开发3D打印形状记忆聚合物混合物的弹性参数
Truman J Cavender-Word1,2, David A Roberson1,2
1Polymer Extrusion Lab, The University of Texas at El Paso, El Paso, TX 79968, USA.
Materials (Basel, Switzerland)
|September 9, 2023
概括
一个新的弹性参数量化了形状记忆聚合物 (SMP) 在损坏后的强度保留. /TPU混合物表现出极好的弹性,而ABS/SEBS表现出良好的弹性,而/SEBS表现出不良的弹性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 机械工程 机械工程
背景情况:
- 形状记忆聚合物 (SMP) 提供了自我修复和减少浪费的潜力.
- 评估损坏后的材料弹性对于实际应用至关重要.
- 增材制造 (AM) 为SMP制造提供了新的途径.
研究的目的:
- 建立一个弹性参数来量化SMP在损坏恢复后的抗拉强度保留.
- 描述三种不同的SMP混合物的弹性,这些混合物是通过化丝制造 (FFF) 和注塑 (IM) 制造而制造的.
- 评估变形回收对这些SMP混合物的机械性能的影响.
主要方法:
- 三种50/50重量%的SMP混合物的特性:PLA/SEBS-g-MA,ABS/SEBS-g-MA,以及PLA/TPU.
- 使用化丝制造 (FFF) 和注塑 (IM) 制造样本的制造.
- 拉力测试用于评估拉力强度与变形恢复百分比的变化.
主要成果:
- 聚烯/TPU混合物表现出极好的弹性,注射成型样品在变形恢复后显示强度增加.
- 该ABS/SEBS混合物表现出良好的弹性,不管变形恢复如何,保持一致的强度.
- PLA/SEBS混合物表现出不良的弹性,随着初始变形的增加,拉力强度下降.
结论:
- 开发的弹性参数有效地评估了损坏后的SMP性能.
- 制造方法影响某些SMP混合物的弹性,特别是PLA/TPU.
- 增强SMP的弹性可以通过提高材料的寿命和可修复性来减轻塑料废物.
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