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Influence of sacrificial bonds on the mechanical behaviour of polymer chains

机译：牺牲键对聚合物链机械行为的影响

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摘要

A growing focus in modern materials science is the attempt to transfer principles found in nature into new technological concepts with the goal of producing novel materials with tailored mechanical properties. One of these principles used in nature is the concept of sacrificial bonding (i.e. non-covalent cross-links that rupture prior to the protein backbone), which is associated with increased toughness in many biological materials. In the present work, the influence of the number and distribution of sacrificial bonds (SBs) on three main mechanical parameters-strength, work to fracture and apparent stiffness-is investigated in a simple model system using computer simulations. The results show that the work to fracture is mainly determined by the number of SBs present in the system, while the apparent stiffness and, to a lesser extent, the strength is altered when the distribution of SBs is changed.
机译：现代材料科学越来越重视将自然界发现的原理转化为新的技术概念，以生产具有定制机械性能的新型材料为目标。在自然界中使用的这些原理之一是牺牲性键合（即在蛋白质主链之前断裂的非共价交联）的概念，这与许多生物材料的韧性提高有关。在当前的工作中，使用计算机模拟在一个简单的模型系统中研究了牺牲键（SBs）的数量和分布对三个主要机械参数-强度，断裂功和表观刚度的影响。结果表明，断裂功主要取决于系统中存在的SB的数量，而当SB的分布改变时，表观刚度和强度在较小程度上会改变。

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