engleski

Photooxidative ageing of low density polyethylene. Kinetics determined by an electrical method

The efficiency of light stabilizers is investigated by electricmethods in the initial stage of photooxidative ageing of lowdensity polyethylene (LDPE). Three types of UV light stabilizersare tried to improve the UV stability of LDPE: a phosphite type(3, 9-bis-((2, 4-di-tert-butyl)phenoxy)-2, 4, 8, 10- tetraoxa-3, 9-diphosphasp iro(5, 5)undecane) a benzophenone type(2-hydroxy-4-octyloxy-benzophenone)and stabilizer based onchelate salt (2, 2-thiobis(4-tert-octyl phenolato)(n-butylamine)nickel(II). LDPE is very susceptible to ultraviolet light. UV light stabilizers improve the stability of low densitypolyethylene for electrical applications, especially the UV stabilizer based on chelate salt.

electric methods ; photooxidative ageing ; polyethylene low density ; stability ; UV-stabilizers

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