This work investigates the effect of flame-retardant additives on the thermo-mechanical and dynamic properties of poly(butylene terephthalate) (PBT) vitrimers. The vitrimers were synthesized and compounded in a single step by reactive extrusion from commercially available PBT, an epoxy resin, a zinc-based transesterification catalyst, and aluminum phosphinate (AlPi) as a conventional flame retardant additive. We demonstrated that the presence of AlPi in relatively large amount (20 wt.-%) is compatible with the formation of the vitrimer network and does even play the role of a transesterification (co)catalyst accelerating the exchange reactions and improving the processability of the vitrimer. UL-94 flammability tests also confirm the effective role of AlPi as flame retardant in vitrimer.

这项工作研究了阻燃添加剂对聚对苯二甲酸丁二醇酯 (PBT) 玻璃体热机械和动态性能的影响。vitrimer 是通过市售 PBT、环氧树脂、锌基酯交换催化剂和作为传统阻燃添加剂的次膦酸铝(AlPi)进行反应挤出，一步合成和复合的。我们证明，相对大量（20 wt.-%）的 AlPi 的存在与 vitrimer 网络的形成相容，甚至起到酯交换（助）催化剂的作用，加速交换反应并提高材料的加工性能。维特里默。UL-94可燃性测试也证实了 AlPi 在 vi​​trimer 中作为阻燃剂的有效作用。