A series of PVC films stabilized with novel antimicrobial itaconimido aryl 1,3,4‐oxadiazoles (D1'‐D4'), at absence or presence of various concentrations of multiwalled carbon nanotubes (MWCNTs), was prepared by a conventional solution casting method. D1'‐D4' was prepared via thermal cyclization processes by loss of water for their congruous predecessors itaconimido aryl hydrazides. Elemental analysis and various spectroscopy measurements were used to prove their structures. D1'‐D4' have great antimicrobial activities and some of them showed similar or sometimes higher impact than the reference antibiotic. From TG measurements in nitrogen, they have high thermal stabilities and their decomposition temperatures were above 275–310°C in accordance with substituent groups NH₂ and/or OH incorporated into their structures. They have higher thermal stabilizing efficiencies for PVC in comparison with some industrial thermal stabilizers. Inclusion of 0.1–0.5 wt% MWCNTs into PVC films, that were stabilized with D4', enhanced the composites thermal stability. XRD, SEM as well as TEM were used for ascertaining of incorporation and well dispersion of MWCNTs into PVC matrices. Additionally, the efficacy of stabilization has been proven via a decreased rate of color alteration, mechanical properties change and chains cleavage for PVC. The high antimicrobial and thermal characteristics of these stabilizers afford them a great possibility to secure antimicrobial thermally stable PVC composites. Also, improvement of thermal and mechanical properties of PVC stabilized by D4' after its incorporation with MWCNTs afford a great possibility to its application in different fields where their thermal resistance and high tensile strength resistance play a very important role.

中文翻译：

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使用新型抗微生物的衣康酰亚胺基芳基1,3,4-恶二唑增强填充多壁碳纳米管的PVC的热稳定性

通过常规溶液流延法制备了一系列在新型或多种不同浓度的多壁碳纳米管（MWCNTs）存在或不存在的情况下用新型抗微生物的衣康酰亚胺基芳基1,3,4-恶二唑（D1-D4'）稳定的PVC膜。D1'-D4'是通过热环化工艺制备的，其连续的前体itaconimido芳基酰肼因失水而制备。使用元素分析和各种光谱学测量来证明其结构。D1'-D4'具有很强的抗菌活性，其中一些具有比参考抗生素相似或有时更高的作用。根据氮中TG的测量，它们具有较高的热稳定性，并且根据NH ₂取代基的分解温度在275–310°C以上和/或OH结合到它们的结构中。与某些工业热稳定剂相比，它们具有更高的PVC热稳定效率。用D4'稳定的PVC膜中包含0.1-0.5 wt％的MWCNT，增强了复合材料的热稳定性。XRD，SEM和TEM用于确定MWCNT在PVC基质中的掺入和良好分散。另外，稳定作用的功效已通过减少颜色变化，机械性能变化和PVC链断裂的速率得到证明。这些稳定剂的高抗菌和热特性为它们提供了确保抗菌热稳定PVC复合材料的巨大可能性。此外，通过D4'稳定的PVC的热和机械性能的改善