How to distinguish the aging of rubber in ozone-resistant aging test chamber?

If one or more of the following items appear when the rubber product is tested in the ozone-resistant aging test chamber, it is enough to indicate that it has aged. There are also many classifications of rubber, so the varieties will be different, and the aging phenomenon will be different due to different storage or use. Although rubber aging is various and varied. But the whole is judged by the following five aspects.

 

Changes in electrical properties: insulation resistance, dielectric loss, conductivity, breakdown voltage, dielectric constant, etc. Changes in mechanical properties: constant tensile stress, tensile strength, elongation, permanent deformation, flexural fatigue strength, tear Changes in strength, hardness, wear resistance, elasticity, etc.;

 

Appearance changes: brittleness, blistering, loss of light, discoloration, stickiness, cracking, mildew, hardening, chalking, delamination, etc.;

Changes in physical and chemical properties: changes in cold resistance, solubility, density, swelling ratio, gel amount, molecular weight, reaction products, medium resistance, heat resistance, permeability resistance, etc.;

 

Other performance changes: such as changes in optical performance such as light transmission, reflection, light absorption, etc., changes in acoustic performance, such as sound transmission, anti-sound, sound absorption, and changes in magnetic conductivity.

 

There are many forms of situations, and problems related to dealing with them will also be solved as different situations arise. For the problem of rubber ozone aging resistance, it is necessary to find and solve the corresponding problems in the above changes, find out the existence of the problem in time during the test, find out the corresponding way to solve it in time, and the results will be more timely.