Insoluble Lignin Models (2): Preparation, Characterization, and Reactions of A Polymer-Bound β-Aryl Ether Lignin Model
作者:
PatrickB. Apfeld,
LoisF. Bovee,
RobertA. Barkhau,
DonaldR. Dimmel,
期刊:
Journal of Wood Chemistry and Technology
(Taylor Available online 1988)
卷期:
Volume 8,
issue 4
页码: 483-504
ISSN:0277-3813
年代: 1988
DOI:10.1080/02773818808070697
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A unique lignin model dimer, 2-(2-methoxyphenoxy)-1-(3-methoxy-4-hydroxyphenyl)-1,5-pentanediol (8), was attached to a macroreticular polystyrene resin by means of a trityl ether linkage. The extent of model loading was determined by gravimetric analysis and Zeisel methoxyl content. When reacted under simulated kraft pulping conditions, the polymer model,8-TrP, afforded moderate yields of guaiacol, a fragmentation product. The addition of 29% ofp-dioxane or DMSO drastically depressed the yield of guaiacol from8-TrP.The polymer bound dimer model8-TrPand monomer model6-TrPwere relatively unstable to the harsh, simulated pulping conditions. Some or all of the observed guaiacol fragmentation product could have come from degradation of polymer-released model.
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