A zeolitic imidazolate framework material (ZIF-8) was prepared from stoichiometric zinc nitrate and 2-methylimidazole at room temperature in the presence of ammonium hydroxide. The material was characterized by a series of methods and used as a thermal stabilizer for poly (vinyl chloride) (PVC) film. The properties of the stabilized PVC were investigated using Congo red test, thermal aging test and thermal gravimetric analysis (TGA). Compared with the stabilizing efficiencies of some commonly-used reference stabilizers (e.g. CaSt₂ and ZnSt₂), the stabilizers including ZIF-8 [such as CaSt₂/ZnSt₂/ZIF-8 and ZnSt₂/ZIF-8] exhibit better initial color stability and long-term thermal stability for PVC. The static thermal stability time was significantly prolonged from 33.13 min for PVC/CaSt₂/ZnSt₂ to about 128.92 min for PVC/ZIF-8/ZnSt₂ at 180 °C. The superior performance is attributed to the synergistic effect of ZIF-8 and ZnSt₂. The imidazole ligand of ZIF-8 can strongly absorb hydrogen chloride and form complexes with ZnCl₂ generated from ZnSt₂ in the PVC degradation process. In addition, the double bonds of ZIF-8 may help to form stable compounds with polyenes to further retard the PVC degradation. Dynamic mechanical and tensile properties of the PVC films were also studied.

在室温下在氢氧化铵存在下，由化学计量的硝酸锌和2-甲基咪唑制备沸石的咪唑酸盐骨架材料（ZIF-8）。该材料通过一系列方法进行了表征，并用作聚氯乙烯（PVC）薄膜的热稳定剂。使用刚果红测试，热老化测试和热重分析（TGA）研究了稳定PVC的性能。与某些常用参考稳定剂（例如CaSt ₂和ZnSt ₂）的稳定效率相比，包括ZIF-8的稳定剂[例如CaSt ₂ / ZnSt ₂ / ZIF-8和ZnSt ₂/ ZIF-8]对PVC表现出更好的初始颜色稳定性和长期热稳定性。在180°C下，静态热稳定时间从PVC / CaSt ₂ / ZnSt _2的33.13分钟显着延长到PVC / ZIF-8 / ZnSt _2的约128.92分钟。优异的性能归因于ZIF-8和ZnSt ₂的协同作用。ZIF-8的咪唑配体可以强烈吸收氯化氢，并与PVC降解过程中由ZnSt ₂生成的ZnCl ₂形成络合物。此外，ZIF-8的双键可能有助于与多烯形成稳定的化合物，从而进一步延缓PVC的降解。还研究了PVC薄膜的动态力学性能和拉伸性能。