当前位置:
X-MOL 学术
›
Inorg. Mater. Appl. Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Local and Spatial Structure of Nanofiller in Polymer Matrix and Its Influence on the Properties of Nanocomposites
Inorganic Materials: Applied Research ( IF 0.5 ) Pub Date : 2020-06-17 , DOI: 10.1134/s2075113320030387 P. G. Rizvanova , G. M. Magomedov , G. V. Kozlov , I. V. Dolbin
中文翻译:
聚合物基体中纳米填料的局部和空间结构及其对纳米复合材料性能的影响
更新日期:2020-06-17
Inorganic Materials: Applied Research ( IF 0.5 ) Pub Date : 2020-06-17 , DOI: 10.1134/s2075113320030387 P. G. Rizvanova , G. M. Magomedov , G. V. Kozlov , I. V. Dolbin
Abstract
The structure of a nanofiller in a polymer matrix determines the properties of nanocomposites and a change in the type of structure from local to spatial; for example, formation of the percolation framework of particles (particle aggregates) of a nanofiller leads to a sharp deterioration in the properties of nanocomposites. Using the example of particulate-filled polymer/nanodiamond nanocomposites, it is shown that the transition from the standard mixing mode of a nanofiller with a polymer matrix melt in an extruder to mixing in the flow “breakdown” mode leads to a significant increase in the properties of nanocomposites. It is established that this effect is caused by a change in the type of structure of the nanofiller in the polymer matrix from a continuous spatial one (chain of nanofiller particles) to a local one (formation of individual clusters of nanoparticles). Within the framework of the fractal analysis, it is demonstrated that, when the type of structure changes from one-dimensional to two-dimensional, its fractal dimension changes from 1.18 to 1.75. The quantitative estimates of the degree of reinforcement of nanocomposites carried out within the percolation model with the established increase in the fractal dimension of the structure of the nanofiller are fully confirmed by experimental data. It is also shown that the elastic modulus of the nanofiller depends on the stiffness of the polymer matrix. The experimentally observed effect of dispersion of a nanofiller when mixing components in the “breakdown” mode is described in terms of the model of irreversible aggregation.中文翻译:
聚合物基体中纳米填料的局部和空间结构及其对纳米复合材料性能的影响