test project

 high temperature test

       reference standard

       GB/T 2423.2-2008; IEC 60068-2-2: 2007

       capabilities

       +250℃，1m×1m×1m

High temperature testing is a method used to determine the adaptability of a product to storage, transportation, and use in a high temperature climate environment. The severity of the test depends on the high temperature and duration of exposure. High temperature testing of polymer materials such as plastics, rubber, paints and varnishes mainly includes hot air aging, heat resistance testing, and heat resistance determination. Hot air accelerated aging means that the specimen is exposed to a higher temperature than the rubber use environment, in order to obtain the effect of natural rubber aging in a short period of time. Heat resistance test refers to the test in which the specimen is exposed to the same temperature change as the rubber environment.

In general, short-term exposure of plastics to high temperatures releases volatile substances such as moisture, solvents or plasticizers; reduces molding stress; improves curing of thermoset plastics; improves crystallinity; and causes plasticizers or colorants or both to change color. Generally, progress and contraction will occur as volatiles decrease or further polymerization reactions occur. Certain plastics, such as PVC, may be deformed due to loss of plasticizers or broken surfaces of polymer molecular chains. Polypropylene and its copolymers tend to become very fragile when the molecules degrade, while polyethylene becomes soft before tensile strength and elongation decrease and embrittlement. Therefore, it is necessary to study the performance of components and equipment such as plastics, rubber, paints and varnishes, polymer materials, and circuit boards at high temperatures.