Journal of Engineering Research

The crystallization behavior of polyethylene terephthalate (PET) significantly influences its mechanical properties. Investigating the methods to control crystallization and the patterns of mechanical property changes can help expand the application areas of PET. Research has found that factors such as temperature and the addition of nucleating agents significantly affect PET crystallization behavior. High temperatures enhance crystallization perfection, but excessively high temperatures can lead to molecular chain degradation; nucleating agents can accelerate crystallization rates and refine grains. Increased crystallinity enhances the tensile strength and modulus of PET, yet excessive crystallinity reduces material toughness. A deeper understanding of these relationships provides a theoretical basis for optimizing PET performance.

Polyethylene terephthalate; Crystallization behavior; Mechanical properties; Regulation factors; Grain structure