Attritor-milling of poly(amide imide) suspensions (Open Access)--颗粒学报PARTICUOLOGY

Wolff, M. F. H., Antonyuk, S., Heinrich, S., & Schneider, G. A. (2014). Attritor-milling of poly(amide imide) suspensions. Particuology, 17, 92–96. https://doi.org/10.1016/j.partic.2013.11.005

Attritor-milling of poly(amide imide) suspensions (Open Access)

M.F.H. Wolff ^a *, S. Antonyuk ^a, S. Heinrich ^a, G.A. Schneider ^b

a Hamburg University of Technology, Institute of Solids Process Engineering and Particle Technology, Denickestr. 15, 21073 Hamburg, Germany
b Hamburg University of Technology, Institute of Advanced Ceramics, Denickestr. 15, 21073 Hamburg, Germany

10.1016/j.partic.2013.11.005

Volume 17, December 2014, Pages 92-96

Received 4 September 2013, Revised 28 October 2013, Accepted 23 November 2013, Available online 22 January 2014.

E-mail: michael.wolff@tuhh.de

Highlights

• Poly(amide imide) powder was wet-milled in an attritor at various milling conditions.

• Polymer powder median diameter was reduced from 21 to 3 μm after 7-h milling.

• After milling the as-received suspension was stable.

Abstract

The milling behavior of poly(amide imide), which serves as a prototypical hydrophilic high-performance polymer with a high glass transition temperature, was investigated. Various milling conditions (milling times up to 7 h, stirrer tip speeds of 3.4–4.9 m/s, and mass concentrations of 5–20%) were tested, and particle sizes as low as d_50,3 ∼ 3 μm were obtained. The milling was performed at 11 °C in an attritor. Differential scanning calorimetry and thermogravimetric analysis were performed before and after milling to investigate the effect of milling on the glass transition temperature and on the decomposition behavior of the polymer. The suspension obtained after milling was observed to be stable without the addition of stabilizers or the adjustment of the pH value, and no negative effect of milling on the polymer properties was observed. The attritor technique proved to be an adequate and efficient milling tool for the production of micrometer-sized high-performance polymer suspensions.

Graphical abstract

Keywords

Attritor; Polymer; Grinding; Suspension

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