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Effect of Water Immersion on Mechanical Properties of Polyurethane Pultruded Composites

机译：水浸渍对聚氨酯拉挤复合材料的力学性能的影响

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摘要

Polyurethane resins are being considered in a large number of new pultrusion applications, with many involving some type of environmental exposure. However, environmental data for thermoset polyurethane pultruded composites is not as widely available as it is for more common pultrusion resins such as polyester. This study examines three different formulations of polyurethane pultruded samples immersed in 150oF water over a 30-33 day period. Three-point flexural tests, short-beam tests, and compression tests were conducted over the 30 days of water immersion. These data were compared with a large database of properties for common pultruded composites using other resins exposed to similar environmental conditions. These comparisons show that the polyurethane composites offer better mechanical performance compared with pultruded composites produced from more commonly used resin systems.
机译：聚氨酯树脂在大量新的拉挤型应用中被认为是许多涉及某种类型的环境暴露的许多。然而，热固性聚氨酯覆膜复合材料的环境数据不像诸如聚酯的更常见的挤压树脂一样广泛可用。本研究研究了三种不同配方的聚氨酯覆疱样品在30-33天内浸入150多个水中。在水浸30天内进行三点弯曲试验，短梁试验和压缩试验。将这些数据与使用暴露于类似环境条件的其他树脂的普通覆膜复合材料的大型性能数据库进行了比较。这些比较表明，与由更常用的树脂系统产生的拉挤复合材料相比，聚氨酯复合材料提供更好的机械性能。

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