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The effect of filler surface modification and processing conditions on distribution behaviour of silica nanofillers in polyesters

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Abstract

Dispersion and distribution of nanosized precipitated amorphous silica particles in poly(ethylene terephthalate) PET and poly(butylene terephthalate) PBT matrices have been studied. The effect of silane coupling agent as well as processing conditions has been analysed on the basis of microscopic analysis of sample morphology. N-2-(aminoethyl)-3-aminopropyltrimethoxysilane (A-1120) has been used as a silica surface modifier. The effect of the extrusion process performance with a single and a twin screw extruder has been tested. It has been found that the processing conditions are more important factors determining fine dispersion and homogenous distributions of filler particles in the matrix than the filler surface modification. The results obtained have revealed that single screw extrusion is preferred only for processing the composites comprising the silica modified with aminosilane, while the application of twin screw extrusion leads to homogenous dispersion and fully deagglomeration of filler particles without silane treatment. It has been established that when the concentration of silica filler increased from 3 up to 7% by weight, the secondary process of particle aggregation occurs.

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Acknowledgement

This work was financially supported by the Polish Ministry of Education and Science research grant no T08E 030 25.

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Authors and Affiliations

  1. Institute of Materials Technology, Poznan University of Technology, Piotrowo 3 Street, 60-965, Poznan, Poland

    Karol Bula

  2. Institute of Chemical Technology and Engineering, Poznan University of Technology, M. Sklodowskiej-Curie 2 Sq., 60-965, Poznan, Poland

    Teofil Jesionowski & Andrzej Krysztafkiewicz

  3. Institute of Polymer Science, Technical University of Szczecin, 10 Pulaskiego Street, 70-332, Szczecin, Poland

    Jolanta Janik

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  1. Karol Bula
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  2. Teofil Jesionowski
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  3. Andrzej Krysztafkiewicz
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  4. Jolanta Janik
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Correspondence to Karol Bula.

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Bula, K., Jesionowski, T., Krysztafkiewicz, A. et al. The effect of filler surface modification and processing conditions on distribution behaviour of silica nanofillers in polyesters. Colloid Polym Sci 285, 1267–1273 (2007). https://doi.org/10.1007/s00396-007-1687-8

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  • DOI: https://doi.org/10.1007/s00396-007-1687-8

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