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photooxidation

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Published: 15 May 2022
Fig. 5 Schematic photooxidation or autooxidation cycle More
Image
Published: 15 May 2022
Fig. 6 Photooxidation schemes. (a) Norrish type I reactions form carboxylic acids and esters. (b) Norrish type II reactions lead to scission of a polymer chain into two parts; a chain-end ketone group and a terminal double bond. More
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Published: 15 May 2022
Fig. 7 Photooxidation mechanism of polypropylene More
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Published: 15 May 2022
Fig. 8 Photooxidation mechanism of polymethyl methacrylate showing intramolecular and intermolecular association of hydroxyl groups with other hydroxyl groups or with ester groups by hydrogen bonding More
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Published: 15 May 2022
Fig. 11 Photooxidation of polyenes (photobleaching) More
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Published: 15 May 2022
Fig. 13 Induced photooxidation of polycarbonates (aliphatic part) More
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
... hydroperoxides resulting in two macroradicals Fig. 5 Schematic photooxidation or autooxidation cycle Fig. 6 Photooxidation schemes. (a) Norrish type I reactions form carboxylic acids and esters. (b) Norrish type II reactions lead to scission of a polymer chain into two parts; a chain-end...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003028
EISBN: 978-1-62708-200-6
... to elevated temperatures for an extended period of time. It concludes by describing various degradation processes, namely, thermal degradation, thermal oxidative degradation, photooxidative degradation, environmental corrosion, and chemical corrosion and discussing the ways of detecting these degradation...
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
... of electrical properties, such as insulation resistance, dielectric constant, power factor, and dielectric strength. Although most plastic materials react slowly with atmospheric oxygen, elevated temperature or UV radiation can accelerate oxidation processes (thermal or photooxidation, respectively). Many...
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
.... , Vol 206 , 2005 , p 575 10.1002/macp.200400395 13. Bellenger V. and Verdu J. , Photooxidation of Amine Crosslinked Epoxies, Part 2: Influence of Structure , J. Appl. Polym. Sci. , Vol 28 , 1983 , p 2677 10.1002/app.1983.070280901 14. George G.A. et al...
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
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003525
EISBN: 978-1-62708-180-1
... of thermal oxidation, vinyl, vinylene functionality for photooxidation, and hydroxyl group formation indicating hydrolysis ( Ref 4 ). Case studies showing the effectiveness of FTIR in assessing molecular degradation are presented in examples 1 , 13 , and 15 in this article. Chemical Contact...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003692
EISBN: 978-1-62708-182-5
... methacrylates. The ultraviolet resistance of the acrylate is somewhat lower than that of the methacrylate because of the presence of a tertiary hydrogen attached directly to a carbon comprising the molecular backbone. This active hydrogen is vulnerable to photooxidative and thermooxidative attack. Consequently...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006919
EISBN: 978-1-62708-395-9
... in which the component will function. Engineers must then assess the effects that the chemical associated with the environment will have on the plastic. Photooxidation of unsaturated rubber (a component of most rubber-toughened polymers) due to exposure to the ultraviolet component of sunlight ( Ref 67...