Displaying 4 results of Polybutylene Terephthalate Impurities Polybutylene terephthalate (PBT) is a thermoplastic polymer that is commonly used in various applications due to its excellent mechanical, electrical, and thermal properties. However, during the production process, impurities may be introduced into the final product, which can affect its performance and quality. Impurities such as residual monomers, oligomers, catalysts, and other additives can cause discoloration, degradation, and reduced mechanical properties. Therefore, it is important to monitor and control the impurity levels in PBT to ensure consistent quality and reliability.