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Nondegradative additive manufacturing of medical grade copolyesters of high molecular weight and with varied elastic response
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.ORCID iD: 0000-0001-7135-9158
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
Univ Bergen, Fac Med, Dept Clin Dent, Bergen, Norway..
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2020 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 137, no 15, article id 48550Article in journal (Refereed) Published
Abstract [en]

Although additive manufacturing through melt extrusion has become increasingly popular as a route to design scaffolds with complex geometries the technique if often limited by the reduction in molecular weight and the viscoelastic response when degradable aliphatic polyesters of high molecular weight are used. Here we use a melt extruder and fused filament fabrication printer to produce a reliable nondegradative route for scaffold fabrication of medical grade copolymers of L-lactide, poly(epsilon-caprolactone-co-L-lactide), and poly(L-lactide-co-trimethylene carbonate). We show that degradation is avoided using filament extrusion and fused filament fabrication if the process parameters are deliberately chosen based upon the rheological behavior, mechanical properties, and polymer composition. Structural, mechanical, and thermal properties were assessed throughout the process to obtain comprehension of the relationship between the rheological properties and the behavior of the medical grade copolymers in the extruder and printer. Scaffolds with a controlled architecture were achieved using high-molecular-weight polyesters exhibiting a large range in the elastic response causing negligible degradation of the polymers.

Place, publisher, year, edition, pages
WILEY , 2020. Vol. 137, no 15, article id 48550
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Chemical Sciences
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URN: urn:nbn:se:kth:diva-267140DOI: 10.1002/app.48550ISI: 000508022900024Scopus ID: 2-s2.0-85073154893OAI: oai:DiVA.org:kth-267140DiVA, id: diva2:1393484
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QC 20200217

Available from: 2020-02-17 Created: 2020-02-17 Last updated: 2020-02-17Bibliographically approved

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Ahlinder, AstridFuoco, TizianaMorales-Lopez, AlvaroFinne Wistrand, Anna

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