SHAPE RECOVERY PROPERTIES OF PET-BASED 3D PRINTED SAMPLES

Vasile ERMOLAI, Alexandru SOVER, Gheorghe NAGÎȚ, Alexandru Ionuț IRIMIA

Abstract


Multimaterial fused filament fabrication can be used for producing shape memory systems. This way, the shape recovery of polyethylene terephthalate-based (PET) samples with deformation at room temperature was studied based on tensile testing and heat treatment in two deformation-recovery cycles. Two configurations were tested, one made of PET and the second made of PET and polyamide (PA). Adding PA improves the samples' shape recovery in the first deformation-recovery cycle. In the second, a major improvement in the shape recovery of pure PET was recorded. This result was assigned to the retraction effect of the PET polymeric chains due to increased elongation. Both tested configurations showed a good shape recovery effect, which can be used to repair deformed parts.


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References


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