorbed moisture depends on the matrix material and the relative humidity. Elevated temperatures speed the rate of moisture absorption. Absorbed moisture reduces the matrix-dominated mechanical properties. Absorbed moisture also causes the matrix to swell. This swelling relieves locked...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180151
EISBN: 978-1-62708-256-3
.... The magnetically held collection of particles forms an outline of the discontinuity and indicates its size, shape, and extent. Frequently, a fluorescent material is combined with the particles so that discontinuities can be detected visually under ultraviolet light. This method reveals surface cracks...