Title page for ETD etd-10112001-233044

Type of Document Master's Thesis
Author Scoville, Christopher R.
URN etd-10112001-233044
Title Characterizing the Durability of PF and pMDI Adhesive Wood Composites Through Fracture Testing
Degree Master of Science
Department Wood Science and Forest Products
Advisory Committee
Advisor Name Title
Loferski, Joseph R. Committee Chair
Frazier, Charles E. Committee Member
Kamke, Frederick A. Committee Member
  • durability
  • accelerated exposure
  • fracture testing
  • Wood composites
Date of Defense 2001-06-13
Availability unrestricted
The increased use of wood composites in building materials results in a need for a better understanding of wood adhesion. The effects of water and temperature exposure on the durability of wood products were assessed using the double-cantilever beam (DCB) method of fracture testing. The relative durability of phenol-formaldehyde (PF) and isocyanate (pMDI) adhesives was compared using a 2-hour boil test and an environmental test. The feasibility of using oriented strandboard (OSB), oriented strand lumber (OSL) and parallel strand lumber (PSL) for the DCB fracture method was assessed. The fracture resistance of PF was reduced significantly by the aging exposures. The fracture resistance of pMDI did not decrease after the 2-hour boil test. The DCB fracture method was shown to be useful with a square-grooved machined specimen using OSB and OSL.
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