How to prevent the aging of rubber expansion joints and the causes of aging?

Everything in the world has its life span, and the products are no exception, they also have their own life span, and rubber expansion joints are also one of them. Rubber expansion joints and their products in the process of processing, storage and use, due to the combination of internal and external factors caused by the physical and chemical properties of rubber and mechanical properties of the gradual deterioration, and finally lost the use of value, this change is called rubber aging. The specific appearance of: rubber expansion joints on the surface cracking, sticky, hardening, softening, chalking, discoloration, mold and other conditions.
The role of oxygen, oxygen in rubber with rubber molecules free base chain lock reaction, molecular chain breakage or excessive cross-linking, causing changes in the performance of silicone rubber products - oxidation reaction.
The chemically active oxygen of ozone is much higher and more destructive, and it also causes the molecular chain to break, which is called "ozone cracking".
Increase the temperature can cause thermal cracking of rubber, thus accelerating the speed of rubber oxidation reaction, which is a widespread aging phenomenon - thermal oxygen aging.
The destructive effect on rubber is the high energy of UV rays.
Rubber is easily destroyed when drenched in humid air or immersed in water, which is due to the dissolution of water-soluble substances in rubber and components such as clear water TWM by water extraction.
Prevention methods.
Pay attention to regular inspection in the process of use, and regular maintenance and replacement for some that are used for more than years and aging seriously.
Installation should also pay attention to do in advance to prevent aging measures pay attention to the installation method, used to extend the service life. It should be left in its natural state and should not be installed so that the product is artificially deformed.
As the factors leading to the aging of rubber products are different, therefore, corresponding anti-aging measures should be taken according to different aging mechanisms, mainly physical protection and chemical protection method. Physical protection method is to avoid the interaction between rubber and various aging factors as far as possible, such as the use of rubber-plastic blending, surface plating or treatment, adding light shielding agent, adding paraffin wax, etc. Chemical protection method refers to the active addition of substances to prevent or delay the continuation of rubber aging reaction, such as the addition of amine or phenolic chemical antioxidants.