Citation: Zhuo Li, Yu-hong Ma, Wan-tai Yang. Polypropylene/Silica Nanocomposites in situ Prepared via Sol-Gel Reactions Using Porous Spherical Poly(propylene-g-(styrene-alt-maleic anhydride)) Granules as Reaction Loci[J]. Chinese Journal of Polymer Science, ;2015, 33(12): 1730-1740. doi: 10.1007/s10118-015-1716-x shu

Polypropylene/Silica Nanocomposites in situ Prepared via Sol-Gel Reactions Using Porous Spherical Poly(propylene-g-(styrene-alt-maleic anhydride)) Granules as Reaction Loci

Zhuo Li ^1,2,3 ,
Yu-hong Ma ⁴ ,
Wan-tai Yang ^1,2,3,,

1.
1. The State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, Beijing 100029, China
2.
2. Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China
3.
4.
Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China

Corresponding author: Wan-tai Yang,
Received Date: 26 May 2015
Revised Date: 16 June 2015

Using the porous polypropylene(PP) granules consisting of submicroparticles prepared by the reactor granular technology(RGT), a facile process was developed to synthesize in situ polypropylene/silica nanocomposites where styrene-alt-maleic anhydride copolymers(PSM) were firstly grafted onto both the outer- and the inner-pore surfaces of PP granules via solid-phase grafting polymerization, and then a sol-gel reaction was conducted inside these micro-pores with the carboxyl acid derived from maleic anhydride as catalyst. TEM micrographs demonstrated that the silica nanoparticles obtained by this strategy had a size around 10-20 nm in diameter and uniformly dispersed in the PSM-based nanocomposites. More importantly, the silica nanoparticles could significantly reduce the size of PP spherulites. Consequently, the PP/silica nanocomposites with high transparency and good mechanical performance were achieved.
- Nanocomposites,
- Solid-state polymerization,
- Silica
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