What are the performance tests of vulcanized rubber?

Rubber testing includes measuring physical, chemical and mechanical properties. Depending on certain parameters, the purity of the raw material can be analyzed. These parameters include moisture volume, melting point, dry mass volume, percentage of ash content in the rubber, specifications of rubber poisons, acid value, refractive index, etc. From these methods for calculating the mass of raw materials, accuracy and speed are required, and their results should be related to the purity of the material.

melting point

It is a temperature in degrees Celsius. It is the temperature at which the consistency of the material changes, i.e. from solid to liquid. It is one of the common standards used to calculate the purity of compounds. When there is a small amount of dirt in the material, the temperature of the material drops. The melting point of rubber is determined with the help of accelerators, antidegradants, etc. Rubber testing instruments used to measure the melting point include accelerated aging Testers, hot air furnaces, etc.

Dropping Point

It is the temperature at which the rubber material is heated to a certain temperature and softens the material at a certain rate to the point where the designed droplet will fall by its weight. The test is similar to determining the drop point by a circle and a ball, the resulting drop will drop. The dropping point of rubber is determined on resin and asphalt.

Volatile substances

These are compounds that are released from the sample when the temperature is increased. A temperature of 105 °C was used to determine the compound. In most cases, VOCs are expressed in % to the original sample backfill. It is determined in silica, carbon black, organic chemicals such as antidegradants, accelerators, etc.

Dry mass

The dry mass of the rubber is the sample left after defining the volatiles at the appropriate humidity. For original sample backfill it is expressed in %. It is determined in the liquid state of the sample at the time of separation.

Ash content

The ash content consists of organic, non-volatile and non-decomposable compounds at a certain temperature that are part of the sample. It is another major property used to measure the quality of rubber. Due to the decomposition of certain inorganic compounds, the ash volume does not necessarily define the inorganic part which needs to be shared in a very accurate manner. It is expressed as a percentage of the original sample. In order to determine the ash volume, the sample needs to be kept at a temperature of 950 degrees Celsius. It is known as carbon black content, auxiliary rubber additives , organic chemicals, etc. This performance can be tested by a high-quality muffle furnace.

In addition to this, there are many parameters used to measure the properties of rubber. All these characteristics are tested using high-quality test equipment.