Outgassing Search and Report Help
Last Updated: 01/15/1997

General

The Outgassing Materials Search and Report function provides the capabilility to search all across materials tested at GSFC for determining the mass loss in a vacuum and for collecting the outgassed products.

NOTE that searches are case-insensitive (ABC is the same as Abc) and that they are performed as wild-card searchs (looking for SILICONE in Material will match all records with SILICONE anywhere in the Material field, returning RED SILICONE and BLUE FLUOROSILICONE).

Two-component materials are often listed at A/B, A/C, B/A or sometimes as name1/name2. Their relative amounts are also listed as a ratio; for example, 1/1, 100/73, and 50/50. These are mixed as parts by weight (BW or PBW) and sometimes by volume (BV). The cure temperatures are in degrees Celsius and the times can be listed as minutes (M), hours (H), or days (D). If no cure is listed, the cure data are not known. Also, the cures performed in vacuum are indicated by E-3 or E-6, referring to 10-3 or 10-6 torr, (0.13N/m² or 0.0013N/m²), respectively.

Some materials, like tapes and film adhesives, require special preparation for testing. For some early tests, tape samples were applied to a tubular screen (S), permitting the adhesive to be exposed totally to vacuum or were adhered to an aluminum ring (R), with the adhesive lying against the aluminum to permit outgassing at the edges. These techniques are no longer used. The present technique is to apply the tape to pre-weighed aluminum foil (F). Similarly, double-sided tapes and transfer film adhesvies are applied to pre-weighed aluminum foil (F) and covered with another piece of foil, a procedure that permits outgassing at the edges. This composite must be cut into smaller pieces for loading into the sample holder.

One must be aware that these data have been collected over a period of 25 years. It is likely that some materials have changed over this time span. The data can be used as a guide in selecting (with a fair degree of confidence) low-outgassing materials for space flight applications.

In the past, manufacturing difficulties have beeen encountered in the production of some material; e.g., the start-up of a new production facility, or the forced changed in formulation of a product to the non-availability of a component - information not always made public. As a consequence, one may find different results for a material having the same designated cure conditions. Sometimes "Batch Testing" should be the prudent course to follow if an application is considered critical; i.e., testing each lot of a material obtained over a lengthy period of time.

Material Name

The name of a material. It will be followed by the mixture of components, if there is more than one component.

Category

Select section or category name(s) from the list. To select an item, click on it. To select additional items, use CTRL-click.
Section
Number		Section Name
1Adhesives
2Cable Insulation and Shrink Tubing
3Conformal Coating
4Electrical Components
5Electrical Shields
6Films and Sheet Materials
7Foams
8Greases and Lubricants
9Lacing Table and Cord Cable Ties
10Laminates and Circuit Boards
11Marking Materials and Inks
12Molding Compounds
13Paints, Lacquers, and Varnishes
14Potting Compounds
15Rubbers and Elastomers
16Tapes
17Thermal Greases
18Miscellaneous

Application

Enter the Application, up to 16 characters.

Total Mass Loss (TML)

The mass loss of the sample, determined from the weights before and after the 398 K exposure, expressed as a percentage. To select a sample with low outgassing, search for TML <= 1.0 percent.

Collected Volatile Condensable Material (CVCM)

The difference between the weight of a clean collector and of the collector having condensed materials will provide the mass of condensables To select a sample with low outgassing, search for CVCM <= 0.10 percent.

Data Reference

Data Reference is the sequential number assigned to a specific test case. Test cases below 10,000 begin with GSFC, while test cases greater than or equal to 10,000 begin with GSC. The following table delineates the year tests were performed:
Year GSFC # Range
67 0 106
68 107 899
69 900 1695
70 1696 2520
71 2521 3551
72 3552 4671
73 7672 5554
74 5555 6398
75 6399 7285
76 7286 8134
 
Year GSFC # Range
77 8135 8777
78 8778 10037
79 10038 10730
80 10731 11476
81 11477 12244
82 12245 12774
83 12274 13539
84 13540 14347
85 14348 15192
86 15193 16013
 
Year GSFC # Range
87 16014 16864
88 16865 17759
89 17760 18610
90 18611 19477
91 19478 20260
92 20261 20979
93 20980 21642
94 21643 22398
95 22399 23364
96 23365 24233

Manufacturer

Enter the 3 character manufacturer code. To search for a manufacturer code by name or to browse the manufacturer list, click the Mfr Lookup button.

Sort

  1. Select the field to sort on; Material is the default. The data is sorted in strict alphabetic and numerical order, where numbers are read from left to right, irrespective of the number of digits. For example, Scotchcast 282 is followed by Scotchcast 3. Also, numbers have precedence over letters; for example, MMM Tape 4016 appears before MMM Tape Y-966. It may be necessary to look for all known identifiers of a material to find it.
  2. Determine whether you want the results sorted in ascending or descending order; Ascending is the default.