The preparation of self-healing polymers for use following mechanical failure using commercial, bio-based polymers without complex synthesis and expensive healing reagents has been very rare. In this study two commercial, bio-based polymers, natural rubber (NR) and polycaprolactone (PCL), were melt-blended to form NR/PCL blends. To increase the healing efficiency via supramolecular hydrogen bonding interactions, various amounts of acrylic acid were grafted onto the PCL. The results showed that the healing efficiency of the blends in the self-healing test at 80°Cwas higher than for blends at 60 °C due to higher molecular mobility/diffusion resulting from the molecular motions above the melting temperature of PCL which was near 55 °C in all cases. The highest healing efficiency, 62.8%, was attained for the NR/PCL-g-4AA (40/60) blend containing 4 phr PCL of AA. In addition, with the application of the shape memory-assisted self-healing (SMASH) mechanism, the healing efficiency increased further, up to 79.9%. The high shape recovery ratio (>90%) helped the crack to close faster when the sample was heated to trigger the shape memory process, leading to the increased healing efficiency in comparison with the sample without the shape memory process triggered by heating. To the best of the authors’ knowledge, there have been no similar works in the preparation of self-healing, bio-based polymer blends through the current approach so far. We suggest the synergistic effects of both the physical and chemical processes applied to commercial, bio-based polymers provide the chance of expanding the applications of these green polymers with additional functionality.

在没有机械合成的情况下，使用商业化的，基于生物的聚合物而没有复杂的合成方法和昂贵的治疗试剂来制备可在机械故障后使用的自愈聚合物非常罕见。在这项研究中，将两种商业化的生物基聚合物天然橡胶（NR）和聚己内酯（PCL）熔融共混以形成NR / PCL共混物。为了通过超分子氢键相互作用提高治愈效率，将各种数量的丙烯酸接枝到PCL上。结果表明，共混物在80°C的自愈试验中的愈合效率高于60°C的共混物，这是由于分子运动高于PCL熔融温度（接近55）导致更高的分子迁移率/扩散在所有情况下均为°C。最高的治愈率62.8％，对于含有4phr PCL的AA的NR / PCL-g-4AA（40/60）共混物，获得了“ A”。此外，随着形状记忆辅助自我修复（SMASH）机制的应用，治愈效率进一步提高，最高达到79.9％。当样品被加热以触发形状记忆过程时，高的形状恢复率（> 90％）帮助裂纹更快闭合，与没有通过加热触发形状记忆过程的样品相比，修复效率提高了。据作者所知，到目前为止，在通过目前的方法制备自修复的生物基聚合物共混物中还没有类似的工作。我们建议将物理和化学过程应用于商业领域的协同效应，