摘要
通过利用透射电子显微镜和原子力显微镜原位加载，观测单一纳米粒子链的力学属性和纳观断裂，发现炭黑粒子链与高分子链缠结和吸附时，其界面强度大于粒子链基体本身的强度，形成的复合团聚体和三维网络能随着基体形变，并通过自身的屈服变形过程吸收大量的能量，从而起到增强增韧作用。
The nanomechanics and nanofracture of a branched aggregate is measured and observed by in-situ loading of its the Nanoparticle chain aggregates （NCA） that carried out in TEM or AFM. These the studies provide information regarding composite deformation mechanisms and interracial bonding between NCA and polymer matrix. One of the advocated reinforcement mechanisms is the formation by the CB of a network interpenetrating the polymer matrix. A two-stage rupture behavior of the composite under tension, including crazing of polymer matrix, and breaking of NCA, is observed. It was found that carbon black NCA reinforce the polymer by hindering cracking extension, reducing stress concentration, and consumes more energy by reorientation of NCA within the matrix.
关键词
炭黑
橡胶
纳米粒子链
原位加载
纳米力学
纳米断裂
carbon black
rubber
nanoparticle chain aggregates（NCA）
in-situ loading
nanomechanics
nanofracture
