PROPERTIES OF THERMOSETTING POLYMERS AS EVIDENCED BY ELECTRICAL RESISTIVITY MEASUREMENTS
Abstract
An investigation of thermosetting polymer properties by electrical volume resistivity techniques is discussed. This approach yielded fundamental data sensitive to the structure of a polymer. It is possible to determine if a polymer is in configurational equilibrium. Explanations are given for the change in resistivity during polymerization, magnitude and temperature dependence of resistivity, glass transition, thermal stability and degradation of crosslinked polymers. For a number of amorphous polymers a linear relationship was found to exist between the logarithm of the magnitude of the resistivity at 25 C and the temperature dependence of the resistivity. The compensation law is observed to hold for the electrical conduction process in amorphous polymers. Evidence is presented which indicates that the glass transition in thermosetting polymers is a time-dependent relaxation process. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 05, 1962
- Accession Number
- AD0276575
Entities
People
- M.c. Petree
- R.w. Warfield
Organizations
- Naval Ordnance Laboratory