the free radicals reacted with the oxygen, which generated carbonyl groups, hydroperoxides and so on;the free radicals also had cross linking reaction, which generated alkoxy;
(5)木塑料的老化机理为:光和热引发木塑料中木质组分和塑料组分大分子断裂,产的自由基与氧气作用,发化反应成羰基、氢过氧化物等,发交联反应成烷氧基等;