Wetting behavior of polymer melts on coated and uncoated tool steel surfaces

Gernot  Zitzenbacher; Zefeng Huang; Manuel Längauer; Christian Forsich; Clemens Holzer

doi:10.1002/APP.43469

Wetting behavior of polymer melts on coated and uncoated tool steel surfaces

Gernot Zitzenbacher, Zefeng Huang, Manuel Längauer, Christian Forsich, Clemens Holzer

Chair of Polymer Processing (350)

University of Applied Sciences Upper Austria

Research output: Contribution to journal › Article › Research › peer-review

11 Citations (Scopus)

Abstract

The wettability of steel and coatings used for tools and screws in polymer processing is often determined at room temperature.
However, it has to be taken into account that polymeric materials are processed at higher temperatures. Contact angle measurements
of melted PP, HDPE, PMMA, and PA 6.6 on steel and on TiN, TiAlN, CrN, DLC, and PTFE were performed in this work to
investigate the wetting behavior under closer-to-processing conditions. The contact angle is dependent on time and the ambient
atmosphere. Oxidation and degradation of the polymer melts influence wetting significantly. TiN, TiAlN, CrN, and DLC exhibit a
rather good wettability, whereas the highest contact angle of the polymer melts was observed with PTFE. Higher roughnesses of the
surfaces lead to an increase in the contact angle. It was also shown that a higher temperature causes a better wetting of the solid
surfaces. VC 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43469.

Original language	English
Article number	43469
Number of pages	10
Journal	Journal of Applied Polymer Science
Volume	133.2016
Issue number	21
DOIs	https://doi.org/10.1002/APP.43469
Publication status	Published - 16 Feb 2016

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10.1002/APP.43469

Cite this

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title = "Wetting behavior of polymer melts on coated and uncoated tool steel surfaces",

abstract = "The wettability of steel and coatings used for tools and screws in polymer processing is often determined at room temperature.However, it has to be taken into account that polymeric materials are processed at higher temperatures. Contact angle measurementsof melted PP, HDPE, PMMA, and PA 6.6 on steel and on TiN, TiAlN, CrN, DLC, and PTFE were performed in this work toinvestigate the wetting behavior under closer-to-processing conditions. The contact angle is dependent on time and the ambientatmosphere. Oxidation and degradation of the polymer melts influence wetting significantly. TiN, TiAlN, CrN, and DLC exhibit arather good wettability, whereas the highest contact angle of the polymer melts was observed with PTFE. Higher roughnesses of thesurfaces lead to an increase in the contact angle. It was also shown that a higher temperature causes a better wetting of the solidsurfaces. VC 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43469.",

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T1 - Wetting behavior of polymer melts on coated and uncoated tool steel surfaces

AU - Zitzenbacher, Gernot

AU - Huang, Zefeng

AU - Längauer, Manuel

AU - Forsich, Christian

AU - Holzer, Clemens

PY - 2016/2/16

Y1 - 2016/2/16

N2 - The wettability of steel and coatings used for tools and screws in polymer processing is often determined at room temperature.However, it has to be taken into account that polymeric materials are processed at higher temperatures. Contact angle measurementsof melted PP, HDPE, PMMA, and PA 6.6 on steel and on TiN, TiAlN, CrN, DLC, and PTFE were performed in this work toinvestigate the wetting behavior under closer-to-processing conditions. The contact angle is dependent on time and the ambientatmosphere. Oxidation and degradation of the polymer melts influence wetting significantly. TiN, TiAlN, CrN, and DLC exhibit arather good wettability, whereas the highest contact angle of the polymer melts was observed with PTFE. Higher roughnesses of thesurfaces lead to an increase in the contact angle. It was also shown that a higher temperature causes a better wetting of the solidsurfaces. VC 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43469.

AB - The wettability of steel and coatings used for tools and screws in polymer processing is often determined at room temperature.However, it has to be taken into account that polymeric materials are processed at higher temperatures. Contact angle measurementsof melted PP, HDPE, PMMA, and PA 6.6 on steel and on TiN, TiAlN, CrN, DLC, and PTFE were performed in this work toinvestigate the wetting behavior under closer-to-processing conditions. The contact angle is dependent on time and the ambientatmosphere. Oxidation and degradation of the polymer melts influence wetting significantly. TiN, TiAlN, CrN, and DLC exhibit arather good wettability, whereas the highest contact angle of the polymer melts was observed with PTFE. Higher roughnesses of thesurfaces lead to an increase in the contact angle. It was also shown that a higher temperature causes a better wetting of the solidsurfaces. VC 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43469.

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