NASA低邮寄认证用于测量粘合剂和其他材料中的排出物的行业标准试验是ASTM E595。由NASA开发以筛选用于空间的低偏向材料,测试确定放置在加热真空室中的材料样品的挥发性含量。首先在50%相对湿度下进行测试的样品24小时,然后称重。在此之后,它们将24小时进入测试室,在125°C和真空中设置至少5倍的真空-5torr. During the time in the test chamber, volatiles that outgas from the sample escape through a port in the test chamber and condense on a cooled (25°C) collector plate. The sample and condensate on the collector plate are then weighed to determine the total mass lost (TML) by the sample and the amount of collected volatile condensable materials (CVCM) on the collector plate. Materials pass or fail the test based on these TML and CVCM measurements. If the CVCM exceeds 0.1%, the material fails. The material will also fail if the TML exceeds 1%—though the TML may be offset by water vapor regained (WVR) by the sample in a subsequent measurement:

  • 如果CVC <0.1%和TM <1%,则材料通过。
  • 如果CVC <0.1%和Tm> 1%,则如果TML-WV <1%,则材料可通过。
  • If CVC > 0.1% or TML-WV > 1%, the material fails.






Two Component Silicone Systems: