​Using Activity to Measure Magnesia

​Using Activity to Measure Magnesia

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  1.    The activity is an important index to measure the magnesium oxide which is used in rubber industry. As one of the primary inorganic active agent, the active magnesium oxide can improve sulphidity a lot.

       For the rubber, magnesium oxide and zinc oxide take the roles of liquidity and antioxidant. They can increase rubber’s tensile strength and impact resistance. The magnesium oxide is an important accessory ingredient of haloid rubber.

       In the chloroprene rubber, magnesium oxide and zinc oxide used as vulcanizing agent. They can play a role of slowing down vulcanization rate and preventing cross-link through lower zinc oxide activity. At the same time, magnesium oxide takes a part of acid acceptor and prevent from scorching and cyclizing. It is usually added at the beginning of mixing. The activity of magnesium oxide(iodine sorption value) really affects coking resistance of CR. In addition, it also has have an effect on tensile strength and hardness. The light magnesium oxide is general type. For example, PVC or glue of CM. Although magnesium oxide is not the main material in rubber, it plays an important part.

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