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)木塑复合材料的老化机理为:光和热引发木塑复合材料中木质组分和塑料组分大分子断裂,产生的自由与气作用,发生支化反应生成羰、氢过化物等,发生交联反应生成等;