It was demonstrated that some level of order exists in glassy poly(ethylene terephthalate) by depolarized light intensity (DLI) technique, but this order is different from that in crystalline PET.

• 不同成核添加剂对PET结晶影响的实验结果表明，在PET的结晶过程中，不摘要太可能存在真正的异相成核剂，添加剂对结晶过程的影响主要源于门）与熔融的聚酯大分于链发生化学反应，使 ET链段构象转变的活化能降低；