Optical and Mechanical Properties of Highly Transparent Glass-Flake Composites

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Scharfe, Benedikt ; Lehmann, Sebastian ; Gerdes, Thorsten ; Brüggemann, Dieter:
Optical and Mechanical Properties of Highly Transparent Glass-Flake Composites.
In: Journal of Composites Science. Bd. 3 (2019) Heft 4 . - 101.
ISSN 2504-477X
DOI: https://doi.org/10.3390/jcs3040101

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Abstract

In this paper, the dynamic mechanic and optical properties of composites made of Polyvinyl Butyral (PVB) and Micro Glass Flakes (MGF) with matching refractive indices (RIs) are investigated. The composite is produced by a slurry-based process using additional blade casting and lamination. It can be shown that a high degree of ordering of the MGF in the polymer matrix can be achieved with this method. This ordering, combined with the platelet-like structure of the MGF, leads to very efficient strengthening of the PVB with increasing content of the MGF. By carefully adjusting the RIs of the polymer, it is shown that haze is reduced to below 2, which has not been achieved with irregular fillers or glass fibers.