论文标题
固体聚合物混合物中韧性的简单通用图片
Simple generic picture of toughness in solid polymer blends
论文作者
论文摘要
韧性$ \ MATHCAL {T} $可以通过混合另一种兼容和延性聚合物来增强脆性聚合物固体。尽管这种共同的智慧通常是有效的，但缺乏将原子细节与宏观非线性力学联系起来的通用图片。使用全原子和互补的通用模拟，我们展示了脆性聚合物的侧组接触密度之间的微妙平衡$ρ_{\ rm c} $及其在添加第二个组件控制$ \ MATHCAL {T} $时如何稀释。一系列系统遵循$ \ Mathcal {t} $的通用趋势，其中$ {\ rm d}ρ_{\ rm c}/{\ rm d} \ varepsilon $，其中$ \ varepsilon $是张力株。模拟数据与基于平行弹簧类比的简单模型一致。
Toughness $\mathcal{T}$ of a brittle polymeric solid can be enhanced by blending another compatible and ductile polymer. While this common wisdom is generally valid, a generic picture is lacking that connects the atomistic details to the macroscopic non-linear mechanics. Using all-atom and complementary generic simulations we show how a delicate balance between the side group contact density of the brittle polymers $ρ_{\rm c}$ and its dilution upon adding a second component controls $\mathcal{T}$. A broad range of systems follows a universal trend in $\mathcal{T}$ with ${\rm d}ρ_{\rm c}/{\rm d}\varepsilon$, where $\varepsilon$ is the tensile strain. The simulation data is consistent with a simple model based on the parallel spring analogy.
