Changes during the weathering of polyolefins

• Published in: Polymer degradation and stability Vol. 181; p. 109364
• Main Authors: Grause, Guido, Chien, Mei-Fang, Inoue, Chihiro
• Format: Journal Article
• Language: English
• Published: London Elsevier Ltd 01.11.2020; Elsevier BV
• Subjects: Bolland's cycle; Carbon content; Carbonyl compounds; Carbonyls; Chain scission; Charge transfer; Chemical reactions; cleavage (chemistry); Crosslinking; crystal structure; Crystallinity; degradation; gels; Mechanical properties; Molecular chains; molecular weight; Norrish reactions; Oxidation; Oxygen; Peroxides; Photo-oxidation; photooxidation; Polyethylene; Polyethylenes; Polymers; Polyolefins; Polypropylene; polypropylenes; Seasonal variations; Studies; Ultraviolet radiation; Weathering; weight loss; Weight reduction; PP; XLPE; PLA; Pyro-GC; MAPOE; Mv; Mw; LDPE; HDPE; Photo-oxidation; EPDM; UHMWPE; Polypropylene; DSC; COC; FTIR; XPS; Bolland's cycle; SSA; Polyethylene; ESR; CI; MDPE; MAPE; Norrish reactions; Crystallinity; LLDPE; WAXS; ECO; PE; MAPP; MS-ESI; TREF; PI; MWCNT; HAS; OIT

•A comprehensive review on the reactions causing degradation during weathering and photo-oxidation.•Norrish reactions cause chain scission, but do not initialize photo-oxidation.•Radicals form in the presence of oxygen oxidation products and in the absence cross-links.•Gel formation is often not reg...