Collection: Vectran HT T97 and T150 Outgassing Properties

Vectran HT T97 and T150 Outgassing Properties

CVCM (Collected Volatile Condensable Material) is a measure of the amount of volatile material that outgasses from a substance and then condenses on a cooler surface within a vacuum environment. In materials science, particularly in the context of spacecraft and other high-vacuum applications, CVCM is a critical parameter for assessing a material's suitability. A low CVCM value, typically below 0.10%, indicates that the material will not readily condense and contaminate sensitive components in a vacuum

Here's a more detailed explanation: 

·        Outgassing: Materials, especially in a vacuum, can release trapped gases and volatile compounds, a process called outgassing. 

·  ·  CVCM Measurement:

The ASTM E595 test method quantifies outgassing by measuring CVCM. In this test, a material sample is subjected to a vacuum (5 x 10^-5 torr) and elevated temperature (125°C) for 24 hours. A collector plate, maintained at a lower temperature (25°C), collects the outgassed material. 

·  ·  CVCM Calculation:

The mass of the collected material on the collector plate is measured, and the CVCM is expressed as a percentage of the original sample's mass. 

·  ·  Significance:

A high CVCM indicates that the material will release a significant amount of volatile material, which can condense on nearby surfaces, potentially causing contamination, obscuring optics, or interfering with electrical components. 

·  ·  Acceptance Criteria:

For space applications, NASA generally requires a CVCM of less than 0.10% for materials to be considered low-outgassing. 

·  ·  Related Parameters:

CVCM is often reported alongside Total Mass Loss (TML) and Water Vapor Regain (WVR), which provide a more comprehensive picture of a material's outgassing behavior.