Z. Jelcic et al., PHOTOOXIDATIVE AGING OF LOW-DENSITY POLYETHYLENE - KINETICS DETERMINED BY AN ELECTRICAL METHOD, Die Angewandte makromolekulare Chemie, 208, 1993, pp. 25-38
The efficiency of light stabilizers is investigated by electric method
s in the initial stage of photooxidative ageing of low density polyeth
ylene (LDPE). Three types of UV light stabilizers are tried to improve
the UV stability of LDPE: a phosphite type (3,9-bis[(2,4-di-tert-buty
l)phenoxy]-2,4,8, 10-tetraoxa-3,9-diphosphaspiro[5.5]undecane) a benzo
phenone type [2-hydroxy-4-octyloxy-benzophenone] and a stabilizer base
d on chelate 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 density polyethylene for ele
ctrical applications, especially the UV stabilizer based on chelate sa
lt.