{"title":"Photodegradation of crosslinked polyethylene","authors":"Ayako Torikai, Sachiko Asada, Kenji Fueki","doi":"10.1016/0144-2880(86)90035-7","DOIUrl":null,"url":null,"abstract":"<div><p>The photodegradation of crosslinked polyethylene has been studied by ultraviolet (UV) and Fourier transform infrared (FT-IR) spectroscopic techniques and by gel and density measurements. The formation of the diene-type compound as well as of the gel was observed in γ-irradiated polyethylene. The efficiency of photodegradation was estimated from the oxygenated and vinyl group formation observed, and by the change of gel fraction. The photodegradation of crosslinked polyethylene may be initiated by the absorption of a photon by diene-type compounds formed by γ-irradiation. The rate of photo-oxidation and chain scission is faster in crosslinked polyethylene than in uncrosslinked polymer. A photodegradation mechanism for polyethylene crosslinked by γ-irradiation is proposed on the basis of the experimental results.</p></div>","PeriodicalId":101036,"journal":{"name":"Polymer Photochemistry","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0144-2880(86)90035-7","citationCount":"14","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Photochemistry","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0144288086900357","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 14
Abstract
The photodegradation of crosslinked polyethylene has been studied by ultraviolet (UV) and Fourier transform infrared (FT-IR) spectroscopic techniques and by gel and density measurements. The formation of the diene-type compound as well as of the gel was observed in γ-irradiated polyethylene. The efficiency of photodegradation was estimated from the oxygenated and vinyl group formation observed, and by the change of gel fraction. The photodegradation of crosslinked polyethylene may be initiated by the absorption of a photon by diene-type compounds formed by γ-irradiation. The rate of photo-oxidation and chain scission is faster in crosslinked polyethylene than in uncrosslinked polymer. A photodegradation mechanism for polyethylene crosslinked by γ-irradiation is proposed on the basis of the experimental results.
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