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Details for article 5 of 8 found articles
| Title: |
Insoluble Lignin Models (4): Condensation Reactions of a Polymer-Bound Guaiacylpropanol Model |
| Author: |
Barkhau, Robert A. Malcolm, Earl W. Dimmel, Donald R. |
| Appeared in: |
Journal of wood chemistry and technology |
| Paging: | Volume 10 (1990) nr. 2 pages 269-291 |
| Year: |
1990-06-01 |
| Contents: |
The reactions of syringyl alcohol with itself and with either a soluble phenol, 3-methoxy-4-hydroxyphenylpropane (guaiacylpropane, 13) or an insoluble polymer-bound phenol, guaiacylpropanol (14)1, led to dimeric products. The low (11%), but significant yield of C5-Cα dimer 16 in the reaction of polymer-bound phenol with syringyl alcohol suggests that soluble lignin units are able to condense with insoluble lignin gels during the course of soda pulping. The yield of the C5-Cα dimer 15 in the soluble system was four times greater than that of the analogous heterogeneous dimer 16. Reactions of the polymer model 14 were not mass transfer limited. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 5 of 8 found articles
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