A biodegradable thermoplastic polymer has been formulated by solubilizing Murexide (M) salts in a commercial biodegradable vinyl alcohol copolymer (HVA). The Murexide has been employed as a self-healing filler with the aim to impart the auto-repair ability to the formulated material. Three different percentages (1, 3, and 5 mass%) of filler have been solubilized in HVA to evaluate the effect of the filler concentration on the thermal and self-healing properties of the resulting polymeric materials. The samples have been thermally characterized by Differential Scanning Calorimetry (DSC) and Thermogravimetric Analyses (TGA), while their self-healing ability has been evaluated through the estimation of the storage modulus recovery, measured by Dynamic Mechanical Analysis (DMA). The results of DSC analysis have highlighted that the increase of the amount of Murexide anticipates the thermal events such as glass transition, crystallization and melting. TGA measurements have evidenced that, although there is a reduction of thermal stability of the materials in the presence of a high concentration of M, the polymer still remains stable up to 270 °C. Healing efficiency higher than 80%, at a temperature beyond 60 °C, has been detected for the samples loaded with 3 and 5 mass% of Murexide, thus confirming the efficacy of this compound as an auto-repair agent and the relationship between the self-healing efficiency and its amount. For a temperature lower than 70 °C, the healing tests, carried out at different values of tensile deformation frequency, have highlighted a frequency-dependent healing efficiency. This dependence becomes negligible at higher temperatures for which the healing efficiency approaches the value of 100%.

通过将 Murexide (M) 盐溶解在商业可生物降解的乙烯醇共聚物 (HVA) 中配制出可生物降解的热塑性聚合物。Murexide 已被用作自修复填充剂，旨在赋予配方材料自动修复能力。三种不同百分比（1、3 和 5 质量%）的填料已溶解在 HVA 中，以评估填料浓度对所得聚合物材料的热和自愈性能的影响。样品已通过差示扫描量热法 (DSC) 和热重分析 (TGA) 进行热表征，同时通过动态机械分析 (DMA) 测量的储能模量恢复估计来评估其自愈能力。DSC 分析结果表明，Murexide 用量的增加预示着玻璃化转变、结晶和熔化等热事件。TGA 测量表明，尽管在高浓度 M 存在下材料的热稳定性降低，但聚合物在高达 270°C 时仍保持稳定。在超过 60 °C 的温度下，已检测到负载 3 和 5 质量% Murexide 的样品的愈合效率高于 80%，从而证实了该化合物作为自动修复剂的功效与自身之间的关系-愈合效率及其数量。对于低于 70 °C 的温度，在不同的拉伸变形频率值下进行的愈合测试突出了频率相关的愈合效率。