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Composition and Phase Morphology of Hard/Soft Acrylic Latex Polymers: NMR and AFM Study

机译:硬/软丙烯酸乳胶聚合物的组成和相形态:NMR和AFM研究

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Butyl Acrylate (BA) and Methyl Methacryate (MMA) copolymers with different molar ratios in latex particles lead to segregated hard and soft nanodomains. The presence of both monomers in the hard and soft nanodomains is challenging for traditional techniques for morphology studies such as Transmission Electron Microscopy (TEM) due to lack of atomic contrast. We have used NMR experiments together with statistical analysis of comonomer sequences to determine the composition of the monomers in each phase coupled with Atomic Force microscopy (AFM) to probe the phase morphology and particle sizes. The synergy of the two techniques provides the opportunity to probe interface mixing between the continuous soft phase and the segregated hard phase that has some impact on the final size of the hard and soft phases after film formation.
机译:在乳胶颗粒中具有不同摩尔比的丙烯酸丁酯(BA)和甲基丙烯酸甲酯(MMA)共聚物导致分离的硬和软纳米域。由于缺乏原子对比,对于传统的形态学研究技术(如透射电子显微镜(TEM)),硬和软纳米域中两种单体的存在都是具有挑战性的。我们已经使用NMR实验以及对共聚单体序列的统计分析来确定每个相中单体的组成,并与原子力显微镜(AFM)耦合以探测相的形态和粒径。两种技术的协同作用为探查连续软相和偏析硬相之间的界面混合提供了机会,这对成膜后硬相和软相的最终尺寸有一定影响。

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