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以热固性脲醛树脂为壁材,过氧化辛酸酯为芯材,原位聚合法制得粉末状脲醛微胶囊。采用傅里叶红外光谱仪、扫描电镜、透射电镜等对其结构和形貌进行了分析和表征,并利用DSC研究了微胶囊的耐热性及与不饱和聚酯树脂的固化行为。结果表明:合成的微胶囊形貌致密且完整,通过调节原料配比、pH值和转速可以改变微胶囊的熔点。研究微胶囊的固化过程可以发现其对芯材具有保护功能。
Urea-formaldehyde resin as wall material, octanoate as the core material, in-situ polymerization powdery urea-formaldehyde microcapsules. The structure and morphology were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The heat resistance of microcapsules and the curing behavior with unsaturated polyester resin were studied by DSC. The results showed that the morphology of microcapsules was compact and complete, and the melting point of microcapsules could be changed by adjusting the ratio of raw materials, pH and rotating speed. Study of the microcapsule curing process can be found in the core material has a protective function.