In situ compatibilization of polypropylene and polystyrene-grafted nano-sized TiO₂ in the presence of Friedel–Crafts catalyst

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• 作者：Lixin Xu ; Mujie Yang
• 关键词：Polystyrene-grafted nano-sized TiO₂ ; Polypropylene ; Friedel– ; Crafts catalyst ; In situ compatibilization ; Resistance to UV aging
• 刊名：Materials Letters
• 出版年：2008
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：30 June 2008
• 卷：62
• 期：17-18
• 页码：2607-2610
• 文件大小：547 K

摘要

In situ compatibilization of polypropylene (PP) and polystyrene-grafted nano-sized TiO₂ (TiO₂-g-PSt) was carried out by melting compounding process in the presence of Friedel–Crafts (FC) catalyst, AlCl₃/styrene(St), to give the PP/TiO₂-g-PSt nanocomposite. The resulting materials were investigated by the Fourier-transform infrared spectra (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and ultraviolet (UV) artificially accelerated aging testing, respectively. The results show that the dispersibility of TiO₂-g-PSt in PP could be improved obviously with the help of FC catalyst, which results in a better resistance to UV aging. The PP/TiO₂-g-PSt nanocomposite containing 2.0 wt.%TiO₂-g-PSt with FC catalyst (AlCl₃/St: 1.0 wt.%/0.3 wt.%) shows a higher percentage of retention in tensile strength, 88.2%, after UV artificially accelerated aging for 15 days.