Abstract
The author reviews and updates the 'strong' and 'fragile' classification of ionic and molecular liquids. The author then extends this type of analysis to organic chain polymer systems. However, here the mw dependence of viscosity pre-exponents requires that a microscopic relaxation time be substituted. The author shows that the relaxation time for longitudinal stress which coincides with the 13C NMR relaxation time, is an appropriate choice, and then analyzes the existing data to show that polymer fragilities may exceed those of any simple liquids. On the other hand with suitable cross-linking, the 'strong' liquid extreme can be explored. The prospect of identifying the rigidity percolation threshold for organic polymers is discussed.
| Original language | English (US) |
|---|---|
| Title of host publication | Polymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering |
| Publisher | Publ by ACS |
| Pages | 755 |
| Number of pages | 1 |
| Volume | 62 |
| State | Published - 1990 |
| Event | Proceedings of the ACS Division of Polymeric Materials: Science and Engineering - Boston, MA, USA Duration: Apr 1 1990 → Apr 1 1990 |
Other
| Other | Proceedings of the ACS Division of Polymeric Materials: Science and Engineering |
|---|---|
| City | Boston, MA, USA |
| Period | 4/1/90 → 4/1/90 |
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Polymers and Plastics
- Engineering(all)