Research on PET Toughening

Polyethylene terephthalate (PET) is a linear thermoplastic engineering plastic. Its molecular structure is regular, easy to be oriented and crystallized. The repeating unit contains rigid benzene rings and polar ester groups, and the ester groups in the molecular chain and The benzene ring forms a conjugated system, which increases the rigidity of the molecule. PET has excellent chemical stability, abrasion resistance, heat resistance and electrical insulation properties, especially good transparency, good insulation and high cost performance. It is widely used in packaging bottles, films, synthetic fibers, electrical appliances, etc. field. With the rapid development of the food and beverage industry. Polyethylene terephthalate (PET) has defects such as slow crystallization speed, long molding cycle, poor impact performance, etc. It is toughened and modified by methods such as elastomers, alloying, core-shell polymers, engineering plastics, and chain extenders. The research direction of PET toughening modification is to achieve the strengthening and toughening of PET.