Disclosed is layered double hydroxides (LDH) used to catalyze the polymerization of polyethylene terephthalate (PET). The LDH of a catalyst amount may efficiently reduce the PET polymerization period and further be uniformly blended into the PET product to form composites. Compared with the pure PET, the composite including LDH has better properties such as mechanical properties, linear expansion coefficient, barrier, thermal stability, and transparency. In addition, the LDH in the composite is safer than conventional heavy metal catalysts, especially when applied to food or drink packages.
本发明揭示了一种用于催化聚
对苯二甲酸乙二酯(PET)聚合的层状双氢氧化物(LDH)。催化剂量的LDH可以有效地缩短PET聚合周期,并进一步均匀地混合到PET产品中形成复合材料。与纯PET相比,包含LDH的复合材料具有更好的机械性能、线性膨胀系数、阻隔性、热稳定性和透明度等性能。此外,复合材料中的LDH比传统的重
金属催化剂更安全,特别是在应用于食品或饮料包装时。