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Thermal, dielectric, and mechanical properties of h‐BN‐filled PTFE composites

Title data

Zimmermann-Ptacek, Johanna ; Muggli, Mark ; Wildhack, Stefanie ; Hintzer, Klaus ; Gerdes, Thorsten ; Willert-Porada, Monika ; Moos, Ralf:
Thermal, dielectric, and mechanical properties of h‐BN‐filled PTFE composites.
In: Journal of Applied Polymer Science. Vol. 135 (2018) Issue 44 . - Art.Nr. 46859.
ISSN 1097-4628
DOI: https://doi.org/10.1002/app.46859

Abstract in another language

In order to obtain materials for improved printed circuit boards (PCBs) with high thermal conductivity and low dielectric losses, hexagonal boron nitride (h‐BN) was incorporated into a polytetrafluoroethylene (PTFE) matrix. The filler loading in the composite was varied up to a filler volume content of 50%. Thermal conductivity and coefficient of thermal expansion (CTE) were investigated with respect to filler orientation. Further dielectric and mechanical properties were investigated. The incorporation of h‐BN improved the heat transport significantly, while the loss factor decreased. Fillers with a higher aspect ratio have a greater effect on increasing thermal conductivity. For a filler volume loading of 30%, the in‐plane thermal conductivity was up to 14 times higher than the thermal conductivity of the matrix, while the loss factor decreased slightly. The permittivity increased with the increasing filler volume content, while the CTE also decreased. Though the filler affects the mechanical properties negatively, 40% of the tensile strength could be maintained if a filler volume content of 30% is not exceeded. Such compositions may be used as raw materials for future printed circuit boards.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Materials Processing
Faculties > Faculty of Engineering Science > Ehemalige Professoren > Chair Materials Processing - Univ.-Prof. Dr. Monika Willert-Porada
Faculties > Faculty of Engineering Science > Chair Functional Materials
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 26 Oct 2018 06:53
Last Modified: 14 Mar 2019 09:18
URI: https://eref.uni-bayreuth.de/id/eprint/46149