Modification of Nanosilica Particles and Preparation of Polybutadiene/Silica Nanocomposites by In Situ Anionic Polymerization

Abstract

In this paper silane coupling agents A151, A171, A174 and A187 were used to modify the surface of nanosilica (SiO 2 ) and polybutadiene (PB)/SiO 2 nanocomposites (NC) had been prepared by in situ anionic polymerization. The morphology and chemical constitution of NC were characterized by Transmission electron microscopy (TEM) and Fourier-transform infrared spectroscopy (FTIR); Thermogravimetric analysis (TGA) was used to investigate the thermal properties of NC; the molecular weight and molecular weight distribution of NC were characterized by gel permeation chromatography (GPC). The effect of different SiO 2 and silane coupling agents on the molecular weight and distribution of PB, microstructure and properties were studied. The results showed that the hydrophobicity of SiO 2 was increased after the surface modification by silane coupling agents and can disperse in PB matrix uniformly. The thermal stability of NC also increased.

Surface modification of nano-silica with amides and imides for use in polyester nanocomposites

“…The complementary effect between the polymer matrix and inorganic nanoparticles has been utilized for a long time in the development of new materials. [1][2][3][4][5][6][7][8][9][10][11][12] The general expectation is that the incorporation of these inorganic materials can provide improved rigidity, mechanical and ame retardant properties and thermal stability of the polymer-inorganic nanocomposites (PINCs) over neat or traditionally lled polymers. Typically, such property enhancements originate from the nanometerscale dispersion of these highly anisotropic inorganic llers within the polymer matrix.…”