- Author
-
Shaw, M. T.
|
Tobolsky, A. V.
- Title
- Thermal Stability of the Carbon-Carbon Crosslinkage in Polymer Networks.
- Coporate
- Princeton Univ., NJ
- Sponsor
- Office of Naval Research, Washington, DC
- Report
-
ONR-TR-RLT-123
April 1970
20 p.
- Distribution
- Available from National Technical Information Service
- Contract
- N00014-67-A-0151-0011
- Keywords
-
carbon
|
thermal stability
|
elastomers
|
silicones rubber
|
polyethylenes
- Identifiers
- chemical stress relaxation
- Abstract
- The thermal stability of carbon-carbon crosslinkages in elastomeric systems was studied by comparing the vacuum chemical stress relaxation of samples with different concentrations of these crosslinkages. The systems studied included silicone rubber, crosslinked polyethylenes and Dexsil-201 rubber. Arrhenius activation energies of about 55 kcal/mole were found for the scission of these crosslinkages in the temperature range 300-350 deg C. Crosslinkages added to a sample by additional curing were found to be, in general, more stable than those first formed.