New Resin System from Lignin
In kraft pulp process for producing chemical wood pulps, economics require that the organic matters containing lignin in the spent liquor is burned for recovery of chemicals and heat. Kraft lignin, however, is a highly branched phenolic-like polymer possessing a variety of functional groups that provide potential reactive sites for chemical modification. Until now, many attempts have been made to utilize kraft lignin as a component of resins (Tomita et al., 1989; Yoshida et al., 1990; Kajiyama et al., 1994). Lee et al. (1991) prepared ozonized kraft lignin/epoxy resins and found that its wood gluability was satisfactory.
KeywordsAdhesive Strength Tensile Shear Kraft Lignin Epoxy Compound Wood Failure
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- Hatakeyama, IL, Iwashita, K., Meshituka, J., and Nakano, J., 1975, Effect of molecular weight on glass transition temperature of lignin, Mokuzai Gakkaishi, 21:618–623.Google Scholar
- Kajiyama, T., Sato, H., Sato, T., and Tomita, B., 1994, Development of wood adhesives from ozonized lignins, Proceedings from the Adhesives & Bonded Wood Symposium. Eds., C. Y. Hse, B. Tomita and S. J. Branham, Forest Products Society, Madison, Wisconsin, pp. 405–414.Google Scholar
- Lee, H. J., Tomita, B., and Hosoya, S., 1991, Development of Ozonized kraft lignin/epoxy resin adhesives, Wood Industry, 46: 412–417.Google Scholar
- Murayama, T. and Bell, J.P., 1970, Relation between the network structure and dynamic mechanical properties of a typical amine-cured epoxy polymer, J. Polym. Sci., Part A-2:8: 437-445.Google Scholar
- Nielsen, L. E., 1915, Mechanical properties of polymers and composites, NY: Marcel Dekker Inc.Google Scholar
- Tomita, B., Kurozumi, K., Takemura, A., and Hosoya, H., 1989, Ozonized lignin-epoxy resins synthesis and use, Lignin: Properties and Materials, Eds. W. G. Glasser and S. Sarkanen, ACS Symposium Series, No.397, Chapter 39, pp. 496-505.Google Scholar
- Yoshida, Y., Kajiyama, M., Tomita, B., and Hosoya, S., 1990, Synthesis of ozonized lignin/aminomaleimide resins using the Diels-Alder reaction and their viscoelastic properties, Mokuzai Gakkaishi:36: 440–447.Google Scholar