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相关概念视频

Classification and Mechanical Properties of Synthetic Polymers01:28

Classification and Mechanical Properties of Synthetic Polymers

Synthetic polymers are classified as elastomers, fibers, or plastics based on their crystallinity. Crystallinity, the degree of long-range order in the solid state, influences the mechanical properties (stretching or contracting) of elastomers. Elastomers are flexible polymers that can expand or contract easily upon the application of an external force. They have numerous crosslinks that pull them back into their original shape when stress is removed. Silicones, for instance, are highly elastic...

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在基于挤出的增材制造中,多功能PVDF的可打印度指标和应变率灵敏度.

Nectarios Vidakis1, Nektarios K Nasikas2, Nikolaos Michailidis3,4

  • 1Department of Mechanical Engineering, Hellenic Mediterranean University, 71410 Heraklion, Greece.

Polymers
|November 27, 2025
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概括

这项研究探讨了延展率如何影响3D打印的聚乙烯化物 (PVDF) 组件. 更高的加载速度可以增强PVDF.

关键词:
热评价的热评价方法延长速度的延长速度聚乙烯化物 (PVDF) 的使用风湿学评价 风湿学评价变种速率的变种速度是多少三维 (3D) 打印方式

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科学领域:

  • 材料科学 材料科学 材料科学
  • 添加剂制造 添加剂制造 添加剂制造
  • 聚合物工程 聚合物工程

背景情况:

  • 增材制造 (AM) 使用多用途材料,聚乙烯化物 (PVDF) 由于其独特的特性而成为主要候选者.
  • 了解宏观机械行为和微观结构机制之间的关系对于优化AM组件至关重要.

研究的目的:

  • 在AM PVDF中建立宏观机械行为和微观结构机制之间的相关性.
  • 研究变形速率对3D打印PVDF组件机械反应的影响.
  • 为了评估AM PVDF在各种应变率下与现实应用相关的性能.

主要方法:

  • 测试AM PVDF样本在一系列的应变速率 (10-300毫米/分钟) 的测试.
  • 使用热重力测量分析,差分扫描热量测量,风学测量,扫描电子显微镜,动态机械分析,拉曼光谱和能量分散光谱的表征.
  • 机械性质的评估,包括终极强度和产量强度,弹性模量,性,性强度,Charpy冲击强度和维克尔硬度.

主要成果:

  • 随着加载速度的增加,PVDF表现出应变硬化反应,强度增加了高达~25%,硬度增加了~15%.
  • 在极端应变率条件下,AM PVDF样本表现出弹性.
  • 灵敏度指数数据提供了对材料反应变化的洞察力.

结论:

  • 可以有效地利用变形速率来定制3D打印PVDF组件的机械响应.
  • AM PVDF显示出有前途的机械特性和弹性,使其适合苛刻的应用.
  • 该研究提供了一个全面的了解PVDF在动态负载下的行为.