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以二氧化硅微球为模板，将其表面修饰上活性官能团。通过表面引发可控/“活性”自由基聚合，连续引发苯乙烯和甲基丙烯酸2-羟基乙酯聚合，得到表面接枝嵌段聚合物的纳米二氧化硅微球，并对其进行表征。将表面修饰的二氧化硅微球用于丙烯酸结构胶体系，并和未修饰二氧化硅微球的体系进行对比。研究结果表明：通过结构表征证明了目标产物合成成功；将表面修饰的二氧化硅微球用于丙烯酸结构胶体系，聚合物改性的纳米二氧化硅在拉伸强度、断裂伸长率和剪切强度等性能的表现均优于未改性的纳米二氧化硅；纳米二氧化硅在固化体系中具有增强增韧的作用，表面接枝聚合物改性后，其性能表现更优。
Abstract：Using silica microspheres as templates,the surface was modified with active functional groups.By initiating controllable/“active” radical polymerization on the surface,and continuous polymerization of styrene and 2-hydroxyethyl methacrylate,nano silica microspheres grafted with block polymers on the surface were obtained,which were then characterized.The surface modified silica microspheres were used in acrylic structural adhesive system and they were compared with the unmodified silica microsphere system.The research results showed that the target product was synthesized successfully through structural characterization. The surface modified silica microspheres were used in the acrylic structural adhesive system,and the performance of polymer modified nano silica in tensile strength,elongation at break,and shear strength was superior to that of unmodified nano silica.Nano silica had the strengthening and toughening effect in the curing system,and its performance was better after surface grafting for polymer modification.
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基本信息:
DOI：10.13416/j.ca.2024.02.006
中图分类号:TQ317;TB383.1
引用信息:
[1]黄冰,孙一童,李海平,等.纳米二氧化硅微球表面接枝嵌段聚合物的制备及其在丙烯酸结构胶体系中的性能研究[J].中国胶粘剂,2024,33(02):57-63+70.DOI:10.13416/j.ca.2024.02.006.
2024-02-28
2024-02-28