Dr. Ghasemi is one of the prominent professors of the country at the Polymer and Petrochemical Research Institute of Iran.
Discussion title:
PVC's toxicity (thermal stabilizers)
Stabilizers or PVC thermal stabilizers are additives that are used to prevent the destruction and decomposition of polyvinyl chloride (PVC) during its production and use process. These materials are especially important at high temperatures where PVC easily decomposes. In the following, I will provide complete explanations about the level of toxicity, types of stabilizers and their effects on health and the environment. 1. Types of stabilizers: PVC thermal stabilizers are divided into two main categories: Metal stabilizers: They include compounds such as cadmium, lead and tin. These types of stabilizers were widely used in the past due to their high efficiency in preventing PVC decomposition. But due to toxicity and environmental hazards, their use has been severely limited. These types of stabilizers have been introduced as safer alternatives to metal stabilizers and are increasingly being used in the PVC industry.
Metal stabilizers:
Cadmium: This substance is known as a toxic substance and can damage biological systems. Contact with cadmium can lead to breathing problems, kidney damage and even cancer.
Lead: Lead is also a toxic substance that can negatively affect the nervous system and cause problems such as learning and behavior disorders in children.
Non-metallic stabilizers: These types of stabilizers are generally safer than metallic stabilizers. However, some of them may also have negative effects on human health and the environment in large amounts. For example, some organic compounds may cause skin or respiratory sensitivities.
Decomposition and recycling: PVC is difficult to decompose, and if toxic stabilizers are present, its recycling becomes more difficult. This can lead to an increase in plastic waste and environmental problems.
PVC thermal stabilizers play an important role in maintaining the quality and durability of this material. However, their toxicity and environmental effects should be carefully evaluated. The use of non-metallic stabilizers as safer alternatives can help reduce the risks associated with toxicity and contamination. Finally, the correct selection of stabilizers and their proper management in the PVC production process is very important to preserve human health and the environment.