Abstract
A study was made of the softening curves of wood in different growth rings taken from young radiata pine trees. The curves were determined from the rate of twist of a strip of wood under constant torque when heated at a steadily increasing temperature. The softening points of about 80° and 100°C are attributed to hemicelluloses and lignins respectively and were indistinct in sapwood taken from the 3rd and 4th growth rings from the pith but became increasingly distinct in growth rings further from the pith. Heartwood in the juvenile wood zone had two distinct softening points. Differences in the softening curves are attributed to differences in the chemistry of the hemicelluloses.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
