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RESEARCH PRODUCT
Effect of Moisture Content on the Processing and Mechanical Properties of a Biodegradable Polyester
Vincenzo TitoneAntonio CorrentiFrancesco Paolo La Mantiasubject
Materials sciencePolymers and PlasticsPelletsOrganic chemistryCompression molding02 engineering and technologyMolding (process)010501 environmental sciencesmechanical properties01 natural sciencesArticleQD241-441Ultimate tensile strengthRelative humidityComposite materialElastic modulusWater content0105 earth and related environmental sciencesmoisture contentMoistureGeneral Chemistry021001 nanoscience & nanotechnologybiodegradable polymersrheologyprocessing0210 nano-technologydescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-05-17 | Polymers |