Preparation and characterization of epoxy nanocomposites by using PEO-grafted silica particles as modifier |
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Authors: | Shao-Rong Lu Chun Wei Jin-Hong Yu Xiao-Wang Yang Yu-Mei Jiang |
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Affiliation: | (1) Key Laboratory of New Processing Technology for Nonferrous Metal Materials, Ministry of Education, Guilin, 541004, P.R. China |
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Abstract: | EP/SiO2 nanocomposites, which contained PEO flexible chain, have been prepared via epoxy resin and PEO-grafted silica particles.
The PEO-silica particles were obtained by endcapping PEO-1000 with toluene 2,4-diisocyanate (TDI), followed by a reaction
with silica sols. The chemical structure of the products was confirmed by IR measurements, and the mechanical properties of
composites such as impact strength, flexural strength, dynamic mechanical thermal properties were investigated. The results
showed that the addition of the PEO-grafted silica particles to the epoxy/DDS curing system, the impact strength is 2 times
higher than that of the neat epoxy. While the storage modulus and the glass transition temperature are a little changed. The
morphological structure of impact fracture surface and the surface of the hybrid materials were observed by scanning electron
microscope (SEM) and atomic force microscopy (AFM), respectively. |
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