应变速率行为对层状玻璃介层类型对固化和未固化聚合物的影响
Ahmed Elkilani1, Hesham El-Emam1, Alaa Elsisi2
1Civil and Environmental Engineering, University of Missouri, Columbia, MO 65211, USA.
Polymers
|March 28, 2024
概括
这项研究测试了七个聚合物间层的防爆玻璃,发现SentryGlas提供了高刚性和透明度. 聚乙烯布提拉尔 (Polyvinylbutyral) 是一种聚乙烯的材料.
科学领域:
- 材料科学 材料科学 材料科学
- 结构工程 结构工程
- 聚合物物理 聚合物物理
背景情况:
- 民用建筑面临着爆炸和冲击的风险,需要防爆设计.
- 层状玻璃对于外墙的防爆性能至关重要,但层间的行为需要进一步研究.
- 了解不同拉伸率下的聚合物间层反应,是弹性建筑的关键.
研究的目的:
- 实验性地研究七个聚合物介层在不同拉伸率下的准静态和动态反应.
- 为了在类似爆炸的条件下比较聚乙烯 (PVB),乙烯乙酸乙烯 (EVA),热塑性聚氨 (TPU) 和SentryGlas (SG) 的性能.
- 评估不同聚合物的适用性,作为结构应用中PVB的替代品.
主要方法:
- 在室温 (21-32°C) 下测试七种聚合物材料 (PVB,EVA,TPU,SG).
- 准静态测试在0.033s-1的拉伸率和动态测试在2s-1.1的速度.
- 高延展率测试 (20-50s-1) 使用滴量计仪器来确定应力-延展反应.
主要成果:
- 聚乙 (PVB) 在20s-1时表现出粘弹性行为,并在45s-1时变得非弹性.
- SentryGlas (SG) 显示出高刚性和透明度,为PVB提供了一个可行的替代品.
- 在七种材料中,在最大压力后的故障反应中观察到显著的差异.
结论:
- 该研究提供了关于聚合物介层在各种应变速率下的机械反应的关键数据.
- 由于其机械性能和光学清晰度,SentryGlas成为防爆玻璃的有希望的材料.
- 这些发现有助于开发先进的模型,以预测在爆炸事件期间的层状玻璃行为.
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