The objectives of this study were to produce and modify phenolic dispersion based adhesives using technology recently developed at Forintek and to further characterize the physical properties and bonding properties of these systems for veneer and composite board applications with emphasis on faster cure speed potential. Data developed in this study indicate opportunities to improve waferboard and plywood PF adhesives in terms of color, cure rate and application properties. Further research work is recommended to improve techniques for producing and characterizing appropriate powder disperson-like formulations for wood bonding.
Further data on flow, viscosity-solids and veneer bonding at dry and 11 plus or minus 2% wood m.c. conditions are provided for heated PF powder systems. This information is intended to supplement the main report issued in March 1987.
As part of the ongoing program to generate long-term field test performance data on preservative treated wood products, all stakes currently undergoing evaluation at the Chalk River and Ottawa field test plots were evaluated and results entered into a computerized field test data base. Aspen poplar stakes treated with CCA-C and ACA preservatives continue to perform well after two years in service at the Ottawa plot, but preliminary indications are that those treated with CCA-C are performing slightly better than their ACA treated counterparts. CCA-C and ACA treated Hem-Fir plywood stakes, with and without field cut preservative on the cut edges, have been in service for one year at the Ottawa test plot and in PWF test boxes in service at the Ottawa laboratory. Some possible signs of decay on stakes treated with 4.8 kg/m3 of CCA-C and installed in the test boxes, where there is an accelerated decay hazard, have been observed. Duratreet II stakes installed at Chalk River in 1980 are continuing to perform well at the higher retention levels. The oils and co-solvents used in the Duratreet formulation do not appear to provide a significant degree of protection by themselves. Commercially treated CCA-C aspen poplar mini-ties and red pine timbers were used to construct two landscape boxes at the Ottawa test plot in order to evaluate both the performance of the treated timbers in this type of application, as well as the effectiveness of field cut preservatives in protecting the cut ends of the timbers.
The report focuses on the development of a process for the conversion of aspenwood to ethanol, butanol or butanediol. The conversion process was based on steam pretreatment of aspenwood followed by enzymatic hydrolysis of the cellulose and hemicellulose polymers and subsequent fermentation of the liberated sugars to liquid fuels.
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