TY - JOUR

T1 - Influence of Carbonyl Fe on Degradation of Epoxy in Ozone Environment

AU - Peng, Guirong

AU - Wang, Haifeng

AU - Wang, Haiyan

AU - Liu, Qiuyun

AU - Hao , Wenguang

PY - 2009

Y1 - 2009

N2 - Carbonyl iron/epoxy coatings are widely used in military as a radar absorbing coating (RAC). The behaviors of RACs under working environments are very important, especially in the new environments such as ozone appeared with widening of the application fields. The effects of ozone degradation on pure epoxy cured with anhydride and the influence of carbonyl Fe on the degradation of epoxy are studied. The results indicate that if the peak at 1,510 cm−1 was used as the inner standard, the intensity of absorption peaks at 1,738, 1,247 and 1,182 cm−1 increases with exposure time for pure epoxy resin, while for the carbonyl iron/epoxy coatings, the three peaks changes insignificantly with the exposure time. The results indicates the oxidation process begins at the hydroxyl and methyl groups, and finally ozonide and carbonyl are formed on the surface for pure epoxy, and epoxy is eroded gradually in depth by ozone. Carbonyl iron could hinder the meeting of ozone with epoxy with dilution or hindrance effect and could protect epoxy resin from ozone and thus delay the deterioration of the coating performance.

AB - Carbonyl iron/epoxy coatings are widely used in military as a radar absorbing coating (RAC). The behaviors of RACs under working environments are very important, especially in the new environments such as ozone appeared with widening of the application fields. The effects of ozone degradation on pure epoxy cured with anhydride and the influence of carbonyl Fe on the degradation of epoxy are studied. The results indicate that if the peak at 1,510 cm−1 was used as the inner standard, the intensity of absorption peaks at 1,738, 1,247 and 1,182 cm−1 increases with exposure time for pure epoxy resin, while for the carbonyl iron/epoxy coatings, the three peaks changes insignificantly with the exposure time. The results indicates the oxidation process begins at the hydroxyl and methyl groups, and finally ozonide and carbonyl are formed on the surface for pure epoxy, and epoxy is eroded gradually in depth by ozone. Carbonyl iron could hinder the meeting of ozone with epoxy with dilution or hindrance effect and could protect epoxy resin from ozone and thus delay the deterioration of the coating performance.

U2 - 10.1007/s10924-009-0133-z

DO - 10.1007/s10924-009-0133-z

M3 - Article

VL - 17

SP - 159

EP - 164

JO - Journal of Polymers and the Environment

JF - Journal of Polymers and the Environment

SN - 1566-2543

IS - DOI 10.1007/s10924-009-0133-z

ER -