How does magnesium oxide affect the scorching performance of rubber?

Magnesium oxide,as an anti coking agent in rubber,can effectively prolong the scorching time of rubber materials,thereby improving the processing safety and stability of rubber.Specifically,the impact of magnesium oxide on the scorching performance of rubber is mainly reflected in the following aspects:

                Magnesium oxide,as an anti coking agent in rubber,can effectively prolong the scorching time of rubber materials,thereby improving the processing safety and stability of rubber.Specifically,the impact of magnesium oxide on the scorching performance of rubber is mainly reflected in the following aspects:

                Adjusting the vulcanization rate:In chloroprene rubber compound,increasing the amount of magnesium oxide and correspondingly reducing the amount of zinc oxide can reduce the vulcanization rate,thereby extending the scorching time.This helps to avoid premature vulcanization of rubber during the processing,which can lead to a decrease in material performance or the production of defective products.

                Improving temperature resistance:Lightweight magnesium oxide can not only improve the high-temperature resistance of fluororubber,but also maintain the processing flowability,physical and mechanical properties,and scorch safety of the rubber material at a certain amount of addition.This is particularly important for rubber products that need to be used in high-temperature environments,such as sealing materials in aviation,chemical and other fields.

                Optimizing crosslinking density:Magnesium oxide plays a dual role in brominated butyl rubber(BIIR)compound,on the one hand as an anti coking agent to prolong the scorching time,and on the other hand as a vulcanizing agent to improve the crosslinking density of the vulcanized rubber.An appropriate amount of magnesium oxide can increase tensile strength,improve heat resistance to air aging,and have little effect on air tightness and fatigue resistance.

                In summary,magnesium oxide has a positive impact on the scorching performance of rubber by adjusting the vulcanization rate,improving temperature resistance,and optimizing crosslinking density.These characteristics make magnesium oxide an indispensable additive in rubber processing.