水解反应法合成核壳结构聚丁二烯/二氧化硅杂化材料

利用先末端氯硅烷化线形活性阴离子聚丁二烯，然后水解的方法合成了聚丁二烯/二氧化硅(PB/SiO₂)杂化材料，采用红外光谱、GPC和TG分析了PB/SiO₂杂化材料的结构及性能，并用激光粒度仪、TEM、HRTEM分析了PB/SiO₂杂化材料的微相结构，最后对合成PB/SiO₂ 杂化材料的影响因素进行了研究。结果表明：合成的PB/SiO₂杂化材料是具有核壳结构纳米尺寸的颗粒，颗粒尺寸在100nm左右；延长反应时间、减小聚丁二烯分子量及减小SiCl₄ 加入量可使产物中PB/SiO₂杂化材料的摩尔分数增加；H₂O与—Cl 的物质的量之比为2时，产物中PB/SiO₂杂化材料的摩尔分数最大。

Synthesis of core-shell polybutadiene/silica hybrid nanoparticles via hydrolysis

Core-shell polybutadiene/silica (PB/silica) hybrid nanoparticles have been synthesized by hydrolysis of chlorosilane-functionalized PB synthesized by anionic polymerization techniques. The structure and properties of the PB/silica hybrid material were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis and gel permeation chromatography. The microstructure of the PB/silica hybrid material was characterized by laser diffraction particle size analysis, transmission electron microscopy and high resolution transmission electron microscopy. The factors that affect the properties of the product such as reaction time, molecular weight of PB, and the amounts of SiCl₄ and H₂O were varied. The results indicated that the size of the nanoparticles was about 100 nm, and the content of PB/silica hybrid nanoparticles in the product increased with increasing reaction time and with decreasing molecular weight of PB, and on reducing the amount of SiCl₄. When the molar ratio n(H₂O)/n(Cl) was 2, the content of PB/silica hybrid nanoparticles in the product was found to be a maximum.