Scholarlink

<p>In this study, polyethylene terephthalate glycol (PETG) was used for the first time as a dispersed phase to enhance the mechanical properties and printability of high-performance polypropylene (PP). In addition, PETG contributes 4D printing capability to the PP blend due to its intrinsic shape memory effect (SME). PP blends containing three different PETG weight percentages were prepared through melt mixing and 3D printed using material extrusion. The thermal, mechanical, morphological, printability, and shape memory properties of the resulting blends were comprehensively investigated through dynamic mechanical thermal analysis (DMTA), tensile testing, scanning electron microscopy (SEM), and shape memory cycling under 180° bending. DMTA results and SEM micrographs confirmed that the blends exhibit an immiscible, two-phase structure. With increasing PETG content, the morphology evolves from a matrix-droplet structure to a combination of matrix-droplet, co-continuous, and sea-island morphologies. The tensile strength of the blends ranged from 18.21 to 22.27&#xa0;MPa, corresponding to the highest and lowest PETG contents, respectively. Printability was significantly influenced by PETG content and blend morphology, with the 30 wt.% PETG blend showing the fewest micropores and the strongest interlayer bonding. All three PP–PETG blends exhibited a shape memory effect, with the 15 wt.% PETG blend achieving over 55% shape recovery. The highest shape recovery ratio, approximately 73%, was observed in the blend with the highest PETG content, highlighting PETG’s role in imparting shape memory functionality.</p> Graphical abstract <p></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

3D-printed polypropylene–polyethylene terephthalate glycol blends: the effect of polyethylene terephthalate glycol on the mechanical, thermal, microstructure, and shape memory effect

  • 期刊论文

  • 发表日期：

    2025年8月25日

查看全文
  • Meijun Hu,
  • Xingyao Yan,
  • Yuanyuan Ding,
  • Xueguang Cuia,
  • Xianxin Bian

摘要

In this study, polyethylene terephthalate glycol (PETG) was used for the first time as a dispersed phase to enhance the mechanical properties and printability of high-performance polypropylene (PP). In addition, PETG contributes 4D printing capability to the PP blend due to its intrinsic shape memory effect (SME). PP blends containing three different PETG weight percentages were prepared through melt mixing and 3D printed using material extrusion. The thermal, mechanical, morphological, printability, and shape memory properties of the resulting blends were comprehensively investigated through dynamic mechanical thermal analysis (DMTA), tensile testing, scanning electron microscopy (SEM), and shape memory cycling under 180° bending. DMTA results and SEM micrographs confirmed that the blends exhibit an immiscible, two-phase structure. With increasing PETG content, the morphology evolves from a matrix-droplet structure to a combination of matrix-droplet, co-continuous, and sea-island morphologies. The tensile strength of the blends ranged from 18.21 to 22.27 MPa, corresponding to the highest and lowest PETG contents, respectively. Printability was significantly influenced by PETG content and blend morphology, with the 30 wt.% PETG blend showing the fewest micropores and the strongest interlayer bonding. All three PP–PETG blends exhibited a shape memory effect, with the 15 wt.% PETG blend achieving over 55% shape recovery. The highest shape recovery ratio, approximately 73%, was observed in the blend with the highest PETG content, highlighting PETG’s role in imparting shape memory functionality.

Graphical abstract