Dispersibility of nanoparticels with different surface functionalization at various processing parameters in the internal mixer

Peltner D, Werner S, Schubert DW (2023)

Publication Language: English

Publication Type: Conference contribution, Abstract of a poster

Publication year: 2023

Event location: Kopenhagen DK

Abstract

The present study investigates the dispers-
ibility of silica nanoparticles with different
types of hydrophobic surface functionaliza-
tion in polypropylene. Therefore, the particles
and the PP were compounded in an internal
mixer at various processing parameters. The
obtained compounds were hot pressed into
square shaped plugs and biaxially stretched
into films. The latter was done to increase the
size of the agglomerates, so they could be de-
tected by light microscopy. The agglomerates
were analysed using a contrast-based parti-
cle detection and a 12-spot pattern over the
stretched film. Parameters such as number,
size, and area fraction of agglomerates were
used to characterize the dispersion and corre-
lated with rotation speed and mixing time.
A reduction of number, size and agglomerate
area fraction with higher rotation speed and
mixing time was found. The latter could be
described with an exponential decay function
with three adjustable parameters. These pa-
rameters correlated with the hydrophobicity
of the surface functionalization indicating a
faster reduction to lower levels with increas-
ing hydrophobicity. The area fraction of
agglomerates was identified as the most
meaningful dispersion parameter as it com-
bines information about size and number of
the particles. This study shows a new method
of analysing the dispersion of silica nano-
particles in PP and that their dispersibility in
dependence of the surface functionalization
can be characterized by the mixing kinetics of
an internal mixer.

Authors with CRIS profile

Siegfried Werner Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe) Dirk Schubert Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe)

How to cite

APA:

Peltner, D., Werner, S., & Schubert, D.W. (2023, May). Dispersibility of nanoparticels with different surface functionalization at various processing parameters in the internal mixer. Poster presentation at Nordic Polymer days 2023, Kopenhagen, DK.

MLA:

Peltner, David, Siegfried Werner, and Dirk W. Schubert. "Dispersibility of nanoparticels with different surface functionalization at various processing parameters in the internal mixer." Presented at Nordic Polymer days 2023, Kopenhagen 2023.

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