It is shown experimentally that pentafluoroethane undergoes rapid protium-deuterium exchange with water in the presence of hydroxide ion. Addition of dimethylsulfoxide enhances the rate at least by a factor of 100. The first measured fractionation factor data are presented for the temperature range
Hydrogen exchange between water and epoxy resin
โ Scribed by Robert T. Fuller; Susan Sherrow; R. E. Fornes; J. D. Memory
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- English
- Weight
- 121 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
Two approaches were adopted to examine the irreversible interactions between water and a model epoxy resin (DGEBA/DDA). One was to employ XPS to investigate the changes of the chemical structure of the resin after immersion in water at a temperature of 90ะC and followed by completely drying. The oth
Hygrothermal aging at elevated temperatures tends to induce degradation in epoxy resins. To predict the effects of this degradation, a knowledge of absorption and transport behavior of water is needed. In this work, a model material (DGEBA/ DDA) has been employed to study the water absorption and ab