Rheological and Thermal Analysis of PDMS-PC Block Copolymers for Improved FDM 3D Printing Performance
발표자
신지윤 (부산대학교)
연구책임자
현규 (부산대학교)
초록
내용
Polycarbonate (PC) is extensively employed in fused deposition modeling (FDM) due to its excellent mechanical properties; however, poor interlayer adhesion and significant mechanical anisotropy remain persistent challenges. This study investigates PDMS-PC block copolymers, in which polydimethylsiloxane (PDMS)—a polymer possessing a low glass transition temperature—is incorporated into PC to enhance printing performance. Samples with varying PDMS contents (6%, 9%, and 20%) were evaluated alongside neat PC. Rheological properties were characterized through small amplitude oscillatory shear (SAOS), steady shear, high-strain time sweep, and elongational viscosity (EVF) tests to explore structural behavior under conditions relevant to FDM processing. Morphological features of the materials were preliminarily examined to establish structure-property correlations. Additionally, thermal properties were characterized using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) to determine suitable printing parameters.