6533b82ffe1ef96bd1294890
RESEARCH PRODUCT
The use of the indentation test for studying the solidification behaviour of different semicrystalline polymers during injection moulding
Stefano PiccaroloWouter GabriëlseVincenzo La Carrubbasubject
chemistry.chemical_classificationWork (thermodynamics)Materials sciencePolymers and PlasticsGeneral Chemical EngineeringOrganic ChemistryMolding (process)InjectorPolymermedicine.disease_causelaw.inventionCrystallinitychemistrylawTacticityMoldIndentationMaterials ChemistrymedicineComposite materialdescription
Summary: An in-line method for monitoring the solid-ificationprocess during injection molding of semicrystallinepolymers (demonstrated previously in J. Appl. Polym. Sci.2003, 89, 3713) is based on a simple device, where anadditional ejector pin is pushed on the injection molded partatdifferenttimesduringthesolidificationphase.The‘inden-tation depth profile’, i.e., residual deformation as a functionoftime,wasobtainedandallowedtodeterminetheevolutionof the solidification front in the mold as a function of thecooling time. The present work shows the reliability andthe powerfulness of the aforementioned method for a largevariety of different semicrystalline polymers (PET, PBT,polyamide-6 PA6, isotactic poly(propylene) iPP) character-ized also by different molecular weight and/or nucleatingagents. The results show that the indentation test may beconsidered as a ‘predictive’ tool to qualitatively and quanti-tatively compare the solidification process of different poly-mers and polymer grades during injection molding.Comparison of the solid front propagation during injectionmolding of different materials.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-11-04 |