@article{bergman_ibach_lapasha_denig_2009, title={Evaluating physical property changes for small-diameter, plantation-grown southern pine after in situ polymerization of an acrylic monomer}, volume={59}, DOI={10.13073/0015-7473-59.10.64}, abstractNote={Because of the large percentage of juvenile wood in small-diameter southern pine, this material has lower strength properties compared with the historic published values in the ASTM Standard D2555. Finding new, simple, and inexpensive ways of increasing these strength properties would increase the use of this material for residential construction. For this study, we chose in situ polymerization using the monomer 1,6-hexanediol dimethacrylate to enhance bending strength and stiffness. After determining the lower range of density, modulus of rupture (MOR), and modulus of elasticity (MOE) of juvenile wood from small southern pine logs, southern pine specimens were polymerized using both a vacuum-impregnation and a surfaceapplication approach. The results showed some significant physical property increases for the fully impregnated material that used a large amount of monomer. Although the surface-application approach used less monomer, the physical properties of the juvenile wood did not increase as expected. Only the 1-minute dip treatment showed a significant increase in both bending stiffness and strength, with a weight gain of 11.9 percent. For the surface-application approach, monomer moving to the wood surface during polymerization reduced their effectiveness in increasing MOR and MOE to the expected levels. Therefore, the challenge is finding a method that maintains polymer loading inside the wood structure during the curing process.}, number={10}, journal={Forest Products Journal}, author={Bergman, R. and Ibach, R. E. and LaPasha, C. and Denig, J.}, year={2009}, pages={64–71} }
 @article{lapasha_wheeler_1990, title={RESIN CANALS IN PINUS-TAEDA - LONGITUDINAL CANAL LENGTHS AND INTERCONNECTIONS BETWEEN LONGITUDINAL AND RADIAL CANALS}, volume={11}, ISSN={["0254-3915"]}, DOI={10.1163/22941932-90001180}, abstractNote={Lengths of longitudinal resin canals in Pinus taeda (loblolly pine) wood were determined by 1) peeling offthe bark and measuring the canals, visible as white lines along the surface, to the nearest mm, and 2) photographing aseries ofcross sections (4000) ofknown thickness with a movie camera, and sub sequently using a film editor and frame counter to ca1culate lengths. The values yielded by the. two methods were not significantly different and indicate that the less time-consuming method of peeling and measuring lengths is as reliable as the cinematographic technique.}, number={3}, journal={IAWA BULLETIN}, author={LAPASHA, CA and WHEELER, EA}, year={1990}, pages={227–238} }