Effects of 3-APTMS-Modified Nano-SiO₂ on the Mechanical Properties and Crystallization Behavior of Polyamide-6

Abstract:

Nanocomposites of polyamide-6 with nanoSiO₂ surface modified by 3-aminopropyltrimethoxysilane (3-APTMS) were prepared by melt blending in torque rheometer. Chemical modification of nanoparticles surface with 3-APTMS were observed by FTIR. Prior to nanocomposites processing, neat polyamide-6 (PA-6) was processed in a torque rheometer with varying processing parameters: polymer residence time in the chamber, rollers rotational speed, and polymer filling volume in the chamber. Two levels for each parameter were fixed. The influence of these parameters on degradation of PA-6 was determined by dilute solution viscosity and capillary rheometry. Results indicate that the best condition was achieved with the higher polymer residence time in the chamber, the higher rollers rotational speed, and the higher polymer filling volume in the chamber. With this information, PA-6 pellets were mixed with nanosilica particles unmodified and surface-capped by 3-APTMS via melt blending in torque rheometer, obtaining PA-6 composites with 1 wt.% of nanofillers. Mechanical and thermal properties of nanocomposites were evaluated by means of tensile test and differential scanning calorimetry (DSC).

• Periodical: Materials Science Forum (Volume 869)
• Pages: 314-319
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.869.314
• Online since: August 2016
• Authors: Breno D. Queiroz*, Vitor L.P. Janzantti, José Donato Ambrósio
• Keywords: 3-APTMS, Nanocomposites, Nano-SiO₂, PA-6, Torque Rheometer

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