Limitations to tensile strength improvements of thin wood-sections by radiation grafting

Summary Evidence is presented indicating that limits to ultimate tensile strength improvements on thin wood sections by grafting techniques are set by structural rather than chemical factors. For effective tensile strength increase in woods, the strength of which is strongly dependent on individual fiber strength, grafting must be operative on both inter-fiber bonding and intrinsic fiber strength. The requirement is more pronounced in products modified by radiation rather than heat/catalyst means.The author proudly acknowledges his association with Dr. J. W. Wilson, Professor, Faculty of Forestry, The University of British Columbia, both as his graduate student and Research Associate. This opportunity is taken to express my deepest gratitude for all his trouble, help, confidence, and patience expanded throughout the past ten years.