STUDY OF THE REACTIONS OF FORMALDEHYDE WITH HYDROLYZABLE AND CONDENSED TANNINS OBTAINED FROM BARK EXTRACTS OF EUCALYPTUS CAMMALDULENSIS ALONG WITH THE DETERMINATION OF ADDED FORMALDEHYDE RATIO
The reactions of the hydrolysable tannin (Gallic acid) and condensed tannin (Flavanoid) with the released formaldehyde as a result of high temperature and different pH values along with different added ratios of para-formaldehyde were studied. According to the results obtained from Gel time and Pot...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
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College of Agriculture
2006-06-01
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| Series: | Mesopotamia Journal of Agriculture |
| Online Access: | https://magrj.mosuljournals.com/article_26358_764b23f9d67bfaafbbe976c54849b041.pdf |
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| Summary: | The reactions of the hydrolysable tannin (Gallic acid) and condensed tannin (Flavanoid) with the released formaldehyde as a result of high temperature and different pH values along with different added ratios of para-formaldehyde were studied. According to the results obtained from Gel time and Pot life tests, the best values of pH and ratio of formaldehyde needed were determined, and they were 6.5 and 20% respectively. These values considered to be good enough to promote co-polymerization between the sites of tannins and those of formaldehyde to give suitable adhesive which can be used in manufacturing many wood products. |
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| ISSN: | 1815-316X 2224-9796 |