Citation
Przewloka S. R., . and Shearer B. J., . Effects of eliagic acid and derivatives thereof on water repellency and dimensional stability. pp. 132-138. ISSN 0128-1283
Abstract
Derivatives of the insoluble polyphenol ellagic acid and water soluble tetraguanidinium tetracholine tetrakis-benzyltrimethylammonium and tetrakis-tetramethylammonium eIlagates and 2 3 4 2 3 4-hexamethoxy-6 6-diisocyanato-diphenyl were prepared. The effects of these compounds upon water repellency and dimensional stability when impregnated into timber were examined. Water soluble ellagates improved water repellent effectiveness up to 32. Ellagic acid and 2 3 4 2 3 4hexamethoxy-6 6-diisocyanato-diphenyl increased initial swelling rates due to their solvent carriers. All trial compounds provided the timber wafers with additional dimensional stability predominantly by non-bonded non-leachable bulking. Generally a reduction in the extent but not the rate of moisture uptake was noted for the compounds investigated.
Download File
Full text available from:
Official URL: http://www.frim.gov.my/v1/JTFSOnline/jtfs/v20n2/13...
|
Abstract
Derivatives of the insoluble polyphenol ellagic acid and water soluble tetraguanidinium tetracholine tetrakis-benzyltrimethylammonium and tetrakis-tetramethylammonium eIlagates and 2 3 4 2 3 4-hexamethoxy-6 6-diisocyanato-diphenyl were prepared. The effects of these compounds upon water repellency and dimensional stability when impregnated into timber were examined. Water soluble ellagates improved water repellent effectiveness up to 32. Ellagic acid and 2 3 4 2 3 4hexamethoxy-6 6-diisocyanato-diphenyl increased initial swelling rates due to their solvent carriers. All trial compounds provided the timber wafers with additional dimensional stability predominantly by non-bonded non-leachable bulking. Generally a reduction in the extent but not the rate of moisture uptake was noted for the compounds investigated.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Timber |
| AGROVOC Term: | Solvents |
| AGROVOC Term: | Pinus radiata |
| AGROVOC Term: | Water uptake |
| AGROVOC Term: | Aliphatic acid derivatives |
| AGROVOC Term: | Bulking agents |
| AGROVOC Term: | Swelling |
| AGROVOC Term: | Wetting agents |
| AGROVOC Term: | Moisture content |
| AGROVOC Term: | Capillary circulation |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 06:27 |
| URI: | http://webagris.upm.edu.my/id/eprint/21724 |
Actions (login required)
 |
View Item |
