Poly(ethylene terephthalate) glycol/carbon black composites for 4D printing

• DOI: 10.1016/j.matchemphys.2024.129737
• Publication Date: 2024-07-17T20:55:49Z
• Authors: Davood Rahmatabadi; Abbas Bayati; Mahdi Khajepour; Kiandokht Mirasadi; Ismaeil Ghasemi; Majid Baniassadi; Karen Abrinia; Mahdi Bodaghi; Mostafa Baghani
• Keywords: Fused Deposition Modeling

This research introduces PETG-CB (poly(ethylene terephthalate) glycol modified with carbon black) composites, a new class of shape memory polymers 4D printed using the Fused Deposition Modeling (FDM) method. Nanocomposites varying concentrations CB (0.5 %, 1 and 3 % by weight) are developed to enhance functional performance PETG in printing applications. Comprehensive characterization at micro- macro-scale, including dynamic thermal mechanical analysis (DMTA), scanning electron microscopy (SEM), testing, is employed assess viscoelastic behavior, microstructural integrity, strength under stimulation. Experimental results reveal that addition significantly alters glass transition temperature improves properties, composite demonstrating optimal tensile enhanced effects. SEM confirms uniform distribution particles, contributing improved properties printability nanocomposites. The tests show excellent recovery rates above 97 faster observed composites higher content. These findings highlight potential applications requiring rapid response high performance, making them promising materials for future advancements technology.