Department of Electronic and Quantum Information Transmission Devices, Kazan National Research Technical University n.a. A.N. Tupolev-KAI, Karl Marx St., 10, Tatarstan, 420111 Kazan, Russia.
Radiophisics Department, Kazan Volga-Region Federal University, Kremlevskaya St., 18, Tatarstan, 420018 Kazan, Russia.
Int J Mol Sci. 2023 Jan 28;24(3):2515. doi: 10.3390/ijms24032515.
Agglomeration of distributed particles is the main problem in polymer composites reinforced with such particles. It leads to a decrease in mechanical performance and its poor reproducibility. Thus, development of methods to address the agglomeration of particles is relevant. Evaluation of the size and concentration of agglomerates is required to select a method to address agglomeration. The paper analyzes aluminum oxide particles agglomeration in particles-reinforced polymethyl methacrylate (PMMA) composites. Quantitative parameters of polystyrene-coated aluminum oxide particles agglomerates are obtained for the first time in this article. Unlike uncoated aluminum oxide particles, when coated aluminum oxide particles are used, agglomerates concentration in polymer composites decreases approx. 10 times. It demonstrates that modification of submicron particles by a polymer coating decreases the number of agglomerates in the polymer composite. The use of transmittance and opacity values to estimate particles agglomerates is reasonable in this article. It is shown that the difference in optical performance of specimens reinforced with coated and the original particles is related to the number and average size of agglomerates in the specimens. For example, when the concentration exceeds 0.2%, transmittance values for the specimens reinforced with coated particles are greater than the ones for the specimens reinforced with the original particles.
分散颗粒的团聚是由这些颗粒增强的聚合物复合材料的主要问题。这会导致机械性能下降和较差的重现性。因此，开发解决颗粒团聚的方法是相关的。需要评估团聚体的大小和浓度，以选择解决团聚体的方法。本文分析了颗粒增强聚甲基丙烯酸甲酯（PMMA）复合材料中氧化铝颗粒的团聚。本文首次获得了涂覆聚苯乙烯的氧化铝颗粒团聚体的定量参数。与未涂覆的氧化铝颗粒不同，当使用涂覆的氧化铝颗粒时，聚合物复合材料中的团聚体浓度约降低 10 倍。这表明通过聚合物涂层对亚微米颗粒进行改性可以减少聚合物复合材料中的团聚体数量。在本文中，使用透光率和不透明度值来估计颗粒团聚体是合理的。结果表明，用涂覆和原始颗粒增强的试样的光学性能差异与试样中团聚体的数量和平均尺寸有关。例如，当浓度超过 0.2%时，用涂覆颗粒增强的试样的透光率值大于用原始颗粒增强的试样的透光率值。
