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photooxidation

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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 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: 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: 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...