Some novel phthalimido thiourea stabilizers 1–4 were readily synthesized. Their structure was elucidated by elemental analysis, FTIR, ¹H‐NMR, and mass spectroscopy. They showed good antimicrobial activity, in particularly the carboxyl derivative, as judged by their high inhibition zone diameter and low minimum inhibition concentration using the agar well diffusion technique. The results reveal the greater stabilizing efficiency of these stabilizers relative to dibasic lead carbonate, Cd‐Ba‐Zn stearate, and n‐OTM reference thermal stabilizers using TG technique in nitrogen. This is well illustrated by the higher initial decomposition temperature and lower rates of both weight loss and discoloration of the polymer during degradation. Moreover, the stabilizing efficiency is influenced by the nature of the substituent group in these stabilizers. While the methyl stabilizer is characterized by a greater efficiency relative to those of the chloro and carboxyl ones, the non‐substituted stabilizer lies between these two cases. The good disperse‐ability of multi‐walled carbon nanotubes (MWCNTs) into the polymeric material was ascertained using FTIR, XRD, SEM, and TEM. The thermal stability of PVC, which stabilized with 4, has been appreciably improved via loading 1 wt% of MWCNTs into its matrices. Further, PVC nanocomposites showed very high inhibition efficiency against Staphylococcus aureus and Escherichia coli.

中文翻译：

---

邻苯二甲酰亚胺硫脲，具有高抗菌性能，可作为稳定剂，以增强负载有多壁碳纳米管的聚氯乙烯的热稳定性

一些新颖的苯二甲酰亚硫脲稳定剂1 - 4被容易地合成。通过元素分析FTIR，¹阐明了它们的结构H-NMR和质谱。它们显示出良好的抗菌活性，尤其是羧基衍生物，这是通过琼脂孔扩散技术的高抑菌圈直径和最低抑菌浓度来判断的。结果表明，相对于二元碳酸铅，Cd-Ba-Zn硬脂酸酯和n-OTM参考热稳定剂，使用TG技术在氮气中这些稳定剂具有更高的稳定效率。较高的初始分解温度和较低的降解过程中聚合物的失重和变色率可以很好地说明这一点。而且，稳定效率受这些稳定剂中取代基的性质影响。尽管甲基稳定剂的效率要比氯和羧基稳定剂高，未取代的稳定剂介于这两种情况之间。使用FTIR，XRD，SEM和TEM确定了多壁碳纳米管（MWCNT）在聚合物材料中的良好分散性。PVC的热稳定性通过将1wt％的MWCNT装载到其基质中，已经明显改善了图4的实施例。此外，PVC纳米复合材料对金黄色葡萄球菌和大肠杆菌显示出非常高的抑制效率。