CLEAVAGE REACTIONS IN CROSSLINKED URETHANE ELASTOMERS.
Abstract
A study of network cleavage in a crosslinked polyurethane elastomer was made using the technique of stress relaxation. It was found that the data could be well represented by a sum of two exponential decay terms, and a theoretical explanation for this is presented. Stress relaxation in the polyurethane sample investigated is discussed in terms of the reversible cleavage of various linkages formed by isocyanate reactions. It is possible to identify two different decay processes and obtain activation energies for these processes. These are identified with cleavage of two different linkages. It is not possible at present to give a certain chemical identification of the linkages responsible for stress decay. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1964
- Accession Number
- AD0601851
Entities
People
- Arthur V. Tobolsky
- V. Johnson
- W. J. Macknight
Organizations
- Princeton University