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Materials 2018, 11(2), 285;

Comparison of Ultem 9085 Used in Fused Deposition Modelling (FDM) with Polytherimide Blends

Dipartimento di Ingegneria Civile e Architettura, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
UdR-Catania Consorzio National Interuniversity Consortium of Materials Science and Technology (INSTM), Viale Andrea Doria 6, 95125 Catania, Italy
Institute for Polymers, Composites and Biomaterials (ICPB), National Research Council (CNR), Via Paolo Gaifami 17, 95125 Catania, Italy
Author to whom correspondence should be addressed.
Received: 22 January 2018 / Revised: 6 February 2018 / Accepted: 10 February 2018 / Published: 12 February 2018
(This article belongs to the Special Issue Polymer Blends and Compatibilization 2018)
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Polyetherimide (PEI) blends modified by either polycarbonate (PC) or polyethylene terephthalate glycol-modified (PETG) were prepared. The latter modifier (PETG) was an industrial grade widely used for fused deposition modelling (FDM) printing. PEI blends were compared to Ultem 9085, which is the standard PEI grade for FDM printing in advanced applications. All the blends were thoroughly characterized in terms of their rheological, morphological, thermomechanical and tensile properties. Ultem 9085 showed improved rheology for processing over standard PEI. PEI/PC blends with 10 wt % of modifier developed here closely matched the viscosity behavior of Ultem 9085. On the other hand, the blends with low PC content (i.e., less than 20 wt %) outperformed Ultem 9085 in terms of thermal and tensile properties. When PETG was added, similar tensile properties to Ultem 9085 were found. The immiscibility for PC contents higher than 20 wt % deteriorated the tensile properties, making it less attractive for applications, although melt viscosity decreased further for increasing PC contents. View Full-Text
Keywords: thermoplastic blends; additive manufacturing; fused deposition modelling; mechanical properties thermoplastic blends; additive manufacturing; fused deposition modelling; mechanical properties

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Cicala, G.; Ognibene, G.; Portuesi, S.; Blanco, I.; Rapisarda, M.; Pergolizzi, E.; Recca, G. Comparison of Ultem 9085 Used in Fused Deposition Modelling (FDM) with Polytherimide Blends. Materials 2018, 11, 285.

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