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ultraviolet resistance

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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
... to these conditions can be discoloration (fading or yellowing), loss of mechanical strength, embrittlement, loss of electrical insulation and resistance properties, loss of flame retardant properties, and many more. The degree to which a particular material degrades depends on its sensitivity to each of the above...
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
... of the material. This can be color fading by degradation of an organic dye. Yellowing and bleaching reactions can also occur by degradation of the polymer matrix. Hazing, cracking, embrittlement, and chalking are other degradation modes. Examples of other additives that may degrade are ultraviolet (UV) or heat...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001707
EISBN: 978-1-62708-217-4
... and embrittlement Introduction Precipitation hardening stainless steels (PHSS) form a class of materials that possesses an interesting property. These stainless steels can develop high strengths without the loss of ductility and corrosion resistance that is associated with steels of comparable strength...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... resistance of the metal because the sites of the anodic and cathodic reactions are not known, nor are they predictable. However, it is possible to increase the electrical resistance of the electrolyte and thereby reduce corrosion. Very pure water is much less corrosive than impure or natural waters. The low...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006912
EISBN: 978-1-62708-395-9
... lowered the cost and time for determining these data to very reasonable levels. Although most of these properties have been previously discussed, a few additional facts should be stated: Environmental stress-cracking resistance (ESCR) Fatigue Ultraviolet degradation Oxidation Wear...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006925
EISBN: 978-1-62708-395-9
.... Engineering plastics all have, as their principal constituent, one or more synthetic polymer resins and almost universally contain additives. Additives, which have much smaller molecules than polymers, provide color, flexibility, rigidity, flame resistance, weathering resistance, and/or processibility...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0006548
EISBN: 978-1-62708-180-1
... Copyright © 2002 ASM International® All rights reserved. www.asminternational.org ISI in-service inspection ISO International Organization for Standardi- zation J joule J fracture resistance JPEG Joint Photographic Expert Group K stress-intensity factor K stress-intensity parameter DK stress-intensity range...
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: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006913
EISBN: 978-1-62708-395-9
... and defines terms used in connection with testing and specification of plastics for electrical applications. arc resistance electrical applications electrical properties electrical testing plastics PLASTICS have become extremely popular among electrical product manufacturers. Prior...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
... induced in a polyoxymethylene specimen exposed to ultraviolet (UV) light in the laboratory for 1000 h. It should be noted, however, that some polymers are intrinsically more resistant to degradation than others. The following common polymers are ranked with respect to their relative resistance...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006939
EISBN: 978-1-62708-395-9
... and aesthetics after exposure to harsh environmental conditions. It is critical to find a balance between antiscratch properties that do not compromise physical and mechanical properties, such as odor, fogging, surface finish, ultraviolet resistance, color, impact resistance, and so on. Polymers are more...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006909
EISBN: 978-1-62708-395-9
... reducing its resistance to another, analogous to biological systems. For example, the predominant factors in climatic exposure are moisture, temperature, and ultraviolet (UV) radiation. The severity of these factors depends on geographical location and must be considered when designing with polymeric...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
.... It is not practical to increase the electrical resistance of the metal, because the sites of the anodic and cathodic reactions are not known, nor are they predictable. However, it is possible to increase the electrical resistance of the electrolyte and thereby reduce corrosion. Very pure water is much less corrosive...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006922
EISBN: 978-1-62708-395-9
... Chemical resistance Thermal properties Assembly options Many of these benefits come with important considerations. For example, plastics are excellent thermal insulators, but they can expand and contract 5 to 10 times more than metals over the same temperature change. Ignoring this property can...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006865
EISBN: 978-1-62708-395-9
.... Relative resistance of common polymers to photodegradation Table 1 Relative resistance of common polymers to photodegradation Polymer Relative resistance Polymethyl methacrylate n Polyacrylonitrile n Polyoxymethylene m Polyethylene m Polyvinyl chloride n Polystyrene w...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006917
EISBN: 978-1-62708-395-9
... Within the plastic formulation, additional compounds are added for numerous reasons. Examples of such compounds are antioxidants, ultraviolet (UV) stabilizers, processing aids, nucleating agents, pigments and colorants, fillers, and antistatic agents, to name a few. Each compound added to the polymer...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006933
EISBN: 978-1-62708-395-9
... a wide variation in their physical, mechanical, chemical resistance, and aging properties, the use of the wrong resin can yield detrimental results in many applications. Fourier transform infrared spectroscopy is well suited for the identification of polymers that have different molecular structures...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006918
EISBN: 978-1-62708-395-9
... inception, while microscopy of the crack-tip region provides insight into micromechanisms of crack advance. These micromechanisms in turn offer understanding into the inherent toughness or cyclic crack-growth resistance in engineering polymers. It is notable that quasi-static fracture behavior of polymers...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006915
EISBN: 978-1-62708-395-9
... properties such as T m and mechanical properties such as Young’s modulus ( E ). Carbon–carbon single bonds are fairly strong, and they are stable to ultraviolet (UV) light exposure. Carbon–carbon double and triple bonds are shorter and stronger, but they are subject to attack by atmospheric oxygen...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
..., corrosion resistance, heat treatment condition, flaw size, surface finish, bend radius, void content (i.e., in a casting), degree of sensitization, and so forth. Examples of service conditions include magnitude of stress (either cyclic or static), exposure temperature, aggressiveness of environment...