Property of cellular silicone from high-vinyl silicone gums as a function of porosity (referenced to SE54 gum). [Density, porosity, deflection, compression set]
We have established the load-deflection properties of cushions from the high methylvinylsiloxane (MVS) content gums, L97KVB-0.7, MN97KVB-0.7, and L60VB-0.7, as a function of cushion porosity. These properties are referenced to the properties of cushions from General Electric's (GE) SE54 gum which has considerably less MVS. The higher MVS gums produce considerably stiffer cushions. We have also evaluated the confined compression set of these various porosity cushions. There is no pattern for set as a function of porosity. Set is reduced at the higher MVS contents. We have established the densities of the cured solid elastomers (3219) from the four silicone gums. We have also calculated a linear relationship between porosity of the cushions and the wt % of urea temporary filler in the molding compound for the 97-type gums and L60 gum. L97KVB-0.7 and MN97KVB gums produce cushions with similar but not exactly the same load-deflections and sets, and are alike in their correlations of porosity with urea loading. L60VB-0.7 produces a softer cushion and probably has less set than the 97-type gums at 0.7% MVS. 13 figures, 36 tables.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6202142
- Report Number(s):
- UCRL-53366; ON: DE83011593
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FOAMS
MECHANICAL PROPERTIES
PHYSICAL PROPERTIES
SILICONES
COMPRESSION
CORRELATIONS
DEFORMATION
DENSITY
EXPERIMENTAL DATA
FILLERS
GUMS
HYSTERESIS
POROSITY
SWELLING
UREA
AMIDES
CARBONIC ACID DERIVATIVES
COLLOIDS
DATA
DISPERSIONS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
POLYMERS
SILOXANES
360603* - Materials- Properties