Publication detail

Influence of FFF Process Conditions on the Thermal, Mechanical, and Rheological Properties of Poly(hydroxybutyrate-co-hydroxy Hexanoate)

CAPUTO, M. FERNÁNDEZ, M. AGUIRRESAROBE, R. KOVALČÍK, A. SARDON, H. CANDAL, M. MÜLLER, A.

Original Title

Influence of FFF Process Conditions on the Thermal, Mechanical, and Rheological Properties of Poly(hydroxybutyrate-co-hydroxy Hexanoate)

Type

journal article in Web of Science

Language

English

Original Abstract

Polyhydroxyalkanoates are natural polyesters synthesized by microorganisms and bacteria. Due to their properties, they have been proposed as substitutes for petroleum derivatives. This work studies how the printing conditions employed in fuse filament fabrication (FFF) affect the properties of poly(hydroxybutyrate-co-hydroxy hexanoate) or PHBH. Firstly, rheological results predicted the printability of PHBH, which was successfully realized. Unlike what usually happens in FFF manufacturing or several semi-crystalline polymers, it was observed that the crystallization of PHBH occurs isothermally after deposition on the bed and not during the non-isothermal cooling stage, according to calorimetric measurements. A computational simulation of the temperature profile during the printing process was conducted to confirm this behavior, and the results support this hypothesis. Through the analysis of mechanical properties, it was shown that the nozzle and bed temperature increase improved the mechanical properties, reducing the void formation and improving interlayer adhesion, as shown by SEM. Intermediate printing velocities produced the best mechanical properties.

Keywords

additive manufacturing; poly(hydroxybutyrate-co-hydoxyhexanoate); biodegradable; mechanical properties; crystallinity

Authors

CAPUTO, M.; FERNÁNDEZ, M.; AGUIRRESAROBE, R.; KOVALČÍK, A.; SARDON, H.; CANDAL, M.; MÜLLER, A.

Released

7. 4. 2023

Publisher

MDPI

Location

BASEL

ISBN

2073-4360

Periodical

Polymers

Year of study

15

Number

8

State

Swiss Confederation

Pages from

1

Pages to

25

Pages count

25

URL

https://www.mdpi.com/2073-4360/15/8/1817

Full text in the Digital Library

http://hdl.handle.net/11012/244324

BibTex

@article{BUT183686,
  author="Maria Rosaria {Caputo} and Mercedes {Fernández} and Robert {Aguirresarobe} and Adriána {Kovalčík} and Haritz {Sardon} and María Virginia {Candal} and Alejandro J. {Müller}",
  title="Influence of FFF Process Conditions on the Thermal, Mechanical, and Rheological Properties of Poly(hydroxybutyrate-co-hydroxy Hexanoate)",
  journal="Polymers",
  year="2023",
  volume="15",
  number="8",
  pages="1--25",
  doi="10.3390/polym15081817",
  issn="2073-4360",
  url="https://www.mdpi.com/2073-4360/15/8/1817"
}