Effects of TPU on the mechanical properties, fracture toughness, morphology, and thermal analysis of 3D-printed ABS-TPU blends by FDM

IF 3.8 4区工程技术 Q2 CHEMISTRY, APPLIED

Journal of Vinyl & Additive Technology Pub Date : 2024-02-20 DOI:10.1002/vnl.22097

Kianoosh Soltanmohammadi, Davood Rahmatabadi, Mohammad Aberoumand, Elyas Soleyman, Ismaeil Ghasemi, Majid Baniassadi, Karen Abrinia, Mahdi Bodaghi, Mostafa Baghani

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引用次数: 0

Abstract

In this paper, blends of ABS-TPU with two different weight percentages of TPU were prepared using fused deposition modeling technology. The effect of adding TPU on the fracture toughness of ABS and mechanical properties was comprehensively studied. Tensile, compression, fracture toughness, and shear tests were conducted on the 3D-printed samples. Thermal and microstructural analyses were performed using dynamic mechanical thermal analysis (DMTA), and scanning electron microscope (SEM). The DMTA results showed that adding TPU decreased the storage modulus and the glass transition temperature of ABS, as well as its peak intensity. The mechanical test results showed that adding TPU decreased the strength but increased the formability and elongation of the samples. Fracture tests showed that the addition of TPU decreased the maximum force needed for a crack to initiate. The force required for crack initiation decreased from 568.4 N for neat ABS to 335.3 N for ABS80 and 123.2 N for ABS60. The ABS60 blend exhibited the highest strength against crack growth, indicating that TPU can change the behavior of ABS from brittle to ductile. Shear test results and SEM images also showed good adhesion strength between the printed samples for all three specimens, indicating their good printability. Adding TPU resulted in a reduction in the size and number of voids and holes between the printed layers.

Highlights

Melt mixing, filament preparation, and 3D printing of ABS-TPU blends.
Investigation of mechanical properties, microstructure, and fracture toughness.
Improved resistance to crack growth and elongation by adding TPU to ABS.
Improving printability and reducing microholes in blends compared with ABS.
Achieving a wide range of mechanical properties for various applications.

Abstract Image

查看原文本刊更多论文

热塑性聚氨酯对 FDM 3D 打印 ABS-TPU 共混物的机械性能、断裂韧性、形态和热分析的影响

本文采用熔融沉积模型技术制备了含有两种不同重量百分比热塑性聚氨酯的 ABS-TPU 共混物。全面研究了添加热塑性聚氨酯对 ABS 断裂韧性和力学性能的影响。对 3D 打印样品进行了拉伸、压缩、断裂韧性和剪切试验。使用动态机械热分析（DMTA）和扫描电子显微镜（SEM）进行了热分析和微观结构分析。DMTA 结果表明，添加 TPU 会降低 ABS 的储存模量和玻璃化转变温度，并降低其峰值强度。机械测试结果表明，添加热塑性聚氨酯降低了样品的强度，但提高了成型性和伸长率。断裂测试表明，添加热塑性聚氨酯降低了裂纹萌发所需的最大力。裂纹萌发所需的力从纯 ABS 的 568.4 牛顿减少到 ABS80 的 335.3 牛顿和 ABS60 的 123.2 牛顿。ABS60 混合物的抗裂纹强度最高，这表明热塑性聚氨酯可将 ABS 的行为从脆性转变为韧性。剪切测试结果和扫描电镜图像还显示，所有三种试样的印刷样品之间都具有良好的粘合强度，这表明它们具有良好的可印刷性。添加热塑性聚氨酯后，打印层之间的空隙和孔洞的大小和数量都有所减少。研究机械性能、微观结构和断裂韧性。通过在 ABS 中添加 TPU，提高抗裂纹生长能力和伸长率。与 ABS 相比，改善混合材料的可打印性并减少微孔。为各种应用实现广泛的机械性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Vinyl & Additive Technology 工程技术-材料科学：纺织

CiteScore

5.40

自引率

14.80%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Vinyl and Additive Technology is a peer-reviewed technical publication for new work in the fields of polymer modifiers and additives, vinyl polymers and selected review papers. Over half of all papers in JVAT are based on technology of additives and modifiers for all classes of polymers: thermoset polymers and both condensation and addition thermoplastics. Papers on vinyl technology include PVC additives.