Constant temperature aging box
Aging chambers are designed to simulate environmental conditions to evaluate product durability and stability under stressful conditions. International testing standards enable microprocessors to be used in burn-in Test Chambers.
Weathering Test
The so-called "climate aging" test is a research technique that exposes polymer samples to atmospheric conditions to discover the aging law of materials exposed to the air environment, study the characteristics of polymer materials, and estimate their lifespan.
Two tests in climate
One is a natural exposure test. Test samples of polymers will be exposed to atmospheric conditions to observe changes in the material in its natural environment. The aging information collected by this foraging test method is accurate. Effective method for determining the aging behavior of molecular materials; however, testing cycles are lengthy, protracted, and time-consuming.
Another test is the artificial climate age test. Climate testing refers to aging methods that simulate internal real-world atmospheric conditions or increase the strength of specific environmental elements to rapidly create the aging properties of a substance. It is also known as artificial aging or acceleration of the aging process. Artificial weathering is usually carried out in artificial climate chambers. Commonly used synthetic climate chambers include xenon lamps for weathering chambers and fluorescent lamps for testing climates in carbon arc lamp weathering chambers. These Test Chambers for weathering simulate or enhance the aging of materials from important climate variables such as temperature, light, and rain. In addition, aging testing materials should be performed according to specific test specifications.
Hot air aging test
It is one of the important factors leading to the aging of polymer materials. Heat can accelerate the movement of polymer chains. It causes polymer chain scission, generates reactive free radicals and initiates a free radical chain reaction, which leads to polymer degradation or exchange.
The hot air aging test is one of the commonly used tests for evaluating polymer materials and analyzing the aging resistance of polymer materials. It is usually performed in a continuously heated oven in a Test Chamber.
The specifications of the test may dictate the oven temperature. Polymer materials are regularly inspected and sampled as they are exposed to drying elements to understand the aging characteristics and performance of polymer materials so that polymer materials can be altered and improved in a targeted manner.
Alternate Temperature Aging Test
Temperature is another aspect that affects the aging process of polymeric materials. For adhesives made of polymers, high temperatures increase the speed of movement of the polymer adhesive chains, while low temperatures can create internal stress on the adhesive polymer. Alternation leads to chain scission and degradation and aging processes of the polymer binder.
With rubber, extreme temperatures accelerate the movement of molecular chains and cross-link the material. Low temperatures can cause a damaged chain to increase in size, allowing it to break, making it more brittle, and reducing its elasticity and aging.
The high-low temperature alternating test of aging is a test to determine the temperature resistance of polymer materials. It is usually carried out in a temperature alternating Test Chamber, starting from a precise temperature of T1 (usually room temperature) to a specified temperature, at a constant heating rate T2 and maintaining the temperature of T2 for a specified period of time, and then using The same cooling rate lowers the temperature to a specified temperature T3 and maintains that temperature for a specified time, then increases the temperature to T1 and an alternate temperature. The cycle length can be determined according to the specific requirements of the test.
Damp heat aging test
Damp heat test is a reliable method to evaluate the aging resistance of polymer materials under high humidity and high temperature conditions. In high humidity environments, water may penetrate polymeric materials, causing them to swell. Certain hydrophilic compound groups are hydrolyzed, leading to polymer aging and degradation.
In addition, the penetration of water into polymeric materials can also lead to the dissolution and transfer of additives in the polymeric material, including compounds and various other substances, which can affect the mechanical properties of the material.
By using high heat, it facilitates the penetration of water. The heat increases the movement of the polymer chains, reduces the intermolecular forces, facilitates the penetration of water, and accelerates the degradation process of polymer materials.
Different polymer materials have different formulas, and the mechanism of damp heat aging is also different. Before carrying out the damp heat aging test, it is necessary to select different aging standards according to different polymer materials.
The damp heat aging Test Chamber is generally carried out in the damp heat aging Test Chamber, and the humidity and temperature can be adjusted according to the test requirements.
Medium aging test
Certain polymers require prolonged immersion in specific media. For example, polymeric materials found on equipment involved in marine or underwater operations should be submerged in seawater for extended periods of time. Meanwhile, certain parts of aircraft used in aviation need to be exposed to the air for a long time. This requires high molecular polymers to have strong anti-aging dielectric properties.
Dielectric aging testing is a standard testing technique used to evaluate the aging resistance of dielectric polymer materials and predict their lifetime in specific media. The medium used for aging tests can be made according to the environment in which the polymer will be used. It can be salt water, artificial sea water rain, acid-base solution, gasoline oil and various organic solvents.
