In situ compatibilization between polystyrene-grafted nano-sized TiO2 and polypropylene with Friedel-Crafts catalyst
✍ Scribed by Lixin Xu; Mujie Yang
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 453 KB
- Volume
- 114
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
Abstract
The application of Friedel‐Crafts (FC) alkylation reaction to the in situ compatibilization between polystyrene‐grafted nano‐sized TiO~2~ (PS‐grafted TiO~2~) and polypropylene (PP) was assessed. The PS‐grafted TiO~2~ was first prepared via dispersion polymerization of styrene (St) using 3‐(trimethoxysilyl) propyl methacrylate treated nano‐sized TiO~2~ (MPS‐treated TiO~2~) as cores, and then dispersed within PP by melt blending with different contents of FC catalyst, AlCl~3~/St, to give PP/PS‐grafted TiO~2~ nanocomposites. The dispersion of PS‐grafted TiO~2~ in PP and interfacial adhesion of PP/PS‐grafted TiO~2~ nanocomposites were characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM), respectively. The results indicated that the dispersion of PS‐grafted TiO~2~ in PP could be improved, with an enhancement of interfacial adhesion between TiO~2~ and PP, by introducing FC catalyst with adequate concentration, which led to a better thermal stability and resistance to ultraviolet (UV) aging of PP/PS‐grafted TiO~2~ nanocomposites. The effect of FC catalyst on the compatibilization between the PS‐grafted TiO~2~ and PP was discussed based on FC alkylation reaction mechanism. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009