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采用半连续种子乳液聚合方法,制备了以聚苯乙烯(PSt)/有机蒙脱土(OMMT)为核,聚丙烯酸正丁酯(PBA)为壳的核壳纳米复合材料(CSN)。借助傅里叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)考察了CSN的粒子结构及形貌,显示CSN呈球形,核壳结构明显。通过种子用量、核壳质量配比、引发剂用量及单体总量对乳液性能的研究,结果表明,当种子用量为20%,核壳质量配比2∶1,引发剂用量0.6%(wt),单体总量45%(wt)时,乳液的固含量、转化率较高,耐水性、化学稳定性及机械稳定性较好。热重分析(TGA)表明CSN复合材料热稳定性有所提高。
A semi-continuous seed emulsion polymerization method was used to prepare core-shell nanocomposites (CSN) with polystyrene (PSt) / organic montmorillonite (OMMT) as core and polybutylacrylate (PBA) as shell. The particle structure and morphology of CSN were investigated by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that CSN was spherical and its core-shell structure was obvious. The results showed that when the amount of seed was 20%, the mass ratio of core to shell was 2:1, the amount of initiator 0.6% (wt) ), The total monomer content of 45% (wt), the emulsion solids content, high conversion rate, water resistance, chemical stability and mechanical stability better. Thermogravimetric analysis (TGA) showed that the thermal stability of CSN composites increased.