To prepare flame-retardant anti-dripping of polyethylene terephthalate (PET) fabric, a hydroxyl-containing cyclic phosphoramide named as 2,2-dimethyl-1,3-propanediol-(2′-hydroxyethyl) phosphoramidate (DPHP) was synthesized and was coated on PET fabric by dip-coating technology. The flame retardancy, non-dripping performance and thermal stability of DPHP-coated PET fabrics were investigated by limiting oxygen index (LOI), vertical flammability, cone calorimetry tests and thermogravimetric analysis (TG). It was found that DPHP can enhance the char forming for PET, which endows the PET fabrics with excellent flame retardancy and non-dripping behavior. Although the LOI had a little increase with low content of DPHP (9.6 % weight gain), the non-dripping performance was observed. With the continuous increase of DPHP content, LOI was increased to 27.6 % and the damaged length was only 7.9 cm. After coating with DPHP, the char-forming ability of PET fabrics was improved and heat release was significantly reduced during the combustion. By analyzing the char residues by SEM-EDX, worm-like appearance and a large amount of phosphorus-based compounds were found in the char residue, indicating that DPHP owns efficient condensed-phase flame-retardant action for PET fabrics. This work suggests that hydroxyl-containing cyclic phosphoramide as a flame retardant is an effective way to develop flame-retardant and anti-dripping PET materials.

为制备聚对苯二甲酸乙二醇酯（PET）织物阻燃抗滴落，合成了一种名为2,2-二甲基-1,3-丙二醇-（2'-羟乙基）氨基磷酸酯（DPHP）的含羟基环状磷酰胺，并通过浸涂技术涂覆在PET织物上。通过极限氧指数（LOI）、垂直可燃性、锥形量热试验和热重分析（TG）研究了DPHP涂层PET织物的阻燃性、不滴落性能和热稳定性。研究发现，DPHP 可以增强 PET 的成炭，赋予 PET 织物优异的阻燃性和不滴落性能。尽管低 DPHP 含量下 LOI 略有增加（9.6% 的重量增加），但观察到了不滴落的性能。随着DPHP含量的不断增加，LOI增加到27。6 %，损坏长度仅为 7.9 厘米。涂有DPHP后，PET织物的成炭能力得到提高，燃烧过程中放热显着减少。通过SEM-EDX分析炭渣，发现炭渣呈蠕虫状，并含有大量磷基化合物，表明DPHP对PET织物具有高效的凝聚相阻燃作用。这项工作表明，含羟基的环状磷酰胺作为阻燃剂是开发阻燃抗滴落PET材料的有效途径。在炭渣中发现蠕虫状外观和大量磷基化合物，表明DPHP对PET织物具有高效的凝聚相阻燃作用。这项工作表明，含羟基的环状磷酰胺作为阻燃剂是开发阻燃抗滴落PET材料的有效途径。在炭渣中发现蠕虫状外观和大量磷基化合物，表明DPHP对PET织物具有高效的凝聚相阻燃作用。这项工作表明，含羟基的环状磷酰胺作为阻燃剂是开发阻燃抗滴落PET材料的有效途径。