第一节重金属钝化剂重金属或称变价金属,其盐类在橡胶老化过程中有两个作用:一是加快橡胶氧化引发过程,并促进过氧化物按游离基机理分解,起到催化作用。因为变价金属离子的特征就是电子的亲和性高,是电子的接受体;二是当变价金属和防老剂生成络合物时,不仅不加快橡胶的氧化,而? Section heavy metal passivator heavy metal or variable-value metal, the salt in the rubber aging process has two roles: First, accelerate the rubber oxidation initiation process, and promote the decomposition of peroxide by the free radical mechanism, play a catalytic role. Because the characteristics of the metal ion price change is the electron affinity is high electron acceptor; Second, when the price of metal and antioxidant complex formation, not only does not accelerate the rubber oxidation,