This work is focused on the influence of moisture content on the processing and mechanical properties of a biodegradable polyester used for applications in injection molding. The pellets of the biodegradable polyester were exposed under different relative humidity conditions at a constant temperature before being compression molded. The compression-molded specimens were again placed under the above conditions before the mechanical testing. With all these samples, it is possible to determine the effect of moisture content on the processing and mechanical properties separately, as well as the combined effect of moisture content on the mechanical properties. The results obtained showed that the amount of absorbed water—both before processing and before mechanical testing— causes an increase in elongation at break and a slight reduction of the elastic modulus and tensile strength. These changes have been associated with possible hydrolytic degradation during the compression molding process and, in particular, with the plasticizing action of the moisture absorbed by the specimens.

Titone V., Correnti A., La Mantia F.P. (2021). Effect of moisture content on the processing and mechanical properties of a biodegradable polyester. POLYMERS, 13(10) [10.3390/polym13101616].

Effect of moisture content on the processing and mechanical properties of a biodegradable polyester

Titone V.
;
La Mantia F. P.
2021-05-01

Abstract

This work is focused on the influence of moisture content on the processing and mechanical properties of a biodegradable polyester used for applications in injection molding. The pellets of the biodegradable polyester were exposed under different relative humidity conditions at a constant temperature before being compression molded. The compression-molded specimens were again placed under the above conditions before the mechanical testing. With all these samples, it is possible to determine the effect of moisture content on the processing and mechanical properties separately, as well as the combined effect of moisture content on the mechanical properties. The results obtained showed that the amount of absorbed water—both before processing and before mechanical testing— causes an increase in elongation at break and a slight reduction of the elastic modulus and tensile strength. These changes have been associated with possible hydrolytic degradation during the compression molding process and, in particular, with the plasticizing action of the moisture absorbed by the specimens.
mag-2021
Titone V., Correnti A., La Mantia F.P. (2021). Effect of moisture content on the processing and mechanical properties of a biodegradable polyester. POLYMERS, 13(10) [10.3390/polym13101616].
File in questo prodotto:
File Dimensione Formato  
polymers-13-01616.pdf

accesso aperto

Tipologia: Versione Editoriale
Dimensione 2.52 MB
Formato Adobe PDF
2.52 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/621706
Citazioni
  • ???jsp.display-item.citation.pmc??? 5
  • Scopus 16
  • ???jsp.display-item.citation.isi??? 14
social impact