以三聚氰胺和甲醛为聚合单体,甲醇和水为分散介质,甲酸为引发剂,采用分散聚合法制备了单分散性的大粒径三聚氰胺-甲醛树脂(MF)微球。通过改变反应中的醇水比例、单体摩尔比、甲酸稀释液的用量和反应温度,得到了粒径在3～9μm的微球。采用扫描电镜、红外光谱、热重分析等测试方法进行表征,结果显示,当三聚氰胺用量为0.5g,反应温度为85℃时,制备的MF微球的结构与单分散性最佳,球体表面光滑,分散最均匀。
The monodispersed melamine formaldehyde(MF) microspheres with large particle size were synthesized by melamine and formaldehyde when formic acid was added in solution.MF microspheres with diameter ranging from 3 to 9μm were obtained by changing the ratio of alcohol to water,the molar ratio of monomer,the amount of dilute formic acid and the reaction temperature.It was characterized by scanning electron microscope (SEM),fourier transform infrared spectroscopy (FT-IR),X-ray diffraction(XRD) and other testing methods.The results showed that when the dosage of melamine was 0.5g,the reaction temperature was 85℃,the sphere surface of MF microspheres was smooth and very uniform.
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基金资助
湖北省自然科学基金(2014CFB785)
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