Scholarlink

<p>This study explores direct ink writing (DIW) based additive manufacturing of a commercially available styrene-ethylene-propylene-styrene (SEPS) block copolymer. To formulate suitable inks used as the feedstock materials for DIW, the interaction of ten distinct solvents with the constituent blocks of the SEPS block copolymer was studied theoretically using Hansen solubility parameter (HSP) analysis, which identified toluene as the most appropriate solvent. The printability of the developed ink was assessed through viscosity measurements, thixotropy analysis and evaluation of shape stability of the extrudate inks. These studies suggested that inks containing 35–40 wt% SEPS exhibited adequate printability and shape stability. The mechanical, physical, morphological properties and defects in the printed samples were also investigated. The printed samples experienced comparatively high shrinkage (~ 26–52%) in thickness direction owing to solvent evaporation. Field emission scanning electron microscopy (FESEM) images revealed good inter- and intra-layer coalescence behaviour. However, pore-like defects were observed in the printed samples and their size and number were found to be strongly dependent on the solvent content in the ink. Samples printed with 35–40 wt% inks demonstrated high elongation at break (~ 900–1000%), tensile strength of 6.1–7.2&#xa0;MPa, and Shore A hardness values of ~ 62–63.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Direct ink writing of styrene-ethylene-propylene-styrene block copolymer: ink formulation, printability and physicomechanical properties

  • 期刊论文

  • 发表日期：

    2026年2月18日

查看全文
  • Kelvin M. Gajera,
  • Arun Kumar,
  • Pulak Mohan Pandey,
  • Shib Shankar Banerjee

摘要

This study explores direct ink writing (DIW) based additive manufacturing of a commercially available styrene-ethylene-propylene-styrene (SEPS) block copolymer. To formulate suitable inks used as the feedstock materials for DIW, the interaction of ten distinct solvents with the constituent blocks of the SEPS block copolymer was studied theoretically using Hansen solubility parameter (HSP) analysis, which identified toluene as the most appropriate solvent. The printability of the developed ink was assessed through viscosity measurements, thixotropy analysis and evaluation of shape stability of the extrudate inks. These studies suggested that inks containing 35–40 wt% SEPS exhibited adequate printability and shape stability. The mechanical, physical, morphological properties and defects in the printed samples were also investigated. The printed samples experienced comparatively high shrinkage (~ 26–52%) in thickness direction owing to solvent evaporation. Field emission scanning electron microscopy (FESEM) images revealed good inter- and intra-layer coalescence behaviour. However, pore-like defects were observed in the printed samples and their size and number were found to be strongly dependent on the solvent content in the ink. Samples printed with 35–40 wt% inks demonstrated high elongation at break (~ 900–1000%), tensile strength of 6.1–7.2 MPa, and Shore A hardness values of ~ 62–63.