What Are Heat Stabilizers and Why Do They Matter in Plastics?
In the world of polymers and plastics, heat stabilizers play a crucial role in preserving the integrity and performance of materials exposed to elevated temperatures. These additives are essential, particularly for polymers like polyvinyl chloride (PVC), which are prone to thermal degradation during processing and throughout their lifecycle. Without the protection of heat stabilizers, plastics can become brittle, discolored, and structurally weak, reducing their lifespan and functionality.
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What Are Heat Stabilizers?
Heat stabilizers are chemical compounds added to plastics to prevent or slow down the thermal degradation of the polymer matrix. This degradation typically occurs when the plastic is heated during processing (such as extrusion, molding, or welding) or during use in high-temperature environments. The function of heat stabilizers is to neutralize the effects of heat and prevent the breakdown of polymer chains, which can cause discoloration, embrittlement, and loss of mechanical properties.
In PVC, for example, thermal degradation begins…