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将用共沉淀法合成的包覆油酸的Fe3O4纳米粒子,分散在甲基丙烯酸甲酯(MMA)中,采用原位聚合法制备得到PMMA/Fe3O4纳米复合材料,研究了Fe3O4含量对复合材料的玻璃化转变温度(Tg)、溶解性能以及复合材料中PMMA分子量的影响。实验结果显示:复合材料的Tg较纯PMMA有所提高,且随着Fe3O4含量的增大而增高;复合材料的溶解性随着Fe3O4含量的增大逐渐变差,最后出现部分溶胀;随着Fe3O4粒子含量的增加,复合材料中PMMA的分子量逐渐降低。
The co-precipitation method of oleic acid-coated Fe3O4 nanoparticles dispersed in methyl methacrylate (MMA), prepared by in-situ polymerization PMMA / Fe3O4 nanocomposites, Fe3O4 content of the composite material Glass transition temperature (Tg), solubility and PMMA molecular weight in composites. The experimental results show that the Tg of the composites is higher than that of pure PMMA and increases with the increase of Fe3O4 content. The solubility of the composites gradually deteriorates with the increase of Fe3O4 content and finally swells partially. With the increase of Fe3O4 content, With the increase of the content of the particles, the molecular weight of the PMMA in the composite material gradually decreases.