1. ABOUT THE DATASET
--------------------

Title:	Data associated with Stereolithography 3D printing of PTFE-Filled Photopolymer Composites for THz Quasi Optical Applications

Creator(s): Luke Phillips [1], Harry J. Godden [2], John Kendrick [3], Nathan R. Fox [2], Alexander Valavanis [2], Andrew D. Burnett [3], Robert Kay [1], Ehab Saleh [1,4].


Organisation(s): 1. School of Mechanical Engineering, The University of Leeds, Leeds LS2 9JT, U.K.
2. School of Electronic and Electrical Engineering, The University of Leeds, Leeds LS2 9JT, U.K.
3. School of Chemistry, The University of Leeds, Leeds, LS2 9JT, U.K.
4. College of Engineering and Technology, University of Doha for Science and Technology, Doha, Qatar.

Rights-holder(s):Unless otherwise stated, Copyright 2025 University of Leeds

Publication Year: 2025

Description: A data set containing the modelled and experimental THz-TDS results of AM-produced PTFE-filled photopolymer composites and compressed PTFE powder pellets.

Cite as: Luke Phillips, Harry J. Godden, John Kendrick, Nathan R. Fox, Alexander Valavanis, Andrew D. Burnett, Robert Kay, Ehab Saleh (2025): Data associated with Stereolithography 3D printing of PTFE-Filled Photopolymer Composites for THz Quasi Optical Applications. [Dataset].

Related publication: Luke Phillips, Harry J. Godden, John Kendrick, Nathan R. Fox, Alexander Valavanis, Andrew D. Burnett, Robert Kay, Ehab Saleh, Stereolithography 3D printing of PTFE-Filled Photopolymer Composites for THz Quasi Optical Applications, Journal of Additive Manufacturing, 2025. (In preparation).

2. TERMS OF USE
---------------

Copyright 2025 University of Leeds. Unless otherwise stated, this dataset is licensed under a Creative Commons Attribution 4.0 International Licence: https://creativecommons.org/licenses/by/4.0/.]


3. PROJECT AND FUNDING INFORMATION
----------------------------------

The authors gratefully acknowledge financial support from the following sources:
UK Research and Innovation (Future Leader Fellowship MR/S016969/1 and MR/Y011775/1)


4. CONTENTS
-----------
File listing

Experimental Results – PTFE-Filled Photopolymers.zip
	-Exposure Doses Required for Photopolymer and PTFE Composites.xls
	-Fourier Transformed THz-TDS Scans.xls
	-THz-TDS Time Domain Scans

Experimental Results – VW and Pressed PTFE Pellets.zip
	-Pressed Pellet Sample Thickness.xls
	-THz-TDS Fourier Transformed Data
	-THz-TDS Time Domain Scans

Modelled Optical Properties – Maxwell Garnett EMA
	-Modelled Absorption Coefficient of PTFE Composites (cm^-1)
	-Modelled Refractive Index of PTFE Composites

5. METHODS
----------

PTFE-filled photopolymer composites were formulated and 3D printed using a stereolithography (SLA) printer. The samples with varying PTFE weight ratios were characterised using a broadband terahertz time-domain spectroscopy (THz-TDS) system to examine their optical properties, specifically absorption coefficient and refractive index.
Additionally, PTFE powder was pressed into pellets and characterised using the same THz-TDS setup to facilitate comparisons with the 3D printed composites.
The composites optical properties were also modelled using the Maxwell Garnett effective medium approximation (EMA) for comparison with experimental data.